12-20 July 2017
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Contribution List

Displaying 1136 contributions out of 1136
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on 18 Jul 2017 at 09:15
Various astrophysical phenomena are believed to be powered by accretion onto black holes. Black holes draw matter in with its gravity, and matter gets heated to produce radiative or kinetic energy. The geometrical and physical characteristic of these accretion flow are diverse: spherical or disk-like, hot or cool, optically thin or thick, radiatively efficient or inefficient, local or global, ​
Presented by Myeong-Gu PARK on 17 Jul 2017 at 09:15
Session: Opening & Prizes
Presented by Ho-hwan CHUN on 12 Jul 2017 at 08:55
Session: Opening & Prizes
Presented by Karl-Heinz KAMPERT on 12 Jul 2017 at 08:40
CRD
on 20 Jul 2017 at 09:45
CRI
on 20 Jul 2017 at 09:00
DM
Session: DM(Dark Matter)
on 20 Jul 2017 at 16:00
on 20 Jul 2017 at 11:00
on 20 Jul 2017 at 11:45
NU
on 20 Jul 2017 at 14:45
Presented by Albert DE ROECK on 14 Jul 2017 at 09:15
Session: Opening & Prizes
on 13 Jul 2017 at 09:10
Session: Public Lecture
on 14 Jul 2017 at 19:30
Session: Public Lecture
on 19 Jul 2017 at 19:30
SH
on 20 Jul 2017 at 14:00
In this review, I will reflect on the lessons learnt in the past decade with regards UHECR propagation and their secondary signatures. Starting from a consideration of their travel through extragalactic space, consideration will be made about what can be said about their source evolution. Complimentary to this discussion about the propagation of the UHECR primaries, the information conveyed by the ... More
Presented by Andrew TAYLOR on 16 Jul 2017 at 08:30
Session: Opening & Prizes
Presented by Il H. PARK on 12 Jul 2017 at 08:30
High-redshift galaxies with strong star formation activity are likely sources of cosmic ray particles. At high-energies, these particles interact with the matter density and radiation fields of the galactic environment via hadronuclear, photo-pair and photo-pion processes to produce charged and neutral pions, neutrons and protons. The effect of these interactions is for the cosmic rays to deposit ... More
Presented by Ellis OWEN on 15 Jul 2017 at 18:15
The comparison of computed galactic spectra with in situ experimental data at lower energies is possible with observations made by the Voyager 1 spacecraft outside the dominant modulating influence of the heliosphere. Galactic spectra computed by galactic propagation models and considered to be local interstellar spectra (LIS's), for specifically electrons, protons, Helium and Carbon nuclei, can n ... More
Presented by Driaan BISSCHOFF on 17 Jul 2017 at 14:45
Session: Poster & Coffee
Board #: 078
Owing to the Pierre Auger observatory (PAO), we have an unprecedented amount of ultra-high-energy cosmic ray (UHECR) data. Using the data, we study the influence of the galactic magnetic field (GMF) on the trajectory of UHECRs with energy above 6x10^19 eV. The GMF is not uniform and its configuration is still uncertain. Besides, most studies on the GMF have been about the disk field. In this study ... More
Presented by Jihyun KIM on 13 Jul 2017 at 15:00
The origin of cosmic-ray (CR) PeVatrons is a long standing problem in the Astrophysics. The CR spectrum has a spectral break at about 1 PeV (so called, the knee energy). The diffusive shock acceleration at supernova remnants (SNRs) is believed to be the acceleration mechanism of CRs up to the knee energy. However, there are still many problems. One is the knee problem. It was estimated that SNRs c ... More
Presented by Yutaka OHIRA on 17 Jul 2017 at 17:00
Session: Poster & Coffee
Board #: 062
The analytical theory of diffusive acceleration of cosmic rays at parallel stationary shock waves of arbitrary speed with magnetostatic turbulence is developed from first principles. The theory is based on the diffusion approximation to the gyrotropic cosmic ray particle phase space distribution functions in the respective rest frames of the up- and downstream medium. We derive the correct cosmic ... More
Presented by Reinhard SCHLICKEISER on 13 Jul 2017 at 15:00
The Voyager 1 energy spectra of cosmic ray elements in the local interstellar medium (LISM) and models of interstellar propagation that fit these data and which also fit the data taken at 1 AU at high energies (Cummings et al., Astrophys. J., 2016) show a roll over from a power-law at high energies to a broad peak at lower energies. The break in the high-energy power law occurs at approximately 1 ... More
Presented by Alan CUMMINGS on 17 Jul 2017 at 17:30
Session: Poster & Coffee
Board #: 061
According to structure formation simulations, weak shocks with typical Mach number, M< 3, are expected to form in merging galaxy clusters. The presence of such shocks have been indicated by X-ray and radio observations of many merging clusters. In particular, diffuse radio sources known as radio relics could be explained by synchrotron-emitting electrons accelerated via diffusive shock acceleratio ... More
Presented by Hyesung KANG on 13 Jul 2017 at 15:00
We examine the distribution in the arrival directions of the highest energy cosmic rays observed by the Pierre Auger Observatory and Telescope Array using spherical harmonics. We take advantage of the highly anisotropic distribution of matter within the Greisen-Zatsepin-Kuzmin horizon as observed by the 2MASS Redshift Survey coupled with the relatively small deflections expected for protons from c ... More
Presented by Mohamed RAMEEZ on 17 Jul 2017 at 17:15
The High Energy cosmic-Radiation Detection (HERD) facility is a flagship and landmark scientific experiment onboard China's Space Station, planned for operation starting around 2025 for about 10 years. The main instrument of HERD is a 3-D calorimeter (CALO) sensitive to incident gamma-rays and particles from five sides. With this design, the effective geometric factor of HERD is more than one orde ... More
Presented by Yongwei DONG on 15 Jul 2017 at 16:30
Session: Poster & Coffee
Board #: 074
Identification and energy estimation of the primary particle of Extremely High Energy Cosmic Ray (EHECR) air showers may lead to understanding of the origin of Cosmic Rays having energy ≥ 〖10〗^20 eV. For such energies, photons are considered to be the most probable candidates. Preshowers formed by EHE photons in the earth’s magnetosphere have significant effect on the subsequent shower dev ... More
Presented by Gitanjali DEVI on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 066
A precise measurement of proton and helium fluxes by AMS-02 experiment exhibit a remarkable hardening at energies above 100 GeV/nucleon. These data challenge the current theoretical models of CR acceleration in Galactic sources and propagation in the Galaxy. A transition between different CR diffusion regimes would be a relevant interpretation for the observed break of the spectra in light of rece ... More
Presented by Behrouz KHIALI on 13 Jul 2017 at 15:00
The particle detector HEPD (High-Energy Particle Detector ) is a range-calorimeter for the near-Earth measurement of electron, proton and light nuclei fluxes from few MeV up to few hundreds MeV. It has been developed by the Italian "Limadou" collaboration in the framework of the Chinese-Italian CSES mission. The HEPD will allow to study the solar-terrestrial environment, Coronal Mass Ejections (CM ... More
Presented by Picozza PIERGIORGIO on 17 Jul 2017 at 14:00
Session: Poster & Coffee
Board #: 044
The Cosmic Ray Energetics And Mass experiment for the International Space Station, ISS-CREAM, aims to study the origin, acceleration and propagation mechanism of high-energy cosmic rays. The ISS-CREAM payload is scheduled to be launched in 2017 to the ISS. The Top Counting Detector (TCD) and Bottom Counting Detector (BCD) are constructed for electron/gamma-ray physics. The TCD/BCD distinguish elec ... More
Presented by Hongjoo KIM on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 045
The Cosmic Ray Energetics And Mass (CREAM) instrument for the International Space Station (ISS) is a detector for studying the origin, acceleration and propagation mechanism of high-energy cosmic rays. The ISS-CREAM instrument is scheduled to launch in 2017 to the ISS. The Top and Bottom Counting Detectors (TCD/BCD) are designed for studying electron and gamma-ray physics. The TCD/BCD are composed ... More
Presented by Sinchul KANG on 13 Jul 2017 at 15:00
Recent years are marked with many breakthroughs in astrophysics of cosmic rays (CRs), and more are expected in the nearest future. Their proper interpretation is impossible without a well-developed propagation code. The GALPROP project celebrates its 21st anniversary this year. This project is devoted to the development of a self-consistent model for CR propagation in the Galaxy and associated dif ... More
Presented by Igor MOSKALENKO on 17 Jul 2017 at 14:30
Session: Poster & Coffee
Board #: 076
Local interstellar spectra (LIS) for protons, helium and antiprotons are built using the most recent experimental results combined with the state-of-the-art models for propagation in the Galaxy and heliosphere. Two propagation packages, GALPROP and HelMod, are combined to provide a single framework that is run to reproduce direct measurements of cosmic ray (CR) species at different modulation leve ... More
Presented by Igor MOSKALENKO on 13 Jul 2017 at 15:00
The energy spectra of abundant heavy nuclei from carbon to iron collected by the NUCLEON space experiment after two years of operation are presented. The spectra were measured with use of both calorimeter and KLEM (Kinematic Lightweight Energy Meter) methods. The complex behavior of spectra from carbon to silicon in the energy range from a few TeV to hundreds of TeV per particle is pointed out and ... More
Presented by Alexander PANOV on 15 Jul 2017 at 13:30
The NUCLEON satellite experiment is designed for direct measurements of the energy spectra of cosmic-ray nuclei and the chemical composition (Z=1−30) at an energy range up to 1000 TeV. The energy spectra of protons and helium nuclei are presented. Some spectral peculiarities were found. The differences of protons and helium spectra are investigated.
Presented by Andrey TURUNDAEVSKIY on 15 Jul 2017 at 14:00
Session: Poster & Coffee
Board #: 012
The accurate measurement of the spectra of elemental composition of cosmic rays is curial to the origin of cosmic rays. However,the measurements of high energy cosmic rays are based on the ground experiments, the composition reconstruction depends on the hadronic interaction model and energy reconstruction, so large uncertainties are introduced in the measurements. In this paper, we proposed a n ... More
Presented by Chong WANG, Min ZHA, Lingling MA, Zhiguo YAO, Huihai HE, Shoushan ZHANG, Zhen CAO on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 047
Muon detector (MD) is water Cherenkov detector in Large High Altitude Air Shower Observatory (LHAASO) experiment. The liner is applied to seal 44 ton ultra-pure water, which is the major detection media of MD. The liner must protect the water from contamination and inhibit bacteriological activities. The MD conducts a long duration mission (~20 years), so any significant leak would have severe con ... More
Presented by Lingyu WANG on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 041
In this paper a description of the electronics and trigger system of the High Energy Particle Detector (HEPD) onboard the China Seismo Electromagnetic Satellite (CSES) and its main characteristics will be presented. CSES is a scientific mission dedicated to monitoring electromagnetic, plasma and particles perturbations of atmosphere and inner Van Allen belts caused by solar and terrestrial phenome ... More
Presented by Valentina SCOTTI on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 067
Interactions of cosmic-ray nuclei is the most well-understood contribution to the observed positron flux at the Earth. Various scenarios have been proposed, including sources in the spiral arms of the galaxies and nearby isolated sources, which can contribute to the measured flux. In our work we focus on sources such as the gamma-ray novae which can contribute to the observed positron flux, althou ... More
Presented by Jagdish Chandra JOSHI on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 065
Radio Galaxies (radio-loud AGNs) are common in galaxy cluster media (ICMs). In addition to their potential thermodynamical roles, these AGN may also serve to illuminate important ICM dynamical features, especially ICM shocks. Those interactions are revealed most clearly by radio synchrotron emissions from associated AGN Cosmic Ray Electrons (CRe). Here we report results from "MHD+CR" simulations o ... More
Presented by Thomas JONES on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 064
Cosmic ray particles can be accelerated in the supernova. A protoneutron star is formed in a few seconds after the supernova explosion of a massive star. Neutron stars may be one of cosmic ray sources. Therefore, the study of structure of protoneutron stars is significant to investigating the origin and acceleration of cosmic rays. The hyperons interaction mediated by strange mesons and the struct ... More
Presented by Xueling MU on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 039
The Cosmic Ray Energetics And Mass experiment for the International Space Station (ISS-CREAM) is scheduled for launch in 2017. It is designed to directly measure and identify the elemental composition of incident Galactic cosmic rays from a few hundred GeV to PeV energies. Such large energy range sensitivity is reached by using an electromagnetic sampling calorimeter (CAL) which measures the energ ... More
Presented by Nicolas PICOT-CLEMENTE on 13 Jul 2017 at 15:00
A precise knowledge of cosmic-ray hydrogen and helium isotopes provides important information to better understand Galactic cosmic-ray propagation. Deuteron and helium 3 species are mainly secondary particles created by the spallation of primary proton and helium 4 particles during their propagation in the Galaxy. Secondary-to-primary ratios thus bring direct information on the average amount of m ... More
Presented by Nicolas PICOT-CLEMENTE on 13 Jul 2017 at 16:45
Session: Poster & Coffee
Board #: 038
The Boron And Carbon Cosmic rays in the Upper Stratosphere (BACCUS) balloon-borne experiment flew for 30 days over Antarctica in December 2016. It is the successor of the CREAM balloon program in Antarctica which recorded a total cumulative exposure of 161 days. BACCUS is primarily aimed to measure cosmic-ray boron and carbon fluxes at the highest energies reachable with a balloon or satellite exp ... More
Presented by Nicolas PICOT-CLEMENTE on 13 Jul 2017 at 15:00
Galactic cosmic-ray (GCR) energy spectra observed in the inner heliosphere are modulated by interplanetary magnetic structures of solar origin on intervals of time compatible with the Sun rotation period and higher harmonics. A high counting rate particle detector aboard LISA Pathfinder allows for the measurement of galactic cosmic-ray and solar energetic particle integral fluxes above 70 MeV/n up ... More
Presented by Catia GRIMANI on 14 Jul 2017 at 17:45
Session: Poster & Coffee
Board #: 027
The Calorimetric Electron Telescope (CALET) is a space mission installed on the Exposed Facility of the Japanese Experiment Module (JEM-EF) of the International Space Station in August 2015 and collecting data since October 2015. In addition to high precision measurements of the electron spectrum up to TeV scale, CALET will also investigate the mechanism of cosmic-ray (CR) acceleration and propaga ... More
Presented by Paolo MAESTRO on 13 Jul 2017 at 15:00
The Calorimetric Electron Telescope (CALET) is a space mission installed on the Exposed Facility of the Japanese Experiment Module (JEM-EF) of the International Space Station in August 2015 and collecting data since October 2015. In addition to high precision measurements of the electron spectrum up to TeV scale, CALET will also investigate the mechanism of cosmic-ray (CR) acceleration and propaga ... More
Presented by Paolo MAESTRO on 17 Jul 2017 at 18:30
Session: Poster & Coffee
Board #: 005
In August 2015, the CALET (CALorimetric Electron Telescope)instrument, designed for long exposure observations of high energy cosmic rays, docked with the ISS (International Space Station) and shortly thereafter began to collect data. CALET will measure the cosmic ray electron spectrum over the energy range of 1 GeV to 20 TeV with a very deep calorimeter with both total absorption and imaging (TAS ... More
Presented by Ryohei MIYATA on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 021
In August 2015, the CALorimetric Electron Telescope (CALET), designed for long exposure observations of high energy cosmic rays, docked with the International Space Station (ISS) and began to collect data about two months later. CALET will measure the cosmic ray electron spectrum over the energy range of 1 GeV to 20 TeV with a very high resolution of 2% above 100 GeV, based on a dedicated instrume ... More
Presented by Yuma KOMIYA on 13 Jul 2017 at 15:00
CALET (CALorimetric Electron Telescope) Mission was launched to the International Space Station (ISS) in August 2015 and has been accumulating scientific data since October 2015. The CALET detector features a very thick calorimeter of 30 radiation-lengths which consists of imaging and total absorption calorimeters (IMC and TASC respectively). Due to its high energy resolution and its ability to di ... More
Presented by Yoichi ASAOKA on 14 Jul 2017 at 16:30
The PAMELA space experiment was launched on the 15th of June 2006 from the Baikonur cosmodrome. The scientific objectives addressed by the mission are the measurement of the antiprotons and positrons spectra in cosmic rays, the hunt for antinuclei as well as the determination of light nuclei fluxes from hydrogen to oxygen in a wide energy range and with high statistics. The apparatus comprises a t ... More
Presented by Wolfgang MENN on 13 Jul 2017 at 16:30
Session: Poster & Coffee
Board #: 026
The 10 years of measurements with the PAMELA calorimeter and neutron detector were used to probe the dipole anisotropy within the selected events. These events contain mostly electrons and positron with the partial contamination of nuclei of about a few tens of percent. The electron and positron energy ranged between 10 GeV and 1 TeV. The preliminary results are presented. They complement the prev ... More
Presented by Alexander KARELIN on 13 Jul 2017 at 15:00
The Cosmic Ray Energetics And Mass experiment for the International Space Station (ISS-CREAM) is a space-borne mission designed for the precision measurement of energy and elemental composition of cosmic rays. It is scheduled to be launched and installed on the ISS in August 2017. The Silicon Charge Detector (SCD), placed at the top of the ISS-CREAM payload, consists of 4 layers. Each layer has 26 ... More
Presented by Jik LEE on 15 Jul 2017 at 17:00
Session: High Light Talks
The CALorimetric Electron Telescope (CALET) space experiment, which has been developed by Japan in collaboration with Italy and the United States, is a high-energy astroparticle physics mission on the International Space Station (ISS). The primary goals of the CALET mission include investigating on the presence of possible nearby sources of high-energy electrons, studying the details of galactic p ... More
Presented by Shojii TORI on 14 Jul 2017 at 11:00
Session: Poster & Coffee
Board #: 029
During thunderstorms, radio emission from extensive air showers are influenced by atmospheric electric fields. These effects are observed at LOw Frequency ARray (LOFAR) radio telescope. We have presented a non-intrusive method to determine the atmospheric electric fields by using the intensity data of the radio signals. We have developed a method by using not only the intensity data but also the p ... More
Presented by Gia TRINH on 13 Jul 2017 at 15:00
Spatial diffusion under the influence of the Galactic magnetic field (GMF) plays a crucial role in the transport of cosmic-ray protons. The standard assumption is that the GMF is purely azimuthal and the diffusion process can be considered to be uniform and isotropic all across the Galaxy. However, this picture might be inaccurate, since both theoretical arguments and numerical simulations predict ... More
Presented by Andrea VITTINO on 17 Jul 2017 at 13:30
Session: Poster & Coffee
Board #: 003
The search for anisotropies in cosmic ray arrival directions with space experiments like the Alpha Magnetic Spectrometer (AMS-02) on the International Space Station is subject to a number of time- and energy dependent effects. Many of these systematics originate from the detector, the orbit and space weather: Selection efficiencies may vary as a function of detector position in the Earth's magneti ... More
Presented by Iris GEBAUER on 13 Jul 2017 at 15:00
The SuperTIGER (Trans-Iron Galactic Element Recorder) instrument launched from Williams Field, Antarctica on December 8, 2012 and flew for 55 days at a mean altitude of 125,000 feet on a long-duration balloon flight. SuperTIGER measured the relative abundances of Galactic cosmic-ray nuclei with high statistical precision and well resolved individual element peaks in the charge range Z=10-40. In ad ... More
Presented by Nathan WALSH on 13 Jul 2017 at 17:15
Session: Poster & Coffee
Board #: 024
Maury Goodman for the NOvA collaboration Seasonal variations of cosmic ray muons have been well-measured by a number of underground experiments at a variety of overburdens and it has been found that the rate of muons increases in the summer and decreases in the winter. This is understood from the properties of the atmosphere as the temperature varies. We have measured with large statistics the sea ... More
Presented by Alec HABIG on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 014
The Cosmic Ray Energetics And Mass for the International Space Station (ISS-CREAM) instrument is designed and built to measure elemental spectra of cosmic-ray nuclei (1 ≤ Z ≤ 26) and electrons. It will measure energy of incident cosmic rays from 10^11 to 10^15 eV with a tungsten/scintillator sampling calorimeter and densified carbon target with an interaction length of ~ 1 λ_L. A finely segme ... More
Presented by Jacob SMITH on 13 Jul 2017 at 15:00
The balloon-borne Cosmic Ray Energetics And Mass experiment had its third flight (CREAM-III) over Antarctica for 29 days from December 17, 2007 to January 19, 2008. CREAM-III was designed to directly measure the elemental spectra of cosmic-ray nuclei from Hydrogen to Iron in the energy range from 10^12 to 10^15 eV. Energy of incident cosmic rays was measured with a calorimeter that consisted of a ... More
Presented by Jacob SMITH on 14 Jul 2017 at 14:15
DAMPE is a space-borne cosmic ray telescope satellite designed to measure electron, gamma and cosmic ray nuclei with high energy resolution and wide dynamic range, which was launched in December 2015, into a sun-synchronous orbit at 500km altitude and 97 degree inclination. BGO calorimeter of DAMPE is a total absorbed calorimeter for measuring energy of cosmic ray via separately detecting shower d ... More
Presented by Jingjing ZANG on 14 Jul 2017 at 14:45
Session: Poster & Coffee
Board #: 028
The search for anisotropies in cosmic ray arrival directions requires knowledge of the expected measurement in case of isotropic cosmic ray arrival directions. This expected measurement can then be used as a reference to search for deviations from the isotropic case in data. Two types of anisotropies are commonly cited in the literature: (i) relative anisotropies where the arrival directions of ot ... More
Presented by Miguel Angel VELASCO on 13 Jul 2017 at 15:00
We present a measurements of electron and positron fluxes below the geomagnetic cutoff rigidity in wide energy range from ~50 MeV to several GeVs by the PAMELA magnetic spectrometer. The instrument was launched on June 15th 2006 on-board the Resurs-DK satellite on low orbit with 70 degrees inclination and altitude between 350 and 600 km. Features of spatial distributions of secondary electrons and ... More
Presented by Vladimir MIKHAILOV on 14 Jul 2017 at 18:15
Session: Poster & Coffee
Board #: 057
In the Polar Geophysical Institute a complex set was developed for secondary cosmic rays monitoring. The set integrates detectors of neutron, charged (electron-muon) and electromagnetic components of secondary cosmic rays. Data are recorded continuously with the resolution of 1 minute. Besides, by means of the scintillation detector on a Ø150×110 mm NaI(Tl) crystal, the differential spectrum of ... More
Presented by Yury BALABIN on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 025
Nitrogen nuclei in cosmic rays are believed to be produced both in the supernova and by collisions of heavier nuclei, such as oxygen, with interstellar matter. Knowledge of the rigidity dependence of the nitrogen flux is important in understanding of the propagation of both primary and secondary cosmic rays. A precision measurement of the nitrogen flux from 2 GV to 3 TV is presented based on 2 mil ... More
Presented by Valerio FORMATO on 13 Jul 2017 at 15:00
Session: High Light Talks
Precision measurements by AMS of fluxes and flux ratios of charged elementary particles in cosmic rays are presented. In the absolute rigidity range ∼60 to ∼500 GV, the antiproton, proton, and positron fluxes are found to have nearly identical rigidity dependence while the electron flux exhibits a different rigidity dependence. Below 60 GV, the antiproton-to-proton, antiproton-to-positron, and ... More
Presented by Andrei KOUNINE on 15 Jul 2017 at 11:30
In 6 years on the Space Station, AMS has collected enormous amount of data up to multi-TV on both primary and secondary cosmic rays. Primary cosmic rays, such as p, He, C and O, are believed to be mainly produced and accelerated in supernova remnants, while secondary cosmic rays, such as Li, Be and B are thought to be produced by collisions of heavier nuclei with interstellar matter. By measuring ... More
Presented by Vitaly CHOUTKO on 13 Jul 2017 at 14:00
Precision measurements by AMS of the antiproton flux and the antiproton-to-proton flux ratio in primary cosmic rays in the absolute rigidity range from 1 to 450 GV are presented based on 3.49 x 10^5 antiproton events and 2.42 x 10^9 proton events. At ~20 GV the antiproton-to-proton flux ratio reaches a maximum. Unexpectedly, above 60 GV the antiproton spectral index is consistent with the proton s ... More
Presented by Weiwei XU on 13 Jul 2017 at 13:30
Carbon and oxygen nuclei in cosmic rays are believed to be mainly produced and accelerated by Galactic sources such as supernova remnants. Detailed knowledge of the carbon and oxygen spectrums in the GV-TV rigidity region gives important information on the origin, acceleration, and propagation processes of cosmic rays. A precise measurement of the carbon and the oxygen fluxes from 2 GV to 3 TV is ... More
Presented by Qi YAN on 13 Jul 2017 at 14:30
Knowledge of the rigidity dependence of the boron-to-carbon flux ratio (B/C) is important in understanding the propagation of cosmic rays. A precise measurement of the B/C ratio in cosmic rays with rigidity from 1.9 GV to 2.6 TV, based on 2.3 million boron nuclei and 8.3 million carbon nuclei collected by AMS during the first 5 years of operation, is presented. The B/C ratio does not show any sign ... More
Presented by Alberto OLIVA on 13 Jul 2017 at 14:45
The precision measurements of the monthly cosmic ray fluxes for the period from May 2011 to November 2016 with Alpha Magnetic Spectrometer on the International Space Station are presented. This period covers the ascending phase of solar cycle # 24 together with the reversal of the Sun’s magnetic field polarity through the minimum. The detailed variations with time of the fluxes are shown. The ti ... More
Presented by Cristina CONSOLANDI on 14 Jul 2017 at 17:15
Precision measurements by the Alpha Magnetic Spectrometer on the International Space Station of the primary cosmic-ray electron and positron fluxes in the energy range up to 1000 GeV are presented. The electron flux and the positron flux each require a description beyond a single power-law spectrum. The electron flux and the positron flux are significantly different in their magnitude and energy d ... More
Presented by Zhili WENG on 13 Jul 2017 at 14:15
Session: Poster & Coffee
Board #: 059
We compute the spectra of cosmic-ray (CR) nuclei and anti-nuclei under a scenario where hadronic interaction processes inside supernova remnants (SNRs) can produce a diffusively-shock-accelerated “source component” of secondary particles. This scenario is able to explain the recent measurements reported by AMS on the antiproton/proton ratio, that is found to be remarkably constant at ∼60-450 ... More
Presented by Alberto OLIVA, Nicola TOMASSETTI on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 072
Antimatter nuclei in cosmic rays (CRs) are promising tool for the indirect detection of dark-matter annihilation signatures. However, the search of new-physics signals in CRs relies on our knowledge of the astrophysical antimatter background which, in turns, depends critically on the several fragmentation cross-sections that regulate production and destruction of antiparticles in the interstellar ... More
Presented by Jie FENG, Nicola TOMASSETTI, Alberto OLIVA on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 070
The precise measurements of cosmic ray fluxes and ratios by AMS-02 enable significantly improved constraints on the propagation models of cosmic rays. Here we use the newly reported Boron-to-Carbon ratio (B/C) from AMS-02 and the time-dependent proton fluxes from PAMELA and AMS-02 to constrain the source and propagation parameters of cosmic rays in the Milky Way. A comprehensive set of propagation ... More
Presented by Qiang YUAN on 13 Jul 2017 at 15:00
The eagerly awaited and freshly published AMS-02 data on the boron over carbon ratio (B/C) are decisive for the understanding of Galactic cosmic-rays propagation mechanisms. In turn, propagation models are a crucial ingredient for testing astrophysical scenarios as well as indirect dark matter searches. Based on the semi-analytical code USINE, we provide new benchmark propagation scenarios, unveil ... More
Presented by Yoann GENOLINI on 17 Jul 2017 at 16:45
We present measurements of the abundances of ultra-heavy (Z>29) cosmic rays made by the CRIS instrument on NASA’s ACE satellite. The data set corresponds to 6413 days of data collection beginning December 4, 1997 through May 31, 2016. The charge resolution that we obtain shows essentially complete separation of charges in the Z>28 range. We detected more than 1000 events over the charge range of ... More
Presented by W.R. BINNS on 13 Jul 2017 at 18:00
An analysis of anisotropies in the arrival directions of galactic protons, electrons and positrons has been performed by AMS on the International Space Station. An absolute anisotropy measurement has been performed with protons, electrons and positrons. These, together with the results of the anisotropy analysis of the electron to proton, positron to proton, and the positron to electron ratios wil ... More
Presented by Iris GEBAUER on 13 Jul 2017 at 13:45
Session: Poster & Coffee
Board #: 007
Knowledge of the rigidity dependence of the carbon-to-oxygen (C/O) flux ratio provides important insights to the origin, acceleration, and subsequent propagation processes of cosmic rays in the Galaxy. At high rigidities, the C/O flux ratio directly measures the relative production and acceleration properties of carbon and oxygen. At low rigidities, the C/O flux ratio also measures the average amo ... More
Presented by Yang LI on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 013
The Cosmic Rays Energy And Mass (CREAM) balloon payload directly measures the composition and elemental spectra of cosmic rays in the upper stratosphere. It is designed to probe the acceleration mechanism and propagation history of cosmic rays at energies from 10e12 up to 10e15 eV. Being the fifth flight in a series of seven, CREAM-V took data above Antarctica for 39 days from December 1st 2009 to ... More
Presented by Jacob Russell SMITH on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 008
The balloon-borne BACCUS experiment measures directly the elemental spectra of cosmic-ray nuclei from protons to Fe over the energy range ~10^12 to 10^15 eV. It focuses on the energy dependence of secondary to primary ratios (e.g. B/C) to investigate cosmic-ray propagation history. BACCUS consists of redundant and complementary particle detectors including the Timing Charge Detector (TCD), Transit ... More
Presented by Ki Chun KIM on 13 Jul 2017 at 15:00
CALorimetric Electron Telescope, CALET, was installed on the International Space Station in August 2015 and it has been collecting data since October 2015. Direct measurements of the high energy spectra of individual cosmic ray nuclei and of the energy dependence of secondary-to-primary abundance ratios are important for an understanding of their acceleration and propagation in the galaxy. CALET i ... More
Presented by Yosui AKAIKE on 13 Jul 2017 at 17:00
Session: Poster & Coffee
Board #: 017
The CALorimetric Electron Telescope (CALET) was launched to the International Space Station (ISS) on August 19, 2015 (JST), and has been returning science data since October 13, 2015 (JST). Through the main calorimeter (CAL), CALET observes the fluxes of high-energy electrons, gamma rays and nuclei. CALET measures the energy spectra of the more abundant cosmic-ray nuclei through 26Fe passing withi ... More
Presented by Yosui AKAIKE on 13 Jul 2017 at 15:00
The latest AMS results on the precision measurement of the positron fraction in primary cosmic rays in the energy range from 0.5 to 700 GeV based on ~20 million positron and electron events will be presented. This measurement extends the energy range of our previous observation and increases its precision. The new results show that at ∼260 GeV the positron fraction reaches its maximum. Compariso ... More
Presented by Zuhao LI on 14 Jul 2017 at 18:00
Session: Poster & Coffee
Board #: 011
The powerful Jovian magnetic field generates a magnetosphere where electrically charged particles, like electrons and protons, can be trapped and then injected into space through acceleration mechanisms. We have investigated whether the proton data measured by the PAMELA space experiment (from 9 July 2006 to 31 August 2014) show a signature which could be attributed to Jupiter itself. We notice la ... More
Presented by Marco RICCI on 13 Jul 2017 at 15:00
The TUS space experiment is aimed to study the energy spectrum and arrival direction of Ultra High Energy Cosmic Rays (UHECR) at E ~ 10^20 eV by measuring the fluorescence yield of EAS in the atmosphere. The "Lomonosov" satellite, with TUS, was launched at the April 16, 2016. Satellite now is in orbit and fully operational. The TUS collaboration plans to design and produce a ground-based system of ... More
Presented by Alexandr VOLVACH on 15 Jul 2017 at 14:15
The DArk Matter Particle Explorer (DAMPE) is a space-based mission designed as a high energy particle detector for measuring cosmic-rays and gamma- rays in space. It was successfully launched on December 17, 2015 and has been operated well for more than one year. The large effective area and thick calorimeter enables DAMPE to have very good potential to measure cosmic-rays from 20 GeV to 100 TeV. ... More
Presented by Chuan YUE on 17 Jul 2017 at 18:15
Session: Poster & Coffee
Board #: 019
We present precision monthly measurements of the cosmic-ray electron and positron fluxes in the energy range from 0.5 to 50 GeV with the Alpha Magnetic Spectrometer on the International Space Station. Individual electron and positron spectra have been measured for every Bartels rotation period (27 days) in the time range from May 2011 to November 2016, that covers the solar maximum of solar cycle ... More
Presented by Valerio VAGELLI on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 052
The response to primary and fragmented lead test beams measured by prototype silicon strip detectors, designed for use in the Heavy Nuclei eXplorer (HNX) and the Trans-Iron Galactic Element Recorder on the International Space Station (TIGERISS) experiments, was evaluated in a CERN test beam in Nov - Dec 2016. The 500 um thick, single-sided prototype silicon detectors have 32 DC-coupled strips with ... More
Presented by John KRIZMANIC on 13 Jul 2017 at 15:00
The energy spectra of cosmic-ray antiprotons and protons near solar minimum were precisely measured with BESS-Polar II (Balloon-borne Experiment with a Superconducting Spectrometer) during a long-duration flight over Antarctica in December 2007 and January 2008. The upper-TOF (UTOF) and lower-TOF (LTOF) scintillator hodoscopes measure the charge and velocity of incident particles. A thin plastic s ... More
Presented by Kenichi SAKAI on 15 Jul 2017 at 13:45
The energy spectra of galactic cosmic rays carry fundamental information regarding their origin and propagation, but, near Earth, cosmic rays are significantly affected by the solar magnetic field which changes over time. The time dependence of proton and electron spectra were measured from July 2006 to December 2009 by PAMELA experiment, that is a ballooon-borne experiment collecting data since 1 ... More
Presented by Beatrice PANICO on 13 Jul 2017 at 18:15
Session: Poster & Coffee
Board #: 010
The High-Energy Particle Detector (HEPD) is one of the payloads of the CSES space mission, built by the Italian “Limadou” collaboration. It will study the temporal stability of the inner Van Allen radiation belts, the precipitation of trapped particles in the atmosphere and the low energy component of the cosmic rays (5 - 100 MeV for electrons and 15 - 300 MeV for protons). Results of the test ... More
Presented by Beatrice PANICO on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 006
The most likely origins of high-energy galactic cosmic-ray electrons are believed to be localized in nearby young supernova remnants (SNRs) because of the energy losses by the inverse Compton scattering or synchrotron radiation. So it is expected that the energy spectrum of the GCR electrons in the TeV region that would be presented by CALET and DAMPE in the near future provides a crucial test of ... More
Presented by Shoko MIYAKE on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 022
GRAINE2015 is a balloon borne emulsion chamber launched on May 6, 2015 and its acceptance and flight duration is 3780m2 sr and 14 hours at 37km above sea level, respectively. The main scientific goals of GRAINE2015 are the precise measurement of sub GeV gamma-rays from Vela pulsar, the measurement of charm particle production cross section at high altitude in the air and the study of cosmic ray nu ... More
Presented by Atsushi IYONO on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 023
Simultaneous distribution between the deflection angle and the lateral displacement of fast charged particles traversing through matter have already been derived by applying numerical inverse Fourier transforms on the Fourier spectral density solved analytically under the Moliere theory of multiple scattering, taking account of ionization loss. This simultaneous distribution became valuable for im ... More
Presented by Atsushi IYONO on 13 Jul 2017 at 15:00
In eight years of operation, the Fermi Large Area Telescope (LAT) has detected a large sample of cosmic-ray protons. The LAT's wide field of view and full-sky coverage make it an excellent instrument for studying anisotropies in the arrival directions of protons at all angular scales. These capabilities enable the LAT to make a full-sky 2D measurement of cosmic-ray proton anisotropy complementary ... More
Presented by Matthew MEEHAN on 13 Jul 2017 at 17:30
Session: Poster & Coffee
Board #: 063
The ISS-based Calorimetric Electron Telescope (CALET) is directly measuring the energy spectrum and direction distribution of electron+positron cosmic-rays up to 20 TeV. A main goal of CALET is to identify a signature of a nearby supernova remnant (SNR) in electron+positron cosmic-rays. The Vela SNR has the highest potential to cause a spectral feature in the TeV region and/or a detectable anisotr ... More
Presented by Holger MOTZ on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 051
The operating principles of Neutron Monitors are nuclear reactions within the proportional counters. The output signal of these is an electric pulse for every secondary cosmic ray particle that interacts with the detector. The amplitude of the pulse signal reflects the amount of charge generated on each individual interaction. The estimated pulse height distribution provides an energy resolution i ... More
Presented by Rocío GARCÍA on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 030
Ultra-Fast Flash Observatory pathfinder(UFFO-p) was launched onboard Lomonosov on 28th of April, 2016, and now is under a various types of calibration for detection of Gamma Ray Burst(GRB)s. Since last September UFFO-p has taken X-ray data in space with UFFO Burst Alert Trigger telescope(UBAT), those X-rays are mostly diffused backgrounds however, the rate turns out to be higher than expected by a ... More
Presented by Hyomin JEONG on 13 Jul 2017 at 15:00
Since December 2015 the DAMPE detector is on-orbit at an altitude of 500 km and takes data smoothly. It consists of a Plastic Scintillator strip Detector (PSD), 
a Silicon-Tungsten tracKer-converter (STK), a BGO imaging calorimeter and a NeUtron Detector (NUD). The charge of incident cosmic rays (CRs) is measured through looking at the energy deposited in the PSD, and the tracks are reconstructe ... More
Presented by Paolo BERNARDINI on 14 Jul 2017 at 14:30
Session: Poster & Coffee
Board #: 042
The DArk Matter Particle Explorer (DAMPE) satellite is a powerful space detector launched on the 17th December 2015. The main objectives of the mission are in the research of Dark Matter signatures thanks to the detection of electrons and photons in an energy range going from few GeV up to 10 TeV. Moreover, insights on the origin and propagation mechanisms of the cosmic rays are also expected than ... More
Presented by Xin WU on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 015
The DArk Matter Particle Explorer (DAMPE) is a satellite-borne device for detecting high energy electrons, gamma-rays, protons and heavy-ions in space. The Plastic Scintillator Detector (PSD) is the top-most of the four sub-detectors of DAMPE, which was designed to measure charge of incident high-energy particles. It also serves as a veto detector for discriminating gamma-rays from charged particl ... More
Presented by Yapeng ZHANG on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 048
Solar neutrons can be probles for clarifying the ion acceleration mechansm in the Sun. However,t there are only a few 10 detections up to present. The SEDA-AP Fiber detctor on the International Space Station (ISS) has been currently observing solar neutrons from space. We have developped very compact solar neutron and gamma-ray monitor for the micro satellite ChubuSat-2 utilizing the multi-pixel p ... More
Presented by Kazutaka YAMAOKA on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 053
An Instrument for an exotic particle search (INSTEPS) in cosmic rays is proposed for detailed investigation of cosmic ray flux in the charge region 0.5 - 2 m.i.p., where a few strange results have been registered. These results could not be understood because of poor charge resolution. There is also 0.1 – 0.5 m.i.p. region, which is practically unknown because of a limited signal to noise ratio. ... More
Presented by George BASHINDZHAGYAN on 13 Jul 2017 at 15:00
Abstract content -- A hardening of the proton and helium fluxes is observed above a few hundreds of GeV/nuc. The actual distribution of the local sources of primary cosmic rays has been suggested as a potential solution to this puzzling behavior. Some authors even claim that a single source is responsible for the proton and helium anomalies. But how probable are such explanations ? To answer that ... More
Presented by Pierre SALATI on 17 Jul 2017 at 13:45
Precise measurements of positron/electron ratio in the 1-500 GeV range have challenged the “standard” model of CR production in SNRs. After a brief decline between 2-8 GeV, the ratio rises steadily with a trend towards saturation around 200-400GeV. These observations appear to be in conflict with the diffusive shock acceleration (DSA) mechanism, operating in a single SNR shock. We argue that e ... More
Presented by Mikhail MALKOV on 17 Jul 2017 at 16:30
Session: Poster & Coffee
Board #: 036
The next generation of experiments devoted to study extreme energy cosmic rays will be at space platforms. Recent satellite missions have shown that the UV light background is more complex than previous models. Therefore, the observation of transient luminous events TLEs at the upper atmosphere will be important. Information about the time and space evolution of this very fast events may need to b ... More
Presented by Epifanio PONCE on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 037
The nature and origin of cosmic rays remains one of the greatest puzzles of modern astrophysics after more than 50 years since their first registration. Several ground experiments have reported the rate registered at its height of operation. To continue with the study of cosmic rays, we propose obtain the rate at different heights in the Earth's atmosphere, developing a small and portable ultravio ... More
Presented by Epifanio PONCE on 13 Jul 2017 at 15:00
SuperTIGER (Trans-Iron Galactic Element Recorder) is a large-area balloon-borne instrument built to measure the galactic cosmic-ray abundances of elements from Z=10 (Ne) through Z=56 (Ba) at energies from 0.8 to ~10 GeV/nuc. SuperTIGER successfully flew around Antarctica for a record-breaking 55 days, from December 8, 2012 to February 1, 2013. In this paper, we present results of an analysis of th ... More
Presented by Allan LABRADOR on 14 Jul 2017 at 17:30
Session: Poster & Coffee
Board #: 073
The abundance of accelerators and the ambient conditions make Cygnus X and the Galactic Center a natural laboratory for studying the life cycle of cosmic-rays (CRs). This naturally makes them a highly interesting source in neutrino astronomy, in particular concerning a possible detection with the IceCube Neutrino Observatory. In this paper, we model the multiwavelength spectrum of the Cygnus X, fo ... More
Presented by Mehmet GUENDUEZ on 13 Jul 2017 at 15:00
The energy spectra of secondary nuclei (B, N, subFe) collected by the NUCLEON space experiment after two years of operation are presented. The spectra were measured using both calorimeter and KLEM methods. The behavior of spectra in the energy range from a few TeV to tens of TeV per particle is discussed.
Presented by Igor KOVALEV on 15 Jul 2017 at 18:30
The NUCLEON-2 experiment is aimed at the investigation of isotope and charge composition of medium, heavy and ultra-heavy ions (Z < 82) in the 300 MeV/N — 1 GeV/N energy range. The concept design of HICRS for the NUCLEON-2 satellite cosmic ray experiment is presented. The performed simulation confirms the isotope resolution algorithms and techniques.
Presented by Aleksandr KURGANOV on 13 Jul 2017 at 17:45
The spectra of cosmic rays observed at the Earth are determined by the properties of their sources and by the properties of their propagation in the Galaxy. Disentangling the source and propagation effects is a problem of central importance for cosmic ray astrophysics. To solve this problem, the study of the fluxes of antiparticles (positrons and antiprotons), and a comparison of these fluxes with ... More
Presented by Paolo LIPARI on 17 Jul 2017 at 14:15
Session: Poster & Coffee
Board #: 004
CALET is the long-term high energy cosmic ray observation mission on JEM-EF of the International Space Station. In order to extend measurements of electrons and gamma rays to the 10-20 TeV region and protons and nuclei to several hundred TeV, the CALET calorimeter (CAL) has a thickness of 30 radiation lengths. CAL is composed of a lead tungstate (PWO) Total AbSorption Calorimeter (TASC), a tungste ... More
Presented by Ozawa SHUNSUKE on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 058
Silicon Photomultipliers (SiPM) are small solid state photodetectors which can provide single photon counting with high quantum efficiency, fast response and good charge resolution. These devices have similar gains (10^6) as photomultiplier tubes but operate with a much lower bias ( < 60V). Many experiments are looking to use these devices instead of PMTs and ground-based experiments such as CMS, ... More
Presented by Jason LINK on 13 Jul 2017 at 15:00
In this work, we will show a way to distinguish various kinds of light nuclear isotopes in cosmic-rays using multivariate approach. Magnetic spectrometers are typically equipped with a magnet, a tracking system and a time-of-flight. This combination of apparatus can be used to reconstruct mass information of incoming charged particles from measurements of rigidity, speed and charge so that we can ... More
Presented by Wooyoung JANG on 14 Jul 2017 at 14:00
Session: Poster & Coffee
Board #: 031
UFFO Burst Alert and Trigger telescope (UBAT) is the X-ray trigger telescope of UFFO/Lomonosov to localize X-ray source with coded mask method and X-ray detector. Its X-ray detector is made up of 36 8x8 pixels Yttrium OxyorthoSilicate (Y2SiO5:Ce, YSO) scintillator crystal arrays and 36 64-channel Multi-Anode PhotoMultiplier Tubes (MAPMTs) for space mission. Its effective detection area is 161cm2 ... More
Presented by Min Bin KIM on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 032
The goal of Super Fluorescence Air SHower (sFLASH) is to reduce the current fluorescence yield systematic uncertainty to improve energy measurement of ultra-high energy cosmic rays. The experiment was performed at SLAC National Accelerator Laboratory to measure the air fluorescence yield from extensive air showers. A set of alumina target is placed in the electron beam to create a cascade in the a ... More
Presented by JianJung HUANG on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 054
TAROGE is an antenna array on the cliff of Taiwan’s east coast to monitor ultra-high energy cosmic rays (UHECR, > 10^19 eV). The antennas face the Pacific Ocean to detect radiowaves signals emitted by the UHECR-induced air shower. The unique terrain of the TAROGE site allows the antennas to collect both the direct-emission and the ocean-reflected radiowaves signals induced by UHECR. So far two T ... More
Presented by Tsungche LIU on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 049
SiRO is a detector measuring the flux and trajectory of cosmic muons, based on plastic scintillators, optical fibers (wavelength shifters) and readout by SiPM(MPPC-Multi Pixel Photon Counter) devices. The Detector is consisting of a stack of 6 active layers, grouped by 2 for determining the muon trajectories through 3 planes. One module has 24 plastic scintillators stripes with 2 fiber mounted on ... More
Presented by Bogdan MITRICA on 13 Jul 2017 at 15:00
The Dark Matter Explorer (DAMPE) was launched into a sun-synchronous orbit at the altitude of 500 km on Dec 17, 2015. Its main scientific objective is to detect electrons and photons in the range of 5 GeV-10 TeV with a high energy resolution. A first investigation to the flight data shows that the trigger system operates quite well. The trigger system reduces the trigger rate on orbit from about 1 ... More
Presented by Yang LIU on 15 Jul 2017 at 17:15
Session: Poster & Coffee
Board #: 050
From the investigation of ancient pyramid to the frontier’s surveillance, the muon flux is currently used for commercial and scientific purposes. In IFIN-HH Romania, the muon tomography represents a very important research area, several application being currently under investigation. The geological studies of old mining sites and the custom control are presently on preparation, using new muon d ... More
Presented by Bogdan MITRICA on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 035
The main goal of the High-Energy Ray Observatory (HERO) mission is to perform direct measurements of very high energy cosmic ray. Measurements will concern the following scientific goals: detailed study of charge composition of CR in knee region, studies of the energy spectra of Galactic and extragalactic CR, search for signatures of dark matter particles. HERO is planned to be launched onboard a ... More
Presented by Andrey TURUNDAEVSKIY on 13 Jul 2017 at 15:00
High precision spectrometry of galactic cosmic rays (CR) has revealed the lack of our understanding of how different CR elements are extracted from the supernova environments to be further accelerated in their shocks. Comparing the spectra of accelerated particles with different mass to charge ratios is a powerful tool for studying the physics of particle injection into the diffusive shock acceler ... More
Presented by Adrian HANUSCH on 15 Jul 2017 at 18:00
Session: Poster & Coffee
Board #: 068
The Fermi-LAT Collaboration has recently reported a new measurement of the inclusive cosmic-ray positron and electron spectrum in the energy range between 7 GeV and 2 TeV, obtained with almost seven years of all sky data processed with the Pass 8 event reconstruction. In this poster we discuss several interpretations of these results within a model where electrons and positrons are emitted by supe ... More
Presented by Andrea VITTINO on 13 Jul 2017 at 15:00
The Cosmic Ray Energetics And Mass experiment for the International Space Station (ISS-CREAM) is scheduled to be launched and installed on the ISS in August 2017, and will carry out a measurement of the energy and composition of energetic cosmic rays in space. The Silicon Charge Detector (SCD) will identify the charge of through-going cosmic rays. It consists of four layers, each with 2688 silicon ... More
Presented by GiHan HONG on 15 Jul 2017 at 17:30
Session: Poster & Coffee
Board #: 043
The DArk Matter Particle Explorer (DAMPE)can operate properly while crossing the South Atlantic Anomaly(SAA). Due to the high flux of cosmic rayin the SAA, the collected data within SAA may not be used for scientific observations. Based on the data from DAMPE, we improve the definition of SAA with more precise determination of the boundary.
Presented by Wei JIANG on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 033
We measured the production of $^{12}B$ and $^{12}N$ in the organic liquid scintillator. The delayed coincidence method has been used to determine the production of unstable isotopes. These isotopes are critical in understanding background in underground detectors used for rare events search. They are produced by cosmogenic-neutron interactions in the detectors. The production rates were measured a ... More
Presented by Makhti KOCHKAROV on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 040
A new Cosmic Ray DataBase (CRDB) is under development at the ASI Science Data Center, a facility of the Italian Space Agency (ASI) that provides support to several space missions and acts as a multi-mission science operation, data processing and data archiving center. To ensure a more extensive utilisation of space data from existing, archived and future missions, on-line access to archival data, ... More
Presented by Cecilia PIZZOLOTTO on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 018
The CALorimetric Electron Telescope, CALET, was installed on the International Space Station in August 2015 and it has been collecting data of high energy cosmic rays since October 2015. The primary purpose of CALET mission is obtaining high-precision direct measurements of the electron+positron spectrum up to the multi-TeV energy region, which can provide unique information on the presence of nea ... More
Presented by Yosui AKAIKE on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 002
The isotopic compositions of cosmic ray nuclei are of great interest since they directly reflect processes related to cosmic ray propagation through the galaxy. In six years of data taking, AMS has collected the largest available data set on fluxes of nuclei. For a selected nuclear charge value, the velocity and rigidity give a measurement of particle mass that allows measurement of relative isoto ... More
Presented by Matthew BEHLMANN on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 001
Lithium nuclei in cosmic rays are believed to be produced exclusively by collisions of heavier cosmic rays such as Be,B,C,N,O with the interstellar matter. Data from the previous experiments are limited and inconsistent. A precise measurement of the lithium flux from 2 GV to 3 TV, based on 2 million events collected by AMS in the first five years of operation, is presented. The detailed variation ... More
Presented by Laurent DEROME on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 077
Recently cosmic ray spectrum measurements made by Pamela and AMS-02 spectrometers showed that in the wide energy interval the spectra of protons and alfa-particles cannot be described with the constant exponent in the power law. It means that cosmic ray particles have the other sources of cosmic rays addition to supernova explosions. Such sources could be active dwarf stars. Such stars (for exampl ... More
Presented by Yuri STOZHKOV on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 034
Collider experiment is an efficient way to verify and improve the hadronic interaction models. Abundant of energy flow in the forward region of the collisions are believed to have large influence to the development of air-shower. LHCf is the experiment dedicate to verify the models by measuring the forward neutral particle production at the LHC. According to the LHCf results, no simulation model c ... More
Presented by Qidong ZHOU on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 009
The diurnal variation of cosmic ray intensity is measured by ground neutron monitor. The local time of maximum cosmic ray intensity is dependent on latitudinal location. Depending on solar activity, drift and diffusion effect control the local time of maximum intensity for cosmic ray intensity (Oh et al., 2010). Recently, we installed two neutron monitors at Daejeon in South Korea (October 2011) a ... More
Presented by Jongil JUNG on 13 Jul 2017 at 15:00
We present the measurement of the cosmic-ray proton spectrum between 54 GeV and 9.5 TeV using 7 years of Pass 8 flight data from the Fermi Large Area Telescope (LAT). We developed a dedicated proton event selection with an acceptance of 0.25 m^2 sr. Our analysis yields a large dataset with low statistical uncertainty and low residual contamination for a spectral measurement. The systematic errors ... More
Presented by David GREEN on 14 Jul 2017 at 16:45
HELIX (High Energy Light Isotope eXperiment) is a balloon-borne experiment designed to measure the chemical and isotopic abundances of light cosmic ray nuclei. Detailed measurements by HELIX, especially of 10Be from 0.2 GeV/n to beyond 3 GeV/n, will provide an essential set of data for the study of propagation processes of the cosmic rays. HELIX consists of a 1 Tesla superconducting magnet with a ... More
Presented by Nahee PARK on 15 Jul 2017 at 16:45
Session: Poster & Coffee
Board #: 016
We present an updated measurement of the cosmic-ray electron and positron spectrum between 7 GeV and 2 TeV, based on 7 years of data collected with the Fermi Large Area Telescope (LAT). The LAT is the first space-based instrument to directly explore the region above 1 TeV. At such high energies, the shape of the spectrum can provide useful information about the origin and propagation of cosmic-ray ... More
Presented by Alberto MANFREDA on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 060
Supernova remnants have been considered as the main source of Galactic cosmic rays. In order for supernova shock fronts to accelerate cosmic rays to the knee energy of ~5 PeV, the interstellar magnetic field must be amplified to ~ mG range over a large distance upstream of the shocks. Theory for such strong magnetic field amplification is challenging, and strongly modified supernova shocks may res ... More
Presented by Ming ZHANG on 13 Jul 2017 at 15:00
The High Energy Light Isotope eXperiment (HELIX), is a new balloon-borne 1 Tesla magnet spectrometer designed to measure light isotopic abundances including 10Be and 9Be to above energies of ~3 GeV/n. This requires precise measurements of the rigidity and velocity of the detected particles, necessitating a multisystem detector with a magnet/particle tracker, and ring imaging Cherenkov (RICH) detec ... More
Presented by Ian WISHER on 15 Jul 2017 at 17:45
Ultra-heavy galactic cosmic rays (UHGCR) with Z≥30, above the limits of nuclear fusion in stars, are of particular interest to astrophysics in probing the chemical composition of the galaxy and its origin and understanding the dynamics of high energy events like binary neutron star mergers and supernova explosions. Despite the discovery of cosmic-rays over 100 years ago, the individual elemental ... More
Presented by John KRIZMANIC on 15 Jul 2017 at 14:45
The SuperTIGER (Super Trans-Iron Galactic Element Recorder) long-duration balloon (LDB) instrument has measured the abundances of galactic cosmic-ray elements from 10Ne to 40Zr with high statistics and single element resolution and its measurements extend to about 56Ba. In its first flight, SuperTIGER recorded the best statistics of any instrument on UHGCR elements, with more than 1200 nuclei with ... More
Presented by Jason LINK on 14 Jul 2017 at 17:00
Session: Poster & Coffee
Board #: 055
Abstract The possible realization of the wide FoV and large pupil Schmidt recently proposed for a space instrument opens the possibility of realizing even more large pupil optical telescopes in space. This development is important for the realization of space observatories dedicated to the observation of the terrestrial surface and events in the terrestrial atmosphere, as well for astronomical obs ... More
Presented by Piero SPILLANTINI on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 056
The possible realization of the wide FoV and large pupil Schmidt recently proposed for a space instrument opens the possibility of realizing even more large pupil optical telescopes in space. This development is important for the realization of space observatories dedicated to the observation of the terrestrial surface and events in the terrestrial atmosphere, as well for astronomical observations ... More
Presented by Piero SPILLANTINI on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 071
The USINE code is a semi-analytical code to solve the transport equation of Galactic cosmic ray nuclei and predict their flux at the Earth from MeV to TeV. This code is then very suitable to perform extensive scan over parameters describing the Galactic properties and the propagation mechanisms, comparing a model to data for different cosmic ray species. This poster present the recent developments ... More
Presented by Mathieu BOUDAUD on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 075
The Fermi paradox is the discrepancy between the strong likelihood of alien intelligent life emerging (under a wide variety of assumptions) and the absence of any visible evidence for such emergence. We study the influence of gamma-ray bursts, dark clouds, and Galactic cosmic rays in addressing this intriguing unlikeness.
Presented by Jorge FERNANDEZ SORIANO on 13 Jul 2017 at 15:00
The CALorimetric Electron Telescope (CALET) has been collecting science data on the JEM-EF external platform of the ISS since mid-October 2015. To date, more than 300 million triggers generated by high-energy charged particles and photons from space have been recorded. The instrument includes a two-layered Charge Detector (CHD) equipped with segmented scintillators to identify - via a measurement ... More
Presented by Pier Simone MARROCCHESI on 14 Jul 2017 at 13:45
The LHCb experiment has the unique possibility, among the LHC experiments, to be operated in fixed target mode, using its internal gas target SMOG. The energy scale achievable at the LHC and the excellent detector capabilities for vertexing, tracking and particle identification allow a wealth of measurements of great interest for cosmic ray physics. We present the first measurement of antiproton p ... More
Presented by Giacomo GRAZIANI on 15 Jul 2017 at 14:30
Session: Poster & Coffee
Board #: 046
In Circum-Pan-Pacific Earthquake Belt, large-scale architectures are exposed to a danger of big earthquakes. In Japan, about 9,600 bridges on highways have been exposed to severe natural environment and hard wares over 50 years after construction. Aging effects in these architectures are worried to cause serious deterioration and accidents by earthquakes. It is urgently required to develop a nonde ... More
Presented by Takuro FUJIMAKI on 13 Jul 2017 at 15:00
Building on the success of balloon flights, a Cosmic Ray Energetics And Mass (CREAM) payload was transformed for exposure on the International Space Station (ISS) Japanese Experiment Module Exposed Facility (JEM-EF). This ISS-CREAM instrument is configured with redundant and complementary particle detectors capable of precise measurements of elemental spectra for Z = 1 - 26 nuclei, as well as ele ... More
Presented by Eun-Suk SEO on 14 Jul 2017 at 13:30
The satellite "Lomonosov" was launched on April, 26 2016. The main objective of the experiments on board this satellite– to study of extreme physical phenomena in space. Among them are Cosmic Ray of Ultra - High Energy (UHECR) and cosmic transient gamma-ray bursts. For UHECR measurements on board this satellite the mirror-type ultraviolet telescope (TUS) was installed for measurements of Extensi ... More
Presented by Mikhail PANASYUK on 17 Jul 2017 at 17:45
Session: Poster & Coffee
Board #: 069
​​​​​The High Energy cosmic-Radiation Detection (HERD) facility is a flagship and landmark scientific experiment onboard China's Space Station, planned for operation starting around 2025 for about 10 years. The HERD international consortium is composed of many institutions in China and Europe, as well as other countries. The main scientific objectives of HERD are indirect dark matter sea ... More
Presented by Shuang-Nan ZHANG on 13 Jul 2017 at 15:00
Einstein predicted the existence of gravitational waves one hundred years ago. They have been recently observed from pairs of merging Black Holes by the Laser Interferometer Gravitational-wave Observatory (LIGO). The physics of gravitational waves, the detection technique, the observations, including latest results, and implications will all be discussed.
Presented by Barry BARISH on 18 Jul 2017 at 08:30
Session: High Light Talks
The DArk Matter Particle Explorer (DAMPE), also known as “Wukong” (the famous “Monkey King” in China), is a space mission supported by the strategic priority science and technology projects in space science of the Chinese Academy of Sciences. The detector was developed by the collaboration with primary hardware and software responsibilities of Purple Mountain Observatory, University of Sci ... More
Presented by Jin CHANG on 17 Jul 2017 at 11:30
Session: High Light Talks
The NUCLEON space experiment was designed to measure energy spectra of cosmic ray nuclei from protons to iron in the energy range approximately from 1 TeV per particle to 1 PeV per particle with good individual charge resolution. The apparatus started the collection of data at the beginning of 2015 and it is in operation up to now. The expected duration of the mission is expected to be no less tha ... More
Presented by Alexander PANOV on 13 Jul 2017 at 10:30
The arguments surrounding the Galactic component of the cosmic rays, the energy budget, questions of composition, spectral features, anisotropy, sources etc, will be critically examined. We are moving into a new phase in the study of the Galactic cosmic rays where it is becoming clear that precision measurements are revealing new, and in some cases unexpected, features which are forcing us to deve ... More
Presented by Luke DRURY on 15 Jul 2017 at 09:15
Session: Poster & Coffee
Board #: 028
Due to their extremely high particle energies (up to 10^20 eV), cosmic rays are ideally suited to search for violations of Lorentz invariance. We consider isotropic, nonbirefringent Lorentz violation in the photon sector and specialize to the case of a photon velocity larger than the maximum attainable velocity of standard Dirac fermions. Up to now, bounds on this type of Lorentz violation have be ... More
Presented by Frans R. KLINKHAMER, Markus RISSE, Marcus NIECHCIOL on 18 Jul 2017 at 15:00
In more and more applications, semi-conductor photo sensors (SiPMs) are replacing classical photo multiplier tubes (PMT). They have the advantage of an easier handling due to their significantly lower bias voltage and a long life time without ageing. Due to their smaller size compared to PMTs, usually detectors need an adapted design for the application of SiPMs. While the linear dynamic range of ... More
Presented by Thomas BRETZ on 15 Jul 2017 at 16:45
Session: Poster & Coffee
Board #: 050
In the neutrino physics the direct measurement of the cosmogenic neutrino at energy of 10^15 − 1018 eV is still a challenging item. The most resent analysis of IceCube data results in an energy spectrum between 10^13 and 10^16 eV. We present the preliminary results of detailed Monte Carlo simulation of tau-induced air shower. In this study we consider the higher tau decay branching ratio (π− ... More
Presented by Ali YILMAZ on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 081
As a first step of constructing Alborze-I array, its central cluster operation started in November 2016. The Alborze-I is an array with 20 scintillation detectors designed to study cosmic particles about the knee region and it is placed in Sharif University of Technology campus in Tehran at 1200m a.s.l. The central cluster of this array is consist of 5 scintillation detectors placed at the vertice ... More
Presented by Mustafa HEYDARIZAD on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 149
The sidereal time cosmic ray large-scale anisotropy with amplitude of 10−4–10−3 has been firmly detected by a number of experiments from sub-TeV to PeV. The angular phase is approximately stable for energies below 100 TeV, while the amplitude increases with energy, reaching the maximum around 10 TeV. Different models have been proposed to explain the origin of the anisotropy, concerning diff ... More
Presented by Songzhan CHEN on 18 Jul 2017 at 15:00
Young shell-type supernova remnants (SNRs) are believed to be a source of Galactic cosmic rays (CRs) with energies up to a few PeV. These particles are assumed to be energized via diffusive shock acceleration (DSA) in collisionless shock waves. Effective DSA process requires turbulent magnetic fields amplified to levels much higher than typically found in the interstellar medium. Such fields can b ... More
Presented by Oleh KOBZAR on 14 Jul 2017 at 17:00
Session: Poster & Coffee
Board #: 185
The presence of dense molecular clouds in the close vicinity of an astrophysical accelerator as a supernova remnant (SNR) affects the spectrum of accelerated particles, modifying the expected f(E)=E^{-2} behavior as derived in the diffusive shock acceleration scenario. Indeed, when a shock passes through a dense medium, magnetic field amplification is realized because of the turbulent motion of pl ... More
Presented by Silvia CELLI on 18 Jul 2017 at 15:00
Experimental complex (EC) NEVOD includes a number of unique experimental facilities for studies of main components of cosmic rays on the Earth's surface: a large volume Cherenkov water calorimeter (CWC) (2000 m^3) with a spatial lattice of quasi-spherical modules (QSM); a vertically deployed around CWC coordinate-tracking detector DECOR (total setup area 70 m^2) with a high spatial and angular res ... More
Presented by Igor YASHIN on 18 Jul 2017 at 17:15
The origin and composition of ultra-high-energy cosmic rays (UHECRs) remain a mystery. The proton dip-model describes the shape of the cosmic ray spectrum above 10^9 GeV by the effect of a pure proton spectrum propagating through the cosmic microwave background. In these interactions secondary neutrinos are produced. We fit the recent UHECR spectrum measurements from the Telescope Array experiment ... More
Presented by Jonas HEINZE on 19 Jul 2017 at 13:45
The shock formation, their electromagnetic structure, and the injection of suprathermal particles into the first-order Fermi acceleration processes at collisionless shocks constitute important problems of high-energy astrophysics. We report on recent studies of high Mach-number nonrelativistic perpendicular shocks with fully kinetic two-dimensional particle-in-cell simulations in applications to f ... More
Presented by Jacek NIEMIEC on 18 Jul 2017 at 14:00
Electron injection constitutes a central unresolved problem for diffusive shock acceleration processes. Here we study perpendicular nonrelativistic collisionless shocks in a regime of high Mach numbers, as appropriate for young supernova remnants. We use high-resolution large-scale two-dimensional fully kinetic particle-in-cell simulations that sample a representative portion of the turbulent shoc ... More
Presented by Artem BOHDAN on 18 Jul 2017 at 13:45
In this paper we present our estimation of the cosmic rays mass composition at energies over 10^17 eV. It was obtained from the analysis of the lateral distribution of cascade particles in extensive air showers registered at the Yakutsk EAS array over the course of continuous observations from 1974 to 2017. Experimental values were compared to simulation results obtained within the framework of fo ... More
Presented by Artem SABOUROV on 19 Jul 2017 at 16:45
Session: Poster & Coffee
Board #: 153
We present the results of the analysis of cosmic rays spectrum in energy domain above 10^17 eV. The analysis covers extensive air showers registered over the course of continuous observations from 1974 to 2017. A new refined relation was applied to reconstruct primary energy in individual events. It was derived from the lateral distribution of responses of surface and underground detectors of the ... More
Presented by Artem SABOUROV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 014
The Pierre Auger Collaboration has reported an excess in the number of muons of a few tens of percent over expectations computed using extrapolation of hadronic interaction models tuned to accommodate LHC data, Very recently, we proposed an explanation for the muon excess assuming the formation of a deconfined quark matter (fireball) state in central collisions of ultrarelativistic cosmic rays wit ... More
Presented by Jorge FERNANDEZ SORIANO on 18 Jul 2017 at 15:00
The Fluorescence detector Array of Single-pixel Telescopes (FAST) is a design concept for the next generation of ultrahigh-energy cosmic ray (UHECR) observatories, addressing the requirements for a large-area, low-cost detector suitable for measuring the properties of the highest energy cosmic rays. In the FAST design, a large field of view is covered by a few pixels at the focal plane of a mirror ... More
Presented by Toshihiro FUJII on 17 Jul 2017 at 13:30
We develop a simple one-zone model of the steady-state Crab nebula spectrum encompassing both the radio/soft X-ray and the GeV/multi-TeV observations. We determine analytically the photon differential energy spectrum as originated by an electron distribution evolved from a log-parabola injection spectrum. We find an impressive agreement with the synchrotron region observations whereas synchrotron ... More
Presented by Martin POHL on 14 Jul 2017 at 17:30
Non-linear diffusive shock acceleration (NDSA) is believed to be the mechanism responsible for the acceleration of cosmic-rays in supernova remnants. But current steady-state models fail to reproduce spectral features observed in supernova remnants, like spectral breaks or soft spectra at the highest energies. We present a fully time-dependent NDSA-model in which we simultaneously solve the transp ... More
Presented by Robert BROSE on 14 Jul 2017 at 16:45
Session: Poster & Coffee
Board #: 196
Supernova remnants are known to accelerate cosmic rays for their non-thermal emission of radio waves, X-rays, and gamma-rays. Although there are many models for the acceleration of cosmic rays in supernova remnants, the escape of cosmic rays from this sources is yet understudied. We use our time-dependent acceleration code to study the acceleration of cosmic rays and their escape from supernova re ... More
Presented by Robert BROSE on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 051
An array including 5 scintillation detectors in a pentagon configuration, similar to the central cluster of Alborz-1, is constructed at the biggest building rooftop of Sharif University of Technology (the same location of Alborz-1 proposal). Data of 10 week operation is used to get the average daily Rate of CR detection. Comparing obtained experimental value of daily rate (2697) by that of simulat ... More
Presented by Masoume REZAIE on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 179
A major feature of the energy spectrum of the cosmic radiation above 10**19 eV is the increasing fraction of heavy nuclei with respect to light nuclei. This fact, along with other simple assumptions, is adopted to calculate the energy spectrum of the cosmic radiation up to 2.4x10**21 eV . The predicted spectrum maintains the index of 2.67 observed at lower energies which is the basic, known, well- ... More
Presented by Antonio CODINO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 126
After huge advancements in SiPM technology made in the last years, they are perfect sensors for light detection in astroparticle physics experiments. They are very robust devices and have an equal or higher photon detection efficiency than conventional photomultiplier tubes (PMTs). In addition, SiPMs can be precisely calibrated exploiting their single photon resolution. We study their performance ... More
Presented by Julian KEMP on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 071
A neutron spectrometer network composed by several high-altitude stations was developed by the French Aerospace Lab. thanks to an advanced Bonner Sphere System extended to high energies. This instrument can measure the neutron spectrum over a wide energy range from meV up to tens of GeV with a short time resolution, allowing to investigate solar flare and seasonal variations. The first instrument ... More
Presented by Guillaume HUBERT on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 080
The Extreme Universe Space Observatory (EUSO) is designed to detect the highest energy particles in the Universe by observing the fluorescence and (reflected) Cherenkov light produced when these ultrahigh energy cosmic rays (UHECR) traverse the Earth's atmosphere. Unlike existing cosmic ray observatories, EUSO will view the atmosphere from above. A number of pathfinder missions have been completed ... More
Presented by Thomas PAUL on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 079
EUSO-TA is a ground-based cosmic ray fluorescence detector, pathfinder of the JEM-EUSO experiment, installed in 2013 at the Telescope Array (TA) site, in front of a TA fluorescence detector station, and completed with the focal surface in 2015, when it started to be operative. The data acquisition works in coincidence with TA, and this guarantees an easy identification of the cosmic ray events det ... More
Presented by Thomas PAUL on 18 Jul 2017 at 15:00
A fundamentally new tool for studying the Cherenkov light emission from EAS based on a slit camera, a Cherenkov differential detector (CDD), was created on the Yakutsk complex EAS array. Several these detectors were placed around the center of the array. Arranged in such a way, they operate as a part of a the main array and their data can be used for reconstruction of air shower arrival direction ... More
Presented by Yuriy EGOROV on 14 Jul 2017 at 14:30
Session: Poster & Coffee
Board #: 021
This work describes the system of tracking detectors operating at the Yakutsk complex EAS array. A technique is given for calculation of number of photons arriving from different heights of the atmosphere from the detector response and, thus, to reconstruct the longitudinal development of individual showers. We present the results of direct observations of the cascade curve and give the depth of m ... More
Presented by Valentina MOKHNACHEVSKAYA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 138
We will present the Data Processor (DP) and the flight software of EUSO-SPB. The EUSO-SPB experiment is a pathfinder mission of the EUSO program having as main objective to detect Ultra-High Energy Cosmic Rays (UHECR) by measuring, for the first time from the space, the fluorescence and the Cerenkov light produced by the interaction of the particle with the nuclei of the Earth’s atmosphere. The ... More
Presented by Valentina SCOTTI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 092
EUSO detectors are high-resolution fluorescence telescopes dedicated for measurements of ultra-high energy cosmic rays (UHECR). EUSO-TA is pathfinder experiment dedicated for testing of EUSO detectors and measurements of UHECR in coincidence with Telescope Array (TA) experiment. EUSO-TA is located in front of the Black Rock Mesa (BRM) detectors of the TA experiment. During few campains in years 20 ... More
Presented by Zbigniew PLEBANIAK on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 186
CRPropa is a public astrophysical simulation framework for studying propagation and interaction physics of primary and secondary cosmic ray particles. We have incorporated particle acceleration within CRPropa and studied the effects of geometry on the resulting spectral index in diffusive shock acceleration. In this contribution, we present our results and compare them to analytical calculations. ... More
Presented by Tobias WINCHEN on 18 Jul 2017 at 15:00
Cosmic rays in the inner solar system are subject to deflection by both the geomagnetic and interplanetary B-fields, and simultaneously interact with the Sun's photosphere resulting in the production of gamma rays. This phenomenon can be studied by observing the deficit ("shadow") in the cosmic ray flux from the direction of the sun and searching for an excess photon signal above the isotropic bac ... More
Presented by Mehr NISA on 13 Jul 2017 at 18:00
Tunka-Rex is a 3 km² large antenna array for cosmic-ray air showers at the TAIGA facility (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) in Siberia close to Lake Baikal. In autumn 2016 Tunka-Rex has been extended to a total of 63 stations, each equipped with SALLA antennas for two polarization directions operating in the band of 30-80 MHz. All antenna stations are triggere ... More
Presented by Frank SCHRÖDER on 15 Jul 2017 at 17:00
Session: Poster & Coffee
Board #: 111
LOPES, the LOFAR prototype station, was the radio extension of the KASCADE-Grande particle-detector array for cosmic-ray air showers. In different stages LOPES consisted of up to 30 antennas measuring the radio emission of air showers between 40 and 80 MHz with an energy threshold of around 100 PeV. Despite of the external trigger by the particle detectors, the separation of the air-shower signal ... More
Presented by Frank SCHRÖDER on 18 Jul 2017 at 15:00
Inelastic nucleus-nucleus (N-N) cross section is one of the most important physical parameters of an Extensive Air Shower (EAS) development. Value of this parameter was measured in past with relatively big uncertainty by few ground-based cosmic ray experiments up to 95 TeV in c.m.s. For simulation of EAS development at Ultra High Energy Cosmic Rays (UHECR) it is necessary to extrapolate N-N cross- ... More
Presented by Zbigniew PLEBANIAK on 18 Jul 2017 at 14:15
Vela Jr. (RX J0852.0-4622) is one of just a few known supernova remnants (SNRs) with the resolved shell across the whole electromagnetic spectrum from radio to very-high-energy (>100 GeV; VHE) gamma-rays. Its proximity and large size allow for detailed spatially resolved observations of the source making Vela Jr. one of the primary sources used for the study of particle acceleration and emission m ... More
Presented by Iurii SUSHCH on 19 Jul 2017 at 14:30
We report an updated diffuse photon flux limits based on the analysis of the Telescope Array surface detector events for the primary energies greater than 1 EeV. The point source flux limits are also presented for all directions in the Northern hemisphere. We report the results of down-going neutrino search.
Presented by Grigory RUBTSOV on 18 Jul 2017 at 14:30
Session: Poster & Coffee
Board #: 154
The Yakutsk array dataset in the energy interval $(10^{17},10^{19})$ eV is re-visited in order to interpret zenith angle distribution of extensive air shower event rate. Close relation of the distribution to the attenuation of the main measurable parameter of showers, $S_{600}$, is examined. The threshold effect on fluctuations of the parameter is essential to calculate the acceptance area of the ... More
Presented by Anatoly IVANOV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 082
The Extreme Universe Space Observatory on a super pressure balloon (EUSO-SPB) instrument is a pathfinder for space based cosmic ray fluorescence detectors. It was launched from Wanaka, New Zealand by NASA on the 24th of April 2017(UTC). The optical system of the instrument consists of 2 Fresnel lenses. The focal surface is a photomultiplier based, single photon counting camera with 2304 pixel and ... More
Presented by Johannes ESER on 18 Jul 2017 at 15:00
Measurement of individual cosmic rays species in a broad energy range from 50TeV to sub-EeV is one of main goals of LHAASO experiment. In order to cover the broad energyrange, the observations are divided into three stages, which are from 50 TeV to 10 PeV, from 10PeV to 100 PeV, from 100 PeV to EeV. In this paper, we present a preliminary investigation on the capability of particle identification, ... More
Presented by Lingling MA on 19 Jul 2017 at 13:45
Session: Poster & Coffee
Board #: 105
The Large High Altitude Air Shower Observatory (LHAASO), to be built at 4410 m a.s.l. near the Daocheng in the Sichuan province of China, is a new generation EAS array. It consists of three kinds of detector arrays. KM2A is the main array of LHAASO and is composed of 5195 scintillator detectors and 1171 muon detectors, which are distributed in an area of 1.3 km2. In this work, we study the trigger ... More
Presented by Zuo XIONG on 18 Jul 2017 at 15:00
The Large High Altitude Air Shower Observatory (LHAASO) is a multipurpose project focusing on high energy gamma ray astronomy and cosmic ray physics. The 1 km2 array (KM2A) of this observatory will consist of 5242 electromagnetic particle detectors (EDs) and 1171 muon detectors (MDs). The remoteness and numerous EDs extremely demand a robust and automatic calibration procedure. In this paper, a se ... More
Presented by Hongkui LV on 15 Jul 2017 at 13:45
Session: Poster & Coffee
Board #: 112
The Mini-EUSO instrument is designed by the JEM-EUSO collaboration to pave the way for space-based observations of Extreme Energy Cosmic Rays. To be placed inside the ISS later this year, it is a small UV (300 - 400 nm) telescope which will observe the Earth’s atmosphere with a spatial resolution of 5 km. Mini-EUSO is capable of detecting a wide variety of UV events such as cosmic ray signals, t ... More
Presented by Francesca CAPEL on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 113
The Mini-EUSO telescope is designed by the JEM-EUSO Collaboration to observe the UV emission of the Earth from the vantage point of the International Space Station in low Earth orbit. The main goal of the mission is to map the Earth in the UV, thus increasing the technological readiness level of future EUSO experiments and to lay the groundwork for the detection of Extreme Energy Cosmic Rays from ... More
Presented by Francesca CAPEL on 18 Jul 2017 at 15:00
The Telescope Array has accumulated the largest UHECR data set in the Northern hemisphere. We make use of these data to search for large- and small-scale anisotropy of UHECR arrival directions. At small angular scales, we report an update on searches for clustering of events and on correlations with various classes of putative sources. At large angular scales, we revisit, with the new data and wit ... More
Presented by Sergey TROITSKY on 19 Jul 2017 at 13:30
Session: Poster & Coffee
Board #: 097
The KASCADE Cosmic Ray Data Centre (KCDC) is a web-based platform to provide the astroparticle physics data for the general public. KASCADE and its extension of KASCADE-Grande fully completed the data accumulation at the end of 2013 after more than 20 years of measurements. The main purpose of KCDC is to archive original data such as from KASCADE to offer long-term scientific data for the high- en ... More
Presented by Donghwa KANG on 18 Jul 2017 at 15:00
KASCADE and KASCADE-Grande were detector arrays for the measurement of extensive air showers generated by high-energy cosmic rays in the PeV to EeV energy range. KASCADE-Grande has been operated for more than two decades and completed the data taking at the end of 2013. Now, a new analysis of the combined data from both arrays of KASCADE and KASCADE-Grande was performed, increasing both the effect ... More
Presented by Donghwa KANG on 13 Jul 2017 at 17:15
Session: Poster & Coffee
Board #: 098
We present the optical design of the baseline solution for the telescope of the KLYPVE-EUSO UHECR experiment. The adopted optical layout is a Schmidt camera covering a field of view of 40 degrees with an entrance pupil diameter of 2.5m, a 4m diameter spherical mirror and a focal length of 1.7m. The resulting very fast relative aperture (F/# 0.7) minimizes the detector size and its obstruction, res ... More
Presented by Paolo SANDRI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 057
The surface detector array of the Pierre Auger Observatory consists of 1660 water-Cherenkov detectors that sample the charged particles and photons of air showers initiated by energetic cosmic rays at the ground. Each detector records data locally with timing obtained from GPS units and power from solar panels and batteries. In the framework of the upgrade of the Auger Observatory, AugerPrime, new ... More
Presented by Tiina SUOMIJARVI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 059
The surface detector array of the Pierre Auger Observatory consists of 1660 water-Cherenkov detectors (WCDs) that sample the charged particles and photons of air showers initiated by cosmic rays of very high energy. With the AugerPrime upgrade, the collaboration aims to increase the particle identification capability of the surface detectors. Scintillator surface detectors (SSDs) will be added abo ... More
Presented by Zizhao ZONG on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 058
The LHAASO (Large High Altitude Air Shower Observatory) project, which is under construction at high altitude of 4400m a.s.l. in Sichuan, China, aims to observe the extensive air showers (EAS) induced by cosmic rays in the atmosphere. LHAASO consists of several large detector arrays including KM2A (1 km2 array), WCDA (Water Cherenkov Detector Array) and WFCTA (Wide Field of view Cherenkov Telescop ... More
Presented by Zizhao ZONG on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 063
The EUSO-SPB (EUSO super pressure balloon) experiment is designed to make observations of fluorescence light from Extreme Energy Cosmic Ray (EECR) Extensive Air Showers (EASs) by looking down on the atmosphere from above. The flight lasted for 13 days with a total of more than 30 hours of observations on dark nights. The balloon was launched on April 24, 2017, from Wanaka New Zealand. A navigation ... More
Presented by Malek MASTAFA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 121
In order to study the long-term stability of plastic scintillaotr for LHAASO-KM2A, thermal aging tests of materials(BC-408, ND-100, HND-S2) were made. A forecast of tile operational time was made for normal conditions of usage( 20% redution of light output).The plastic scintillator operational time can be estimated and its lifetime is determined from an Arrhenius plot.
Presented by Hongkui LV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 128
As the new generation of ground-based experiment, LHAASO-KM2A is aimed at unlocking the mystery of the century—the origin of high energy cosmic ray in the galaxy by probing the ultra-high energy gamma ray. The “triggerless” data acquisition system that KM2A uses will provide a solid platform for trigger selection research of the ground particle array experiment. The paper proposes to reduce ... More
Presented by Jia LIU on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 192
Galactic cosmic-rays (CRs) are expected to be accelerated in supernova remnants (SNRs). The behavior of the CRs is significantly affected by the magnetic field nature. However, it is open issue in the SNRs. Polarized synchrotron measurements can provide valuable information on the magnetic field. Indeed, in terms of turbulent magnetic field in inter stellar medium (ISM), it was shown that the corr ... More
Presented by Jiro SHIMODA on 18 Jul 2017 at 15:00
EUSO-Balloon was launched by the French Space Agency CNES from the Timmins base in Ontario (Canada) on the moonless night of August 25, 2014 UT. After reaching the floating altitude of about 38 km, EUSO-Balloon imaged the UV intensity in the wavelength range 290 - 430 nm for more than 5 hours before descending to ground using the key technologies of JEM-EUSO. A detailed and precise measurement of ... More
Presented by Mario BERTAINA on 15 Jul 2017 at 13:30
Session: Poster & Coffee
Board #: 144
SEARCH COSMIC RAYS SOURCES OF ULTRAHIGH ENERGY Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy, 31 Lenin Ave., 677980, Yakutsk, Russia. A.A. Mikhailov. ABSTRACT Earlier we suggested a new method search of sources and anisotropy of arrival directions particles of ultrahigh energy. Here by this method we analyzed data of Yakutsk EAS array and found that main part of particles with ener ... More
Presented by Alexey MIKHAILOV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 044
The goal of this study is to develop the mathematical and hardware complex for the improvement accuracy of the primary cosmic rays characteristics (the primary energy and mass) reconstruction. The complex is designed for ground and space based optical detectors for high and ultrahigh energy cosmic ray studies. In this paper the separation method based on the simultaneous recording light from one " ... More
Presented by Timur DZHATDOEV, Dmitry PODGRUDKOV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 076
EUSO-SPB (Extreme Universe Space Observatory - Super Pressure Balloon) is the first path-finder mission of the JEM-EUSO program which hosts a trigger logic following the concept envisaged for the main mission. Prior to its implementation the logic has been tested offline by means of dedicated simulations and experimental data taken at the TurLab facility as well as by the previous path-finder miss ... More
Presented by Mario BERTAINA on 18 Jul 2017 at 15:00
The KASCADE-Grande experiment has significantly contributed to the current knowledge about the energy spectrum and composition of cosmic rays for energies between the knee and the ankle. Meanwhile, post-LHC versions of the hadronic interaction models are available and used to interpret the entire data set of KASCADE-Grande. In addition, a new, combined analysis of both arrays, KASCADE and Grande, ... More
Presented by Andreas HAUNGS on 19 Jul 2017 at 17:30
Session: Poster & Coffee
Board #: 072
Silicon Photomultipliers (SiPM or MPPC) offer an alternative low light detector to Multi-Anode Photomultiplier Tubes with the benefits of low operating voltage, compact packaging and reduced susceptibility to damage. Design and construction of a Silicon photomultiplier Elementary Cell Add-on camera (SiECA) comprising front end opto-electric sensors, specifically designed ASIC signal processing chi ... More
Presented by Andreas HAUNGS on 18 Jul 2017 at 15:00
LHAASO (Large High Altitude Air Shower Observatory) will be constructed at 4400 m asl in Daocheng, Sichuan province, aiming to discover sources of UHE (ultra-high energy) cosmic ray and study of cosmic ray physics. The whole array includes 1171 muon detectors (MDs, about 40000 Square meters), which would be the largest muon detector array in the world. The special high altitude and wild field envi ... More
Presented by Xiong ZUO on 17 Jul 2017 at 13:45
We calculate the large-scale cosmic-ray (CR) anisotropies predicted for a range of Goldreich-Sridhar (GS) and isotropic models of interstellar turbulence, and compare them with IceTop data. In general, the predicted CR anisotropy is not a pure dipole; the cold spots reported at 400 TeV and 2 PeV are consistent with a GS model that contains a smooth deficit of parallel-propagating waves and a broad ... More
Presented by Gwenael GIACINTI on 14 Jul 2017 at 16:30
Session: Poster & Coffee
Board #: 133
Mini-EUSO (Extreme Universe Space Observatory) is a space mission developed by the JEM-EUSO International Collaboration, approved and selected by the Italian Space Agency (ASI) and, under the name “UV atmosphere”, by the Russian Space Agency Roscosmos, to be carried to the International Space Station (ISS) in one of the next planned launches. The Mini-EUSO instrument is a small, compact telesc ... More
Presented by Marco RICCI on 18 Jul 2017 at 15:00
Mini-EUSO (Extreme Universe Space Observatory) is a space mission developed by the JEM-EUSO International Collaboration, approved and selected by the Italian Space Agency (ASI) and, under the name “UV atmosphere”, by the Russian Space Agency Roscosmos, to be carried to the International Space Station (ISS) in one of the next planned launches. The Mini-EUSO instrument is a small, compact telesc ... More
Presented by Marco RICCI on 19 Jul 2017 at 18:15
Session: Poster & Coffee
Board #: 062
We describe the design and performance of the LIDRAE water Cherenkov air showers array installed at UFABC (23.6°S, 46.5°W, 750 m a.s.l.) to measure energy and arrival direction of primary cosmic rays with energies exceeding 100 TeV. The array is composed of three tanks filled with one thousand liters of water with a large aperture photomultiplier on the top cover of each tank overseen the water ... More
Presented by Marcelo Augusto LEIGUI DE OLIVEIRA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 109
The Telescope Array (TA) experiment detects air-showers induced by ultra high energy cosmic rays. The TA ground Surface particle Detector array (TASD) observed some short-duration bursts of air-shower like events. As reported at ICRC2015, these events are evidently correlated with lightning. Therefore, we have deployed detectors for lightning discharge in the vicinity of the TASD. We report the st ... More
Presented by Takeshi OKUDA on 18 Jul 2017 at 15:00
The Telescope Array Low-energy Extension (TALE) experiment is a hybrid air shower detector for observation of air showers produced by very high energy cosmic rays above 10^16.5 eV. TALE is located at the Telescope Array (TA) experiment site in the western desert of Utah, USA. TALE has a surface detector (SD) array made up of 103 scintillation counters (40 with 400 m spacing, 36 with 600 m spacing ... More
Presented by shigeharu UDO on 15 Jul 2017 at 14:45
We report results on ultra-high energy cosmic rays' chemical composition based on the data from the Telescope Array surface detector facility. The Telescope Array (TA) is an experiment designed for observation of extensive air showers from high energy cosmic rays, located in Utah, USA. TA surface detector (SD) array consists of 507 detector units, placed in a square grid with 1.2 km spacing with t ... More
Presented by Yana ZHEZHER on 17 Jul 2017 at 17:45
Session: Poster & Coffee
Board #: 049
The ALPACA is a new project which consists of a large air shower array (83,000 m^2) and a muon detector array (5,400 m^2) located at the altitude of 4,740 m near La Paz in Bolivia to observe 100 TeV gamma rays in the southern sky. The ALPAQUITA array is a prototype air shower array which will be constructed at the ALPACA site. This array consists of 45 scintillation counters of 1 m^2 in area each, ... More
Presented by Kazumasa KAWATA on 18 Jul 2017 at 15:00
The Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) mission is design to establish charged particle astronomy with ultra-high energy cosmic rays (UHECRs) and to discover cosmogenic tau neutrinos (CTNs). The study of UHECRs and CTNs from space will yield orders-of-magnitude increase in statistics of observed UHECRs and the discovery of the cosmogenic flux of neutrinos for the full predicted ... More
Presented by Angela V OLINTO on 18 Jul 2017 at 18:15
Session: Poster & Coffee
Board #: 139
We describe the design and implementation of the University of Chicago Infrared Camera (UCIRC) built for monitoring cloud coverage during the EUSO-SPB flight (Extreme Universe Space Observatory on a Super Pressure Balloon). UCIRC uses two infrared cameras with different wavelength filters (10 micron and 12 micron) to capture images of cloud cover under EUSO-SPB. The two infrared images taken every ... More
Presented by Angela V. OLINTO on 18 Jul 2017 at 15:00
In the Large High Altitude Air Shower Observatory project, Muon detectors will be built at 4400m above sea level. As water cerenkov detector, 44 tons of ultrapure water should be infused into the Muon detector. In this cold area, once the water inside the Muon detector freezes, consequence would be very serious. In this paper, a simulation of water temperature is built, the simulation data are con ... More
Presented by Shaohui FENG on 15 Jul 2017 at 14:15
Session: Poster & Coffee
Board #: 137
We are developing a fluorescence detector (FD) calibration device called an Opt-copter which consists of an UV LED, high accuracy GPS and unmanned aerial vehicle (UAV). The opt-copter is a standard light source to be used to calibrate Telescope Array (TA) FDs. The primary characteristic of the opt-copter is its high portability which enables us to put the light source on any position we want in th ... More
Presented by Yuichiro TAMEDA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 135
The flux of the ultra high energy cosmic rays (UHECRs) is extremely low, hence we need a huge observatory for UHECR research. However the larger the scale of the observatory, the higher the construction cost. In order to realize the next generation UHECR observatory, we should reduce the cost, dramatically. Therefore, we are developing a simple structure fluorescence telescope. The telescope consi ... More
Presented by Mashu YAMAMOTO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 107
Wide-field Imaging Cherenkov Telescopes Array (WFCTA) is one of important detectors for the Large High Altitude Air Shower Observatory (LHAASO). Since the optical system of each telescope is reflective type with comparable smaller F-number, the acceptance angles of converging light on the focal plane are markedly large meanwhile present complicated distribution. We design and optimize a square lig ... More
Presented by Chong WANG on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 127
The Multiwavelength Imaging New Instrument of Extreme Universe Space Observatory (Mini-EUSO) will be devoted to study the UV light emission coming from Earth. It consists of a compact telescope with a large field of view (40x40 sq. deg.) based on an optical system with two Fresnel lenses and a filter. The light is focused into an array of photo-multipliers tubes and the resulting signal is convert ... More
Presented by Sara TURRIZIANI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 045
The Telescope Array (TA) is an international experiment studying ultra-high energy cosmic rays. TA employs the fluorescence detection technique to observe cosmic rays. In this technique, the existence of clouds significantly affects the quality of data. Therefore, cloud monitoring provides important information. We are developing two new methods for evaluating night sky weather with pictures taken ... More
Presented by Takayuki TOMIDA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 114
The Large High Altitude Air Shower Observatory (LHAASO) will be constructed at Mt. Haizishan in Sichuan Province, China. Among several detector components of the LHAASO, the Water Cherenkov Detector Array (WCDA) is of great importance for low-to-middle energy gamma ray physics. Due to the full coverage feature of the WCDA array, the low energy threshold of particles for generating Cherenkov lights ... More
Presented by Hanrong WU on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 064
Several multi TeV EAS events monitored by a 4-fold small array of water Chernenko detectors. A square configuration for array of the detectors is used to detect of secondary particles of EAS events and in follow the EAS event. It was logged 476,675 true EAS events by the array in a period of 9 months. With the calculation of the local coordinates ($ heta,phi$) of the logged events, it is extracted ... More
Presented by Mehdi KHAKIAN GHOMI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 065
Anisotropy in the azimuth distribution of EAS events and East-West asymmetry is one of the problems of the EAS arrays. For a more accurate study it is needed a rich data which is very expensive in the EAS experiments. In this way it will be very fruitful to use CORSIKA code. But before any investigation it should be verified by a real experiment. Space accuracy of the recorded secondary particle i ... More
Presented by Mehdi KHAKIAN GHOMI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 018
With the aim to describe the longitudinal development of Cherenkov dominated showers we investigate the energy deposit and the number of charged particles in air showers induced by energetic cosmic rays. Based on the Monte Carlo simulations, discrepancies between different estimates of calorimetric energies are documented. We focus on the energy deposit profiles of air showers deducible from the f ... More
Presented by Vladimir NOVOTNY on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 181
The spectrum and morphology of the diffuse Galactic γ-ray emission carries valuable information on cosmic ray (CR) propagation. Recent results obtained by analizing Fermi-LAT data accumulated over seven years of observation show a substantial vari- ation of the CR spectrum as a function of the distance from the Galactic Center. The spatial distribution of the CR density in the outer Galaxy appear ... More
Presented by Sarah RECCHIA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 008
Hadronic interaction relevant to the air shower development is extensively studied at the Large Hadron Collider up to the cosmic-ray equivalent energy of 10^17eV. To extend the knowledge beyond this energy, or even below, collision energy dependence of the hadronic interaction is crucial. The Relativistic Heavy Ion Collider forward (RHICf) experiment will measure forward particles at the RHIC with ... More
Presented by Takashi SAKO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 108
The Wide Field of View Cherenkov Telescope Array (WFCTA), a main component of the Large High Altitude Air Shower Observatory (LHAASO), covers more than 2.5 orders of primary cosmic rays in each observation mode, which requires the dynamic range of the photoelectric device from 10 p.e. to 32000 p.e. The silicon photomultiplier (SiPM) is a new kind of photoelectric device developing rapidly in recen ... More
Presented by Zhen CAO, Shoushan ZHANG, Baiyang BI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 096
EUSO-SPB (Extreme Universe Space Observatory - Super Pressure Balloon) is the first path-finder mission of the JEM-EUSO program aiming at detecting the fluorescence light emitted by Extensive Air Shower produced by cosmic ray particles in the atmosphere. EUSO-SPB will fly in Spring 2017 from the Wanaka base in New Zealand on board a NASA Super Pressure Balloon with the possibility of reaching up t ... More
Presented by Francesco FENU on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 190
Middle aged pulsars are considered a plausible source of e+ observed in cosmic rays. The MAGIC high-energy pulsed gamma-ray flux observations from a young pulsar such as Crab and expected gravitational wave emission from pulsars and/or from circumpulsar precessing disks should compose a scenario resulting compatible with this hypothesis. The recent detection of gravitational waves by the LIGO expe ... More
Presented by Catia GRIMANI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 074
JEM-EUSO (Extreme Universe Observatory onboard Japanese Experiment Module) is a next-generation space-based UHECR observation project. The scientific objectives of the mission stem from enhanced capability of detecting extensive air shower events by fluorescence technique from Space. Accurate measurements of energy spectrum and arrival direction distributions of UHECRs require the determination of ... More
Presented by Kenji SHINOZAKI on 18 Jul 2017 at 15:00
The Large High Altitude Air Shower Observatory (LHAASO) will be constructed at Mountain Haizishan, in Sichuan Province, China (4410m a.s.l.). The Water Cherenkov Detector Array (WCDA), one of the major component of the LHAASO, will focus on surveying the northern sky for gamma ray sources from 100 GeV to 30 TeV. The whole WCDA, owing an area of 78,000 m2, is subdividing into 3120 detector cells (5 ... More
Presented by Cheng LIU on 18 Jul 2017 at 17:30
Session: Poster & Coffee
Board #: 125
The SiPM-based camera technology is designed and developed for the Wide Field of View Cherenkov Telescope Array (WFCTA) of the Large High Altitude Air Shower Observatory (LHAASO) in the paper. WFCTA consists of 18 Cherenkov telescopes. Each Cherenkov telescope consists of an array of 32×32 SiPM array which cover a field of view 14°×16°with a pixel size of 0.5 °. The main scientific goal of WF ... More
Presented by Shoushan ZHANG on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 011
A proposed new method for measuring the cherenkov light from extensive air showers (EAS) of cosmic rays (CR), which allows to determine not only the primary particle energy and angle of arrival, but also the parameters of the shower in the atmosphere - the maximum depth and "age". For measurements it is proposed to use Cherenkov light produced by EAS in a ground network of wide-angle telescopes wh ... More
Presented by Lev TIMOFEEV on 18 Jul 2017 at 15:00
The paper presents results obtained from radio emission measurements at frequency 30-35 MHz from air shower particles with energy E≥1019 eV. The data obtained at the Yakutsk array, for 1986-1989 and 2009-2014 years. The generalized formula for the description of the lateral distribution of radio emission was derived with use of fundamental characteristics of air showers: energy E0 and air shower ... More
Presented by Igor PETROV on 13 Jul 2017 at 17:45
Session: Poster & Coffee
Board #: 147
Our galaxy is filled with cosmic-ray particles and more than 98% of them are atomic nuclei. In order to clarify their origin and acceleration mechanism, chemical composition measurements of these cosmic rays with wide energy coverage play an important role. Imaging Atmospheric Cherenkov Telescope (IACT) arrays are designed to detect cosmic gamma-rays in the very-high-energy regime (~TeV). Recently ... More
Presented by Michiko OHISHI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 188
In recent years we witnessed several experiments measuring a large set of observables related to Cosmic-ray physics with an unprecedented level of precision. In order to be able to fully exploit this great amount of new data we must act to refine our theoretical predictions. This can be achieved by building more realistic models of Cosmic-ray Galactic transport. The DRAGON project has been pursued ... More
Presented by Arianna LIGORINI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 094
The TurLab facility is a laboratory, equipped with a 5 m diameter and 1 m depth rotating tank, located in the Physics Department of the University of Turin. In the past few years the TurLab facility has been used to perform experiments related to the observation of Extreme Energy Cosmic Rays from space using the fluorescence technique, as in the case of the JEM-EUSO mission, where the diffuse nigh ... More
Presented by Gregorio SUINO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 093
The Mini-EUSO instrument is a UV telescope to be placed onboard the International Space Station, serving as a pathfinder for the study of Extreme Energy Cosmic Rays from space by the JEM-EUSO collaboration. Mini-EUSO will map the earth in the UV range (300 - 400 nm) with a spatial resolution of 5km and a temporal resolution of 2.5 mus. Besides Cosmic Rays, Mini-EUSO offers the opportunity to study ... More
Presented by Gregorio SUINO on 18 Jul 2017 at 15:00
We are developing a wide field-of-view Cherenkov telescope with large dimensional refractive lens for sub-100GeV to TeV gamma ray astronomy. A prototype of the refractive telescope with the front-end electronics is designed, assembled, and tested to demonstrate the feasibility of the conceived instrument. In this work, we report some preliminary results on the detection of high energy Cosmic Rays ... More
Presented by Tianlu CHEN on 17 Jul 2017 at 14:00
Over the years, significant efforts have been devoted to the understanding of the radio emission of extensive air shower (EAS) in the range [20-250] MHz. Despite some studies led until the eighties, the [1-10] MHz band has remained unused for 20 years. However, it has been measured by these pioneering experiments and suggested by theoretical calculations that EAS emit a strong electric field in th ... More
Presented by Antony ESCUDIE on 18 Jul 2017 at 16:45
Session: Poster & Coffee
Board #: 040
A large subset of EAS radio observations by CODALEMA experiment in Nançay was used to measure the departure from a plane of the signal arrival times to the antennas. The study was done at two different scales in terms of range to the EAS axis. Below about 300m, by using a 10 antennas array triggered by neighbouring surface detectors, the average departure was found to be negligible (i.e. lower th ... More
Presented by Alain LECACHEUX on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 048
A three-fold antenna system has been installed nearby the center of the CODALEMA particle detector. Its goal is to measure the complete electric field produced by air showers, i.e. along the 3 polarizations EW, NS and vertical. Indeed on all currently operating radio detection arrays, only the horizontal NS and EW polarizations or their projections are measured. This allows the vertical electric f ... More
Presented by Richard DALLIER on 18 Jul 2017 at 15:00
During the past two decades, experiments in both the northern and southern hemispheres have observed a small but measurable energy-dependent sidereal anisotropy in the arrival direction distribution of Galactic cosmic rays with relative intensities at the level of one per mille. Individually, these measurements are restricted by limited sky coverage, and so the pseudo-power spectrum of the anisotr ... More
Presented by Juan Carlos DIAZ-VELEZ on 19 Jul 2017 at 14:15
Session: Poster & Coffee
Board #: 168
The chemical composition of ultra-high-energy cosmic rays (UHECRs) affects the observable distribution of air-shower Xmax values, the atmospheric slant depth at which the number of secondary shower particles reaches its maximum. The observed Xmax distributions at various primary UHECR energies can be compared with the distributions predicted by detailed detector simulations for any assumed composi ... More
Presented by Douglas BERGMAN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 046
The composition of ultra-high energy cosmic rays is still poorly known and this is an very important topic in the field of high-energy astrophysics. We detect them through the extensive air showers they create after interacting with the atmosphere constituents. The secondary electrons and positrons of the showers emit an electric field in the kHz-GHz range. It is possible to use this radio signal ... More
Presented by Benoît REVENU on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 047
Hosted by the Nançay Radio Observatory, the CODALEMA experiment is dedicated to radio detection of cosmic ray induced extensive air showers. It is composed of: • 57 self-triggering radio detection stations working in the 20-250 MHz band and spread over 1 km2; • an array of 13 scintillators as particle detector; • a compact array made of 10 cabled antennas, triggered by the particle detecto ... More
Presented by Benoît REVENU on 18 Jul 2017 at 15:00
The Telescope Array Low-energy Extension (TALE) experiment is a hybrid air shower detector for observation of air showers produced by very high energy cosmic rays above 10^16.5 eV. TALE is located at the Telescope Array (TA) experiment site in the western desert of Utah, USA. TALE has a surface detector (SD) array made up of 103 scintillation counters (40 with 400 m spacing, 36 with 600 m spacing ... More
Presented by Douglas BERGMAN on 17 Jul 2017 at 17:30
Session: Poster & Coffee
Board #: 036
The paper considers two independent methods of primary particles determination of cosmic origin. The particles give a rise to nuclear processes that generate cascade multiplication of various types of elementary particles. Methods are based on Cherenkov light registration at optical range of wavelength, formed by the interaction of secondary particles with the atmosphere and transition of charged ... More
Presented by Igor PETROV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 037
A method for observing the state of the atmosphere during optical observations of Vavilov-Cherenkov radiation in the region of the Yakutsk complex array is described. Classification of weather conditions during patrol observations of the atmosphere (autumn-winter-spring) is given, using cosmic rays with energies (1-10) PeV. Empirical results are compared with calculations for different grades of v ... More
Presented by Igor PETROV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 005
A description of the technique and results of the search for showers produced by neutral particles, such as high-energy gamma rays and astroneutrino, is presented. In order to do that, a comprehensive analysis of the data of electrons, muons and Cherenkov light of EAS and their time responses in scintillation and Cherenkov detectors was carried out. The upper limit of the flux of gamma quants at e ... More
Presented by Igor PETROV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 006
A comparison is made of the calculation of the spatial distribution of Cherenkov radiation from the primary proton performed with allowance for aerosol attenuation, with experimental data measured under different weather conditions at the Yakutsk EAS installation. It is shown that the transparency of the atmosphere affects the shape of the radial distribution of Cherenkov photons. With visibility ... More
Presented by Igor PETROV on 18 Jul 2017 at 15:00
The radio signals produced by extensive air showers initiated in the atmosphere by high energy cosmic rays are routinely observed and registered by the various instruments of the CODALEMA experiment located at the Nançay radio observatory and notably the large array of self-triggering stations equipped with wide band and dual polarisation antennas. Precise comparisons between observed radio signa ... More
Presented by Lilian MARTIN on 18 Jul 2017 at 16:30
The measurement of the electric field created by cosmic ray induced air showers is nowadays a well established technique. Due to technical limitations, the low-end part of the frequency spectrum of the field has not been thoroughly exploited or understood, even though some experiments have indicated a large electric field at low frequencies. In this work, we present a new equation for the electric ... More
Presented by Daniel GARCÍA-FERNÁNDEZ on 18 Jul 2017 at 14:30
Session: High Light Talks
Hadronic interaction models play an important role in UHECR observations. Since 2015, the Large Hadron Collider (LHC) provides proton-proton collisions at the center-of-mass collision energy of 13 TeV, which is equivalent to 0.9x10^17 eV in the laboratory frame. The LHC forward (LHCf) experiment is an LHC experiment designed to provide critical data for testing models with measurements of very for ... More
Presented by Hiroaki MENJO on 13 Jul 2017 at 11:40
Galactic cosmic rays are believed to be accelerated at supernova remnant shocks. We model the dynamical evolution of type I and type II supernova remnants, and discuss how the maximum energy of accelerated protons and electrons is expected to evolve in time. In particular, we discuss whether supernova remnants can accelerate protons all the way up to PeV energies, and the crucial role of of magnet ... More
Presented by Daniele GAGGERO on 14 Jul 2017 at 17:45
The approach to cosmic ray (CR) study with reflected optical Vavilov-Cherenkov radiation (“Cherenkov light”) was proposed long ago. At present the SPHERE-2 detector is the only existing apparatus that have detected a significant sample of extensive air showers (EAS) by means of this method. At the same time the recorded data allows detailed reconstruction of EAS lateral distribution function ( ... More
Presented by Dmitry PODGRUDKOV on 19 Jul 2017 at 14:00
Session: Poster & Coffee
Board #: 110
The LOFAR Radboud Air Shower Array (LORA) consists of 20 plastic scintillators and is situated at the core of the LOFAR radio telescope. LORA detects particles from extensive air showers and triggers the read-out of the LOFAR antennas. The dense LOFAR antenna spacing allows for detailed sampling of the radio emission generated in extensive air showers, which yields high precision reconstruction of ... More
Presented by Katharine MULREY on 18 Jul 2017 at 15:00
Ultra high energy cosmic ray chemical composition is important to resolving questions about the locations of UHECR sources and propagation models. Because composition can only be deduced by a process of statistical inference via the observation of air shower maxima ($X_{ m max}$), UHECR observatories with large data collection rates must be employed to reduce statistical fluctuations. Telescope Ar ... More
Presented by William HANLON on 18 Jul 2017 at 17:00
The LOw Frequency ARay (LOFAR) is a multipurpose radio antenna array aimed to detect radio signals in the frequency range 10-240 MHz, covering a large surface in Northern Europe with a higher density in the Netherlands. The high number density of radio antennas at the LOFAR core in Northern Netherlands allows to detect radio signals emitted by cosmic-ray induced air showers in the energy range 10^ ... More
Presented by Laura ROSSETTO on 13 Jul 2017 at 17:00
The Telescope Array (TA) is a hybrid cosmic ray detector using air fluorescence detectors (FDs) and an array of surface detectors (SDs) which covers 700km^2 in Utah. The TA Low-energy Extension (TALE) also consists of FDs with larger elevation angles and an infill SD array with 400m spacing, which extends the observable energy range down to 4 PeV. In this talk we will present the spectrum from the ... More
Presented by Yoshiki TSUNESADA on 19 Jul 2017 at 16:30
We report on a cosmic ray energy spectrum measurement by the Telescope Array Low-Energy extension (TALE) air fluorescence detector {FD). This spectrum exhibits two features, the second knee in the lower part of the 10^17 eV decade, and a hardening in the lower part of the 10^16 eV decade. The energies of these features, for the first time, are tied to the energy scale of fluorescence detectors of ... More
Presented by Tareq ABUZAYYAD on 19 Jul 2017 at 14:45
Session: Poster & Coffee
Board #: 152
We report on a cosmic ray energy spectrum measurement by the Telescope Array Low-Energy extension (TALE) air fluorescence detector {FD). This spectrum exhibits two features, the second knee in the lower part of the 10^17 eV decade, and a hardening in the lower part of the 10^16 eV decade. The energies of these features, for the first time, are tied to the energy scale of fluorescence detectors of ... More
Presented by Tareq ABUZAYYAD on 18 Jul 2017 at 15:00
Session: High Light Talks
TUS (Tracking Ultraviolet Set-up) is the first orbital detector of extreme energy cosmic rays. It was launched into orbit on April 28, 2016, as a part of the scientific payload of the Lomonosov satellite. The main aim of the mission is to test the technique of measuring UV fluorescent and Cherenkov radiation of extensive air showers (EAS) generated by primary cosmic rays with energies above ~50 Ee ... More
Presented by Pavel KLIMOV on 13 Jul 2017 at 11:20
KLYPVE-EUSO is a mission led by the Russian Space Agency to place an ultra-high energy cosmic ray observatory on board the Russian Segment (RS) of the ISS. The concept of the detector is based on the mirror-type detector proposed by SINP MSU in 2010 and improved by the joint studies with the JEM-EUSO collaboration. The current configuration is based on a Schmidt type optical system. This allows to ... More
Presented by Pavel KLIMOV on 15 Jul 2017 at 17:45
Session: Poster & Coffee
Board #: 010
For measurements Cherenkov light produced by EAS is proposed to use a ground network of wide-angle telescopes which are separated from each other by a distance 100-300 m depending on the total number of telescopes operating in the coincidence signals, acting autonomously, or includes a detector of the charged components, radio waves, etc. as part of EAS. In a results such array could developed, en ... More
Presented by Lev TIMOFEEV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 136
KLYPVE-EUSO is a recent modification of the mirror-type UHECR space observatory for the Russian Segment of the ISS proposed by SINP MSU in 2010, which was developed by the JEM-EUSO collaboration. A Schmidt type optical scheme was adopted in 2016 as a baseline solution, doubling the exposure of the detector. The focal surface (slightly convex), uses the same Hamamatsu M64 PMTs already used in EUSO- ... More
Presented by Pavel KLIMOV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 141
Mini-EUSO is a UV telescope which is developed by the JEM-EUSO collaboration to be placed on board the ISS to carry out measurements of UV atmosphere airglow and transient luminous events in a wide field of view (~40 degrees) and high temporal resolution (2.5 us). Mini-EUSO is developed to be a space qualified pathfinder of future JEM-EUSO missions. Optical system of the detector consists of two F ... More
Presented by Pavel KLIMOV on 18 Jul 2017 at 15:00
The standard analytical model for gamma-ray burst (GRB) afterglows is that they are produced by power-law electron distributions emitting synchrotron, and synchrotron self-Compton, radiation. These electrons, in turn, are produced by highly relativistic shocks sweeping up low-magnetization plasma from the circumburst environment. In this scenario, plasma instabilities develop upstream from the sho ... More
Presented by Donald WARREN
The standard analytical model for gamma-ray burst (GRB) afterglows is that they are produced by power-law electron distributions emitting synchrotron, and synchrotron self-Compton, radiation. These electrons, in turn, are produced by highly relativistic shocks sweeping up low-magnetization plasma from the circumburst environment. In this scenario, plasma instabilities develop upstream from the sho ... More
Presented by Donald WARREN on 18 Jul 2017 at 14:45
Session: Poster & Coffee
Board #: 095
Mini-EUSO will observe Earth night side atmosphere from ISS in the UV spectrum/light. The observed light consists mainly of light produced by airglow. We investigate the feasibility to observe airglow dynamics by Mini-EUSO detector. The investigation focuses on observability of two effects. Firstly on possibility to detect patterns created by atmospheric gravity waves induced by tsunami waves. Sec ... More
Presented by Pavol BOBIK on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 083
We will report setup and calibration of the instruments of sFLASH. The sFLASH experiment is a measurement air fluorescence from ~10^18 eV artificial air showers of an electron beam provided from End Station A of the Stanford Linear Accelerator Center (SLAC) with measurement instruments; a set of Photomultiplier tubes (PMTs) to detect fluorescence photons and Integrating Charge Transformer (ICT) to ... More
Presented by Bokkyun SHIN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 070
The International Cosmic Day (ICD) brings together different astroparticle-physics outreach projects from all over the world. Groups of scientists, teachers, and students meet for one day to learn about cosmic rays and perform an experiment with atmospheric muons. All participating groups investigate the same question. The students are enabled to work together like in an international collaboratio ... More
Presented by Timo KARG on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 099
The cosmic ray knee is generally understood as marking the limiting energy of galactic accelerators and/or the onset of increasing outflow of particles from the galaxy. Detailed measurements of the cosmic ray composition are needed to support this prediction. The model and detector systematics of these measurements can be reduced with shower-by-shower based measurements employing independent detec ... More
Presented by Jan AUFFENBERG on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 069
EAS thermal neutrons measurement gives additional valuable advantages to study energy and mass composition of primary cosmic rays especially above the knee region. After success of the PRISMA-YBJ experiment we built a new EAS thermal neutron detection array at Tibet University, Lhasa, China (3700m a.s.l.) in March, 2017. This prototype array consists of 16 EAS en-detectors measuring two main EAS c ... More
Presented by Shaohui FENG, Xinhua MA on 18 Jul 2017 at 15:00
We present a new parametrisation of the cosmic-ray flux and its mass composition over an energy range from 10 GeV to 10^11 GeV. Our approach is data-driven and relies on theoretical assumptions as little as possible. We combine measurements of the flux of individual elements from high-precision satellites and balloon experiments with indirect measurements of mass groups from the leading air shower ... More
Presented by Hans DEMBINSKI on 19 Jul 2017 at 14:45
Session: Poster & Coffee
Board #: 067
The LOw Frequency ARay (LOFAR) observatory is a multipurpose radio antenna array aimed to detect radio signals in the frequency range 10-240 MHz. Radio antennas are clustered into over 50 stations, and are spread along central and northern Europe, with a higher density in the northern Netherlands. The LOFAR core, where the density of stations is highest, has been used since 2011 for detecting radi ... More
Presented by Antonio BONARDI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 004
A fast registration system for a neutron monitor (NM) is developed in PGI. It records to a file time of neutron coming into NM with accuracy 1 mcs. The number of NM tube is fixed too. So the output data consist of exact time and generation place each of billion pulses of NM. The system is set on a row of NMs (Spitsbergen, Apatity, Moscow and Northern Caucasus). It is used in studying of multiplici ... More
Presented by Yury BALABIN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 003
Variations of gamma-rays (20 keV – 5 MeV) coming from the atmosphere to the surface level are studied in PGI since 2009 on the station: Barentsburg (arch. Spitsbergen, 78 N), Apatity (Polar cycle, foothills of the Khibiny mountains, 67 N), Rostov-on-Don (plain, 47 N). Detectors are shielded by lead from environment and opened to top. There are two variation kinds: annual and sporadic. The annual ... More
Presented by Yury BALABIN on 18 Jul 2017 at 15:00
In order to model the magnetic field amplification and particle acceleration that takes place in astrophysical shocks, we need a code that can efficiently model the large-scale structure of the shock, while still taking the kinetic aspect of non-thermal particles into account. Starting from the proven MPI-AMRVAC magnetohydrodynamics code we have created a code that combines the kinetic treatment o ... More
Presented by Allard Jan VAN MARLE on 14 Jul 2017 at 17:15
Session: Poster & Coffee
Board #: 145
The broad-band X-ray observations of the youngest known galactic supernova remnant, G1.9+0.3, provide unique information about the particle acceleration at the early stages of evolution of supernova remnants. Based on the publicly available X-ray data obtained with the Chandra and NuSTAR satellites over two decades in energy, we derived the energy distribution of relativistic electrons under the a ... More
Presented by Ruizhi YANG on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 090
The IceCube Neutrino Observatory at the South Pole has also been probing the high energy cosmic ray sky by investigating the muonic and electromagnetic component of air showers measured with IceTop and the in-ice detector. However, more detailed measurements are needed to understand the astrophysics of the high-energy cosmic-ray sky. This, along with the need to mitigate the impact of snow accumul ... More
Presented by Samridha KUNWAR on 18 Jul 2017 at 15:00
The spatial signal distribution of the radio frequency radiation from extensive air showers on the ground contains information of crucial cosmic-ray properties, such as energy and mass. A long standing challenge to access this information experimentally with a sparse grid of antennas is an analytic modeling of the radio signal distribution, which will be addressed in this contribution. We present ... More
Presented by Christian GLASER on 17 Jul 2017 at 14:30
Coherent radio signals in the MHz range are emitted from extensive air showers initiated by high-energy cosmic rays. Observing this emission enables precise measurement of the energy of the primary particle. Compared with those made with the well-established fluorescence technique, radio measurements are less dependent on atmospheric conditions, and thus offer the potential of energy determination ... More
Presented by Raphael KRAUSE on 13 Jul 2017 at 14:45
Session: Poster & Coffee
Board #: 173
Coherent radio signals in the MHz range are emitted from extensive air showers initiated by high-energy cosmic rays. Observing this emission enables precise measurement of the energy of the primary particle. Compared with those made with the well-established fluorescence technique, radio measurements are less dependent on atmospheric conditions, and thus offer the potential of energy determination ... More
Presented by Raphael KRAUSE on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 183
Different type of mechanisms are involved in generation and propagation of radio signals from cosmic ray air showers. The geomagnetic origin is one of such procedures which is very important especially in low frequency band radio studies. Based on CORSIKA and CoREAS code we investigate the influence of the Earth magnetic field parameter on filtered peak radio amplitude patterns in 32–64 MHz freq ... More
Presented by Mohammad SABOUHI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 182
It is possible to determine key parameters of a cosmic ray air shower from different approaches. One of the most important elements of an air shower is the place where the shower axis hits the ground, the shower core. Determining the position of this component can result in calculating other important characteristics including the propagation direction. In this study and based on CORSIKA and COREA ... More
Presented by Mohammad SABOUHI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 169
The TUS experiment is designed to investigate the ultra high energy cosmic ray (UHECR) at energy ~ 100 EeV from the space orbit by the UV radiation measurement of extensive air showers (EAS). It was launched on board the “Lomonosov” satellite from the Vostochny Cosmodrome on April 28, 2016 for 5 years of data taking. It is the first orbital telescope aimed for such measurements. The main mode ... More
Presented by Leonid TKACHEV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 184
Supernovae occurring in dense winds are promising candidates for particle acceleration to high energies. We focus here on the onset of particle acceleration, during the first couple of days following core-collapse. We show that a collisionless shock rapidly forms at supernova shock breakout. We calculate, for the first time, the maximum CR energy that can be reached with Bell's non-resonant hybrid ... More
Presented by Gwenael GIACINTI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 120
The Tunka Radio Extension (Tunka-Rex) is an array of 63 antennas located in the Tunka Valley, Siberia. It detects radio pulses in the 30-80 MHz band produced during the air-shower development. As shown by Tunka-Rex, a sparse radio array with about 200 m spacing is able to reconstruct the energy and the depth of the shower maximum with satisfactory precision using simple methods based on parameters ... More
Presented by Dmitriy KOSTUNIN on 18 Jul 2017 at 15:00
Session: High Light Talks
The interpretation of EAS measurements strongly depends on detailed air shower simulations. CORSIKA is one of the most commonly used air shower Monte Carlo program. The main source of uncertainty in the prediction of shower observables for different primary particles and energies being currently dominated by differences between hadronic interaction models even after the update taking into account ... More
Presented by Tanguy PIEROG on 18 Jul 2017 at 11:00
Session: Poster & Coffee
Board #: 150
The H.E.S.S. experiment has shown its capabilities to measure the cosmic ray electron spectrum up to the TeV regime in the past and to unveil spectral features like the break at ~1 TeV. Besides the electron spectrum itself, also the anisotropy in the electron's arrival directions is of high interest, since it could offer the unique possibility to distinguish between the scenario of local electron ... More
Presented by Manuel KRAUS on 18 Jul 2017 at 15:00
The ARIANNA experiment is designed to measure the radio emission created by neutrinos (> 10^16 eV) interacting in the Antarctic ice. The detection is achieved by installing high gain log-periodic dipole antennas just below the surface, which record the radio pulses. The current design foresees more than 1000 independent radio detection stations with a spacing of at least one kilometer. The ARIANNA ... More
Presented by Anna NELLES
Session: Poster & Coffee
Board #: 167
We present a method of identifying bright sources of ultra-high energy cosmic rays (UHECRs) embedded in a diffuse background flux by studying UHECR arrival directions. The technique is applicable to sources that produce several observed events, which exhibit energy ordering in their arrival directions due to coherent deflections caused by the regular component of the Galactic magnetic field. We qu ... More
Presented by Foteini OIKONOMOU on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 170
The Telescope Array experiment (TA) is the largest cosmic-ray detector in the northern hemisphere and consists of a surface detector (SD) array, plus three fluorescence detector (FD) stations overlooking the SD. The large field-of-view of a FD allows for reconstruction of the air-shower development in the atmosphere by imaging ultra-violet fluorescence light from atmospheric nitrogen excited by UH ... More
Presented by Toshihiro FUJII on 18 Jul 2017 at 15:00
Sound knowledge of the aerosol loading in the atmosphere above the Pierre Auger Observatory is essential for the accurate reconstruction of shower energy deposit profiles using the atmospheric fluorescence technique. The vertical aerosol optical depth is inferred via two complementary techniques from hourly measurements of the vertically-fired UV laser beam of the Observatory’s central laser fac ... More
Presented by Max MALACARI on 15 Jul 2017 at 18:00
Session: Poster & Coffee
Board #: 042
Ground arrays for ultra-high energy cosmic ray detection based on water-Cherenkov stations or scintillator modules are unavoidably limited by the saturation suffered by the counters closest to the shower axis. Reducing to a negligible level the amount of events with saturated detectors is mandatory to unambiguously record the highest energy events and to decrease the systematic uncertainties affec ... More
Presented by Antonella CASTELLINA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 033
The extensive air showers created by highly energetic cosmic rays are measured at the Pierre Auger Observatory. The development of these air showers in the dynamic medium of the Earth's atmosphere affects the reconstruction and ultimately the determination of the energy for the primary particle. We present an analysis using data from the two surface detector arrays (with 750m and 1500m spacing) wh ... More
Presented by Alan COLEMAN on 18 Jul 2017 at 15:00
We report an anisotropy in the flux of cosmic rays with energies above 8 EeV observed using data recorded at the Pierre Auger Observatory with more than 12 yr of operation. We consider events with zenith angles up to 80°, so that 85% of the sky is observed, and for energies in excess of 4 EeV, for which the Observatory is fully efficient. An analysis of the first harmonic in right ascension is pe ... More
Presented by Oscar Alejandro TABORDA PULGARIN on 17 Jul 2017 at 16:30
Session: Poster & Coffee
Board #: 134
The Auger Muon and Infill Ground Array (AMIGA) is a muon detector that is currently being built as part of AugerPrime, the upgrade of the Pierre Auger Observatory. It consists of 30 m^2 plastic scintillator counters buried 2.3 m underground and water-Cherenkov detectors at the surface, organized in a periodic 750 m triangular array, and deployed over an area of 23.5 km^2. Two positions of the engi ... More
Presented by Juan Manuel FIGUEIRA on 18 Jul 2017 at 15:00
The Auger-TA composition working group will report on a comparison of Xmax distributions measured by the Pierre Auger and Telescope Array Observatories. We will evaluate whether the shapes of the Auger and TA Xmax distributions are statistically compatible and whether the distribution modes are within the quoted systematic uncertainties. A direct comparison of the measured Xmax distributions is no ... More
Presented by Vitor DE SOUZA on 18 Jul 2017 at 14:45
Session: Poster & Coffee
Board #: 041
Since 2007 the Telescope Array Project (TA) and Pierre Auger Observatory (Auger) have collected extensive data sets spanning several orders of magnitude of the cosmic-ray spectrum. In both experiments the majority of data is generated from the surface-detector (SD) array as a result of its very high duty cycle. These data are then calibrated for energy with fluorescence-detectors using a hybrid ap ... More
Presented by Sean QUINN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 034
In recent years, there has been rapid advances in the field of radio detection of high-energy cosmic ray induced air showers. Estimating the depth of shower maximum Xmax with improved accuracy is of great interest for the study of primary particle composition. One of the major systematic uncertainties in the Xmax-measurement arises from variations of the refractive index in the atmosphere. The ref ... More
Presented by Pragati MITRA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 007
At LOFAR we measure the radio emission from extensive air showers (EAS) in the frequency band of 30-80 MHz in dual-polarized antennas. Through an accurate antenna calibration we can determine the complete set of four Stokes parameters that uniquely determine the linear and/or circular polarization of the radio signal for an EAS. The observed dependency of the circular polarization on azimuth angle ... More
Presented by Olaf SCHOLTEN on 18 Jul 2017 at 15:00
Session: High Light Talks
The Telescope Array measures the properties of ultra high energy cosmic ray induced extensive air showers. We do this using a variety of techniques including utilizing an array of scintillator detectors to sample the footprint of the air shower when it reaches the Earth’s surface and telescopes to measure the fluorescence and Cerenkov light of the air shower. From this we determine the energy sp ... More
Presented by John MATTHEWS on 17 Jul 2017 at 10:30
Session: Poster & Coffee
Board #: 159
Telescope Array (TA) is the largest cosmic ray detector in the Northern hemisphere, initially designed to study ultra high energy cosmic rays of energies above 10^18 eV. The Telescope Array Low-energy Extension (TALE) extends the sensitivity of TA down to 10^15.8 eV. The original TA consists of three fluorescence detectors, viewing 3 to 30 degrees in elevation each, and overlooking an array of sci ... More
Presented by JiHee KIM on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 116
The High-Altitude Water Cherenkov experiment (HAWC) is a gamma-ray observatory operating in the 1-100 TeV energy range. It is located 4100 meters above sea level, and consists of an array of 300 water Cherenkov detectors. These detectors have photomultiplier tubes to detect secondary particles from extensive air showers (EAS) initiated in the interaction of a primary particle (either a gamma or a ... More
Presented by Tomäs CAPISTRÄN ROJAS, Ibrahim Daniel TORRES AGUILAR on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 089
The High Altitude Water Cherenkov (HAWC) Observatory is used for detecting TeV gamma rays. HAWC is operating at 4,100 meters above level sea on the slope of the Sierra Negra Volcano in the State of Puebla, Mexico, and consists of an array of 300 water Cherenkov detectors (WCDs) covering an area of 22,000 m2. Each WCD is equipped with four photomultiplier tubes (PMTs) to detect Cherenkov emission i ... More
Presented by Eduardo MORENO BARBOSA, Tomás CAPISTRÁN ROJAS on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 038
The determination of the mass composition of ultrahigh-energy cosmic rays remains one of the biggest challenges of astroparticle physics. We will show that the paradigm of shower universality can be applied to accurately reconstruct the properties of air showers, which includes information about the primary mass. The reconstruction is based solely on data from the Auger surface detector, which ope ... More
Presented by Ariel BRIDGEMAN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 160
As the particle lateral density distribution of extensive air showers (EAS) is the key quantity for most cosmic-ray ground-based experiments, the lateral distribution function (LDF) of EAS plays an important role in the analysis of the air-shower events, including the reconstruction of air shower size and the lateral shower age, etc., which are closely correlated with the energy resolution and the ... More
Presented by LIUMING ZHAI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 178
The energy spectrum of the cosmic radiation in the range 10**19-2.4x10**21 eV has been recently predicted showing a rich and distinctive staircase profile. In order to check the prediction, the spectra measured by running and past experiments above 10**19 eV are examined. The computed spectrum compares more favourably with the Telescope Array data rather than with the Auger data in the range 10**1 ... More
Presented by Antonio CODINO on 18 Jul 2017 at 15:00
We present a new method of searching for origins of ultra‐high energy cosmic rays directly from observed data. We include corrections for deflections in the galactic magnetic field according to the individual cosmic ray charges. The analysis procedure is iterative and consists of the following steps. Initially, we assign to each cosmic ray a charge hypothesis and apply corresponding corrections ... More
Presented by Martin URBAN on 18 Jul 2017 at 13:30
Session: Poster & Coffee
Board #: 117
The scale and scope of the physics studied at the Pierre Auger Observatory continue to offer significant opportunities for original outreach work. Education, outreach and public relations of the Auger Collaboration are coordinated in a separate task whose goals are to encourage and support a wide range of education and outreach efforts that link schools and the public with the Auger scientists and ... More
Presented by Charles TIMMERMANS on 18 Jul 2017 at 15:00
We report on radio frequency measurements of the electron beam sudden appearance signal from the Telescope Array Electron Light Source (TA-ELS). The TA-ELS is constructed to calibrate the Telescope Array fluorescence telescope, and as such it can be used to mimic a cosmic-ray or neutrino induced particle cascade. This makes the TA-ELS the perfect facility to study new detection techniques such as ... More
Presented by Krijn D. DE VRIES on 18 Jul 2017 at 17:00
Session: Poster & Coffee
Board #: 122
As part of the upgrade of the Pierre Auger Observatory, called AugerPrime, scintillator detectors will be mounted on top of all water-Cherenkov detectors (WCDs) of the air shower array. By combining the data from WCDs with those of scintillator surface detectors (SSDs), we can derive information needed to reconstruct the energy and composition of cosmic rays at energies higher than those reached b ... More
Presented by Radomir SMIDA on 18 Jul 2017 at 15:00
Two hybrid analyses using air shower events recorded by both the Surface Detector Array (SD) and the Fluorescence Detector (FD) of the Pierre Auger Observatory are presented. In the first analysis, a search for a diffuse flux of photons with energies above 10^18 eV = 1 EeV is performed. An unprecedented separation power between photon and hadron primaries is achieved through combining observables ... More
Presented by Marcus NIECHCIOL on 18 Jul 2017 at 16:30
The GeV-TeV gamma-rays and the PeV-EeV neutrino backgrounds provide a unique window on the nature of the ultra-high-energy cosmic-ray (UHECR). We discuss the implications of the recent Fermi-LAT data regarding the extragalactic gamma-ray background (EGB) and related estimates of the contribution of point sources as well as IceCube neutrino data on the origin of the ultra-high-energy cosmic-ray (UH ... More
Presented by Noemie GLOBUS on 18 Jul 2017 at 13:45
Session: Poster & Coffee
Board #: 027
The Large Hadron Collider forward (LHCf) experiment is designed to measure the particles emitted in very forward region at LHC. Forward particle production in the hadronic interactions is one of the crucial points to understand the development of cosmic-ray air showers. We report the neutron energy spectra measured by the LHCf at LHC √s=13TeV proton-proton collisions in the pseudo-rapidity range ... More
Presented by Mana UENO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 140
We present the opto-mechanical design of a new generation fluorescence telescope for the detection of ultrahigh-energy cosmic rays (UHECRs). The Fluorescence detector Array of Single-pixel Telescopes (FAST) is a proposed low-cost, large-area, next-generation experiment for the detection of UHECRs via the atmospheric fluorescence technique. The telescope is of a simplified Schmidt design, suitable ... More
Presented by Dusan MANDAT on 18 Jul 2017 at 15:00
As the flux of ultra-high-energy cosmic-rays (UHECR) is very low, detectors with a large effective area and high duty cycle are needed. Radio detection of extensive air showers (EAS) presents attractive aspects for future experiments, with very low cost per detector unit, easiness of deployment over large areas and close to 100% duty cycle. More research and development on radio detection is ongoi ... More
Presented by Quanbu GOU on 14 Jul 2017 at 14:15
Session: Poster & Coffee
Board #: 020
Large Area Air Shower (LAAS) group has studied cosmic ray phenomena by using compact extensive air shower (EAS) arrays since 1996. In Okayama University of Science, which is a member of LAAS group, the observation of the primary energy spectrum in its energy region above10^16 eV has been carried out with the array and the Linsley's method. We report on the simulation study of the relocation of an ... More
Presented by Atsushi IYONO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 194
The radiographic (tomographic) analyses with atmospheric muons are applied to the inner-structure investigations of various objects, e.g. geophysical substances like volcanic mountains, large-volume rock structure like pyramids, inaccessible cores of the damaged nuclear reactors, and others. Precise evaluations of transmission efficiency for penetrating muons are important for these radiographic m ... More
Presented by Saya YAMAMOTO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 193
Muon radiographic (tomographic)techniques are applied to inspect the dense structures of matter. To investigate transmission properties of muon, we applied analytical methods developed in the cascade shower theory. The cascade functions for muon characterized by bremsstrahlung and positron-electron pair production are proposed instead of usual functions described for electrons. The results derived ... More
Presented by Saya YAMAMOTO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 176
The energy spectrum and mass composition of Ultra-High Energy Cosmic Rays (UHECRs) measured by Telescope Array (TA) will be presented. TA is the largest UHECR observatory in the northern hemisphere, located in the west desert of Utah, USA. It consists of 507 Surface Detectors (SDs) and three fluorescence detectors (FDs) to observe UHECRs by those two types of detectors simultaneously, in so called ... More
Presented by Daisuke IKEDA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 163
IceTop, the surface component of IceCube Neutrino Observatory detects extensive air showers (EAS) initiated by cosmic rays and gamma rays in the energy range of PeV to EeV. The characteristics of shower front, as sampled by IceTop, such as muon content, local fluctuations and shower front curvature, correlate with the mass of the primary particle for a given energy and arrival direction. Using Ice ... More
Presented by Hershal PANDYA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 017
We present Halpha spectroscopic observations and detailed modelling of Balmer filaments in the northeastern rim of Tycho's supernova remnant. Balmer filaments are bright sheets of shocked gas seen edge-on that trace collisionless, non-radiative forward shock which propagates in partially ionized medium. Collisional excitations of unshocked neutral hydrogen and charge-exchange processes between sho ... More
Presented by Sladjana KNEZEVIC on 18 Jul 2017 at 15:00
Evidence of an energy dependent intermediate-scale anisotropy has been found in the arrival directions of ultra-high energy cosmic rays in the northern hemisphere, using 7 years of TA surface detector data. The previously reported “hot spot" excess E ≥ 10^19.75 EeV is found to correspond to a deficit, or “cold spot," of events for 10^19.2 ≤ E < 10^19.75 EeV. This feature suggests energy de ... More
Presented by Jon Paul LUNDQUIST on 18 Jul 2017 at 18:00
Session: Poster & Coffee
Board #: 129
Tunka-Rex (Tunka Radio Extension) is an antenna array for cosmic-ray detection located in Siberia. Previous studies of cosmic rays with Tunka-Rex have shown high precision in determining the energy of the primary particle and the possibility to reconstruct the depth of the shower maximum. The next step is the reconstruction of the mass composition and the energy spectrum of cosmic rays. One of the ... More
Presented by Oleg FEDOROV on 18 Jul 2017 at 15:00
The HAWC (High Altitude Water Cherenkov) gamma ray observatory can detect muons with nearly horizontal trajectories. HAWC is located at an altitude of 4100 meters a.s.l. on Sierra Negra in Mexico, and is composed of 300 water tanks, each 7.3 m in diameter and 4.5 m deep, densely packed over a physical area of approximately 22,000 m2. Previous and current experiments have observed high zenith angle ... More
Presented by Wayne SPRINGER on 17 Jul 2017 at 17:00
Session: Poster & Coffee
Board #: 151
The HAWC (High Altitude Water Cherenkov) gamma ray observatory observes muons with near-horizontal trajectories corresponding to zenith angles greater than 75 degrees. HAWC is located at an altitude of 4100 meters a.s.l. on the extinct volcano, Sierra Negra in Mexico. In this poster, we will summarize the CORSIKA-based simulations used to determine the effective area and sensitivity of HAWC to muo ... More
Presented by Wayne SPRINGER on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 177
We present the energy spectrum of ultra-high-energy cosmic rays (UHECRs) observed by the detectors of the Telescope Array experiment. The broken power law to the spectrum contains two break points, a flattening known as the "ankle" or "dip" at E = 10^{18.7} eV, and a steepening at E = 10^{19.8} eV. These spectral features are related to the distribution of cosmic-ray sources, their injection spect ... More
Presented by Eiji KIDO on 18 Jul 2017 at 15:00
The Telescope Array (TA) experiment consists of a surface detector (SD) array covering 700 km^2 in area and three fluorescence detector (FD) stations, and explores the origin of ultra-high-energy cosmic rays. We found evidence for a hotspot in the arrival directions of cosmic rays with energies above 57 EeV (Abbasi et al. 2014). New SDs and FDs are planned to be constructed for the TAx4 experiment ... More
Presented by Eiji KIDO on 15 Jul 2017 at 18:15
Session: Poster & Coffee
Board #: 084
The Latin American Giant Observatory (LAGO) is an extended astroparticle observatory with the goal of studying Gamma Ray Burst (among other extreme universe phenomena), space weather and atmospheric radiation at ground level. It consists of a network of several Water Cherenkov Detectors (WCD) located at different sites and different latitudes along the American Continent (from Mexico up to the Ant ... More
Presented by Karen Salomé CABALLERO MORA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 075
The EUSO-SPB (Extreme Universe Space Observatory on a Super Pressure Balloon) is a balloon borne UV camera. It is dedicated to the observation of fluorescent light produced by UHECR induced air showers from the stratosphere. EUSO-SPB was lauched on the 24th of April 2017, 22:50 UTC and laster for 12 days 12 hours at a nominal altitude of 33.5 km. The main instrument consists of a two Fresnel lens ... More
Presented by Simon BACHOLLE on 18 Jul 2017 at 15:00
The surface detector array of the Pierre Auger Observatory measures the arrival time distribution of particles and therefore provides indirect information on the longitudinal development of the muonic component of extensive air showers. In this work, the depth at which the muon production is maximum and, for the first time, the corresponding shower-to-shower fluctuations, are reconstructed for mor ... More
Presented by Manuela MALLAMACI on 18 Jul 2017 at 17:45
The Pierre Auger Observatory has collected the largest exposure of ultra-high energy cosmic rays over the past decade, providing an unprecedented data set of high quality. The analysis of these data has led to major breakthroughs in the understanding of the origin and properties of the highest-energy cosmic rays, but a coherent interpretation has not yet been achieved. New questions have emerged, ... More
Presented by Daniele MARTELLO on 15 Jul 2017 at 16:30
Session: Poster & Coffee
Board #: 023
The IceCube Neutrino Observatory measures cosmic-ray air showers with both its surface array IceTop and its 1.5-2.5 km deep in-ice array. IceTop measures the charge deposited by electromagnetic particles and low-energy muons. The abundant electromagnetic component determines the primary energy of the cosmic ray, while the low-energy muons, visible at the edge of the shower, add a sensitivity to th ... More
Presented by Tom GAISSER on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 119
Photomultiplier Tubes (PMT) is mostly used in air Cherenkov light detection in extensive air shower of cosmic rays. The Cherenkov telescopes work at clear and moonless nights, therefore it is susceptible to the background of stars in the sky. Because Earth’s rotation and revolution, the night-sky background (NSB) would changes a lot at different seasons and even at one night. In this case, we co ... More
Presented by LiQiao YIN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 118
LHAASO (Large High Altitude Air Shower Observatory) is a composite cosmic ray observatory consisting of three types of detectors: KM2A, WCDA and WFCTA. One of the main scientific objectives of LHAASO is to accurately measure the cosmic ray spectrum and composition. With hybrid detection of WCDA and WFCTA, one can further study the “Knee” of CRs from 100TeV to 10PeV. The components of original ... More
Presented by LiQiao YIN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 175
The Telescope Array (TA) experiment is located in the western desert of Utah, USA, and observes ultra high energy cosmic rays in the northern hemisphere. In the region of highest energies, the shape of cosmic ray energy spectrum may contain information on the source density distribution and chemical composition. In this study, using events observed with Telescope Array surface detector, we search ... More
Presented by Toshiyuki NONAKA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 106
The Water Cherenkov Detector Array (WCDA) is one of the major components of the Large High Altitude Air Shower Observatory (LHAASO). The whole WCDA is subdivided into 3120 detector cells, each has 5x5 m^2 area with an 8 or 9 inch PMT residing in the water at the depth of 4 m. In order to extend the dynamic range of the detector to the energy more than 100 TeV for the cosmic ray spectrum measuremen ... More
Presented by Cheng LIU on 18 Jul 2017 at 15:00
We present shower depth of maximum (Xmax) distributions and their interpretation in terms of the cosmic ray mass composition. The measurements of Xmax are based on data from the fluorescence telescopes of the Pierre Auger Observatory. Due to the extension of the field of view with the High Elevation Auger Telescopes, a lower energy threshold of 10^17.2 eV can be reached. At the highest energies we ... More
Presented by Jose BELLIDO on 18 Jul 2017 at 17:15
Session: Poster & Coffee
Board #: 174
After the discovery of the gravitational waves and the observation of neutrinos of cosmic origin, we have entered a new and exciting era where cosmic rays, neutrinos, photons and gravitational waves will be used simultaneously to study the highest energy phenomena in the Universe. Here we present a fully Bayesian approach to the challenge of combining and comparing the wealth of measurements from ... More
Presented by Guillermo TORRALBA ELIPE on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 085
Unlike Imaging Atmospheric Cherenkov Telescopes (IACTs), Extensive Air Shower (EAS) arrays can observe cosmic rays with wide fields of view of about 2 sr and with duty cycles of almost 24 hours every day regardless of weather conditions or the moonlight. Some EAS arrays are located at high altitudes to lower their observation thresholds of cosmic rays and successfully observe gamma rays in the ran ... More
Presented by Atsushi SHIOMI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 066
We report on the behaviour of Resistive Plate Chambers (RPC) developed for muon detection in ultra-high energy cosmic ray (UHECR) experiments. RPCs were developed for the MARTA project and were tested on field conditions. These RPCs cover an area of 1.5 x 1.2 m^2 and are instrumented with 64 pickup electrodes providing a segmentation better than 20cm. By shielding the detector units with enough sl ... More
Presented by Ruben CONCEIÇÃO on 18 Jul 2017 at 15:00
We present simulations of the propagation of ultra-high energy cosmic rays (UHECR) in three-dimensional space, including realistic assumptions about the extragalactic magnetic field (EGMF) and taking into account the cosmological evolution of the universe as well as interactions of the UHECR with the extragalactic background light (EBL). On this basis, we study which energy spectrum and chemical c ... More
Presented by David WITTKOWSKI on 19 Jul 2017 at 14:00
Session: Poster & Coffee
Board #: 091
Four multianode photomultipliers (Elementary Cell unit) are powered by one high voltage generator. HV control system for Photo Detection Module consists of 9 high voltage generators. HV generators are Cockcroft-Walton voltage multipliers with protection system and with 3 level very fast switches for HV at cathodes. Protection systems were made to protect HVPS itself against possible excess of powe ... More
Presented by Zbigniew PLEBANIAK on 18 Jul 2017 at 15:00
The H.E.S.S. experiment has collected data for more than 10 years. Despite its design for gamma-ray astronomy, H.E.S.S. already demonstrated in the past its ability to measure the cosmic-ray electron spectrum above a few hundred GeV. Since this first measurement, new observations have increased the amount of available data for such an analysis by more than a factor of four. Furthermore, with a new ... More
Presented by Daniel KERSZBERG on 19 Jul 2017 at 14:30
Generalized scaling formalism has been implemented in the analysis of lateral distributions of EAS charged particles measured by Tunka-Grande array. It is shown that using lateral scale factor as another  primary mass indicator measured by scintillation counters with high duty cycle is potentially effective for reaching more reliable estimations of mass composition in the energy range $10^{16}div ... More
Presented by L.G. SVESHNIKOVA
Session: Poster & Coffee
Board #: 001
We investigate the universality property of air shower development expressed by the relation between the radial scale factor and the longitudinal age parameter. With new CORSIKA simulation results we show that this property allows improved mass composition studies and hadronic interactions models tests within the sole approach in wide primary energy range (from sub-knee up to the cut-off energies) ... More
Presented by Naoya INOUE on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 102
The Latin American Giant Observatory (LAGO) is a cosmic ray observatory at regional scale, consisting of a wide network of water Cherenkov detectors (WCDs) located at several sites in ten Latin American countries. One of the main academic objectives of LAGO is to support the development of astroparticle physics in Latin America. The decay time of atmospheric muons can be measured from data collect ... More
Presented by Luis OTINIANO on 18 Jul 2017 at 15:00
We present a description of the new Tien-Shan complex installation for investigation of various fundamental and applied problems in different fields of the astroparticle, atmospheric and environmental physics. The principal design of the detector complex is based on simultaneous registration of electromagnetic, muonic and hadron components of the cosmic ray showers. We discuss all the settings for ... More
Presented by Vladimir RYABOV on 18 Jul 2017 at 18:15
Session: Poster & Coffee
Board #: 025
High-energy atmospheric muons can yield information about the prompt contribution to atmospheric lepton fluxes. Relevant to studying the flux of astrophysical neutrinos, this also complements results from collider experiments in the forward region. A machine-learning based selection has been developed, identifying high-energy (E_{mu} ~> 1 TeV) leading muons which dominate the energy losses detecte ... More
Presented by Frederik TENHOLT on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 198
Purpose. When ultra-high-energy cosmic rays (UHECRs) travel through the universe they produce secondary neutrinos as well as photons, electrons and positrons (initiating electromagnetic cascades) in different kinds of interactions. These neutrinos and electromagnetic cascades are detected at Earth as isotropic extragalactic fluxes. The level of these fluxes can be directly predicted for any kind o ... More
Presented by Arjen VAN VLIET on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 053
The total area of silicon in cell phone camera sensors worldwide surpasses that in any experiment to date. Based on semi-conductor technology similar to that found in modern astronomical telescopes and particle detectors, these sensors can detect ionizing radiation in addition photons. The Distributed Electronic Cosmic-ray Observatory (DECO) utilizes the global network of active cell phones in ord ... More
Presented by Matthew MEEHAN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 197
Effects of Lorentz invariance violation (LIV) can be present at energies much lower than the quantum gravity scale. Here the possible LIV effects in ultra-high energy cosmic rays (UHECRs) have been investigated. To this aim, modifications of the propagation of UHECR protons and nuclei in the extragalactic space due to LIV effects have been taken into account. For the first time a fit of both flux ... More
Presented by Denise BONCIOLI on 18 Jul 2017 at 15:00
A number of cosmic-ray air shower experiments have determined the anisotropy in the TeV to PeV energy range. The large-scale anisotropy pattern is not a dipole as expected from the standard theory of cosmic-ray transport in interstellar magnetic fields. Rather, it is severely distorted and breaks into smaller structures. This is due to the presence of the heliosphere. To fully understand the cosmi ... More
Presented by Ming ZHANG on 17 Jul 2017 at 14:45
Session: Poster & Coffee
Board #: 026
The KASCADE-Grande observatory was a ground-based air shower array devoted to the study of the energy and composition of cosmic rays with energies from 1 PeV to 1 EeV. The experiment consisted of different detector systems which allowed the simultaneous measurement of distinct components of the air showers (EAS), such as the muon content. In this contribution, we study the total muon number and th ... More
Presented by Juan Carlos ARTEAGA-VELÁZQUEZ on 18 Jul 2017 at 15:00
The High Altitude Water Cherenkov (HAWC) observatory is a ground-based air-shower detector designed to study the TeV gamma and cosmic ray windows. The observatory is composed of a densely packed array of 300 water Cherenkov tanks, 4.5 m deep and 7.3 diameter with 4 photomultipliers (PMT) each, distributed on a 22,000 m2 surface. The instrument registers the number of hit PMT’s as well as the tim ... More
Presented by Juan Carlos ARTEAGA-VELÁZQUEZ on 19 Jul 2017 at 17:15
The elemental energy spectra of cosmic rays play an important role in understanding their acceleration and propagation. Most current results are obtained either from direct measurements by balloon- or satellite-borne detectors, or from indirect measurements by air shower detector arrays on the Earth's surface. Imaging Air Cherenkov Telescopes (IACTs), used primarily for gamma-ray astronomy, can al ... More
Presented by Henrike FLEISCHHACK on 17 Jul 2017 at 18:00
The LOFAR radio telescope measures the radio emission from extended air showers with unprecedented precision. In the dense core individual air showers are detected by hundreds of dipole antennas. By fitting the complicated radiation pattern to Monte Carlo radio simulation codes we obtain measurements of Xmax with a precision of <20 g/cm^2. We present the latest LOFAR results of cosmic-ray mass com ... More
Presented by Stijn BUITINK on 19 Jul 2017 at 17:45
NA61/SHINE is a fixed target experiment designed to study hadron-proton, hadron-nucleus and nucleus-nucleus interactions at the CERN Super-Proton-Synchrotron. We will present results on spectra of identified hadrons produced in pion-carbon production interactions, which are of fundamental importance to improve the extensive air shower modeling, and hence the interpretation of ultra-high-energy-cos ... More
Presented by Raul Ribeiro PRADO on 13 Jul 2017 at 16:30
The Telescope Array and Pierre Auger Collaborations have formed a working group to examine the similarities and differences in their measurements of the spectrum of ultra-high energy cosmic rays. The method chosen is for each experiment to measure the spectrum in the declination band of -15.7 < delta < +24.8 degrees, where both experiments have sensitivity. A second step chosen is to correct for t ... More
Presented by Dmitri IVANOV on 18 Jul 2017 at 16:45
EUSO-TA is an on-ground telescope, located at the Telescope Array (TA) site in Black Rock Mesa, Utah, USA. The main aim of the instrument is the observation of Ultra-High Energy Cosmic Rays through detection of ultraviolet light generated by cosmic-ray air showers. EUSO-TA consists of two, 1 m2 Fresnel lenses with a field of view of about 11x11 degrees. Light is focused on the Photo Detector Modul ... More
Presented by Lech PIOTROWSKI on 13 Jul 2017 at 13:30
Session: Poster & Coffee
Board #: 078
EUSO-TA is an on-ground telescope, located at the Telescope Array (TA) site in Black Rock Mesa, Utah, USA. The main aim of the instrument is the observation of Ultra-High Energy Cosmic Rays through detection of ultraviolet light generated by cosmic-ray air showers. EUSO-TA consists of two, 1 m2 Fresnel lenses with a field of view of about 11x11 degrees. Light is focused on the Photo Detector Modul ... More
Presented by Lech PIOTROWSKI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 077
Mini-EUSO is a telescope that will observe ultra-violet night-time light emission of Earth. It will watch the atmosphere through a UV transparent window of the International Space Station. The main data stream is composed of regularily sampled exposures integrated on three different time scales: microseconds, miliseconds and seconds. These data, together with visible and near infra red images will ... More
Presented by Lech PIOTROWSKI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 187
Interactions of ultra-high-energy cosmic rays with background photons set a limit to the distance cosmic rays reaching us above a certain energy can originate from, making measurements of their fluxes insensitive to properties of sources at high redshifts. On the other hand, the secondary PeV--EeV neutrinos produced in UHECR propagation can reach the Earth even from very high redshifts, and electr ... More
Presented by Armando DI MATTEO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 171
The cosmic ray spectrum at ultra high energies (E > 1 EeV) has two features: the ankle near ~3 EeV and the so-called second break point, at ~60 EeV. If cosmic rays were pure protons at the highest energies, the second break point is explained by the well known Greissen-Zatsepin-Kuz'min process: energy loss of the protons on cosmic microwave background (CMB) due to the photo-pion production. In the ... More
Presented by Dmitri IVANOV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 035
The surface detector (SD) of the Pierre Auger Observatory has collected some very peculiar events. The signals produced by these events in the SD stations are very long-lasting compared to those produced by cosmic rays, but the most peculiar characteristic is the footprint of these events on the SD: the stations with a long signal are arranged in a ring with a radius of about 6 km. For some of the ... More
Presented by Roberta COLALILLO on 18 Jul 2017 at 15:00
The time structure of the signals from air showers, recorded with the water-Cherenkov detectors of the Pierre Auger Observatory, contains information that can be related to the mass composition of primary cosmic rays and to hadronic multi-particle production. We can study both because the recorded signals contain a mix of the muonic and electromagnetic components. Using information from the time s ... More
Presented by Patricia SANCHEZ-LUCAS on 18 Jul 2017 at 17:30
In 2008, a radio signal interpreted as Molecular Bremsstrahlung Radiation (MBR) was detected from electromagnetic showers produced in beam test experiments at SLAC at microwave frequencies. Due to the isotropic nature of MBR and its insensitivity to atmospheric attenuation and light conditions, it would allow the measurement of the shower longitudinal profile with an almost 100% duty cycle compare ... More
Presented by Romain GAIOR on 15 Jul 2017 at 17:30
Session: Poster & Coffee
Board #: 158
The arrival direction distribution of UHECRs is a key element to understand their sources and composition as well the galactic and extragalactic magnetic fields. The particles that arrive on Earth with energies above $sim 50$ EeV must be originated in sources nearby us as a result of the GZK effect. Furthermore, if these particle are protons and the magnetic fields along their propagations until E ... More
Presented by Rogerio DE ALMEIDA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 052
In order to obtain the primary proton, helium and iron spectra and their ``knee" positions with energy up to 10^16 eV, each of PMTs equipped to the water-Cherenkov muon-detector array (MD) cell of Tibet ASγ experiment is required to measure the number of photons capable of covering a wide dynamic range of 100 – 10^6 PEs according to Monte Carlo simulations. However, the dynamic range of each MD ... More
Presented by Ying ZHANG on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 039
The origin of ultra high energy cosmic rays (UHECR) is a long-standing mystery. The aim of the Telescope Array (TA) experiment is to reveal this by observing the spectrum, anisotropy, and composition by utilizing an array of surface detectors (SD) and fluorescence detectors. One of the uncertainties in UHECR observation derives from the hadronic interaction model used for air shower Monte Carlo (M ... More
Presented by Ryuji TAKEISHI on 18 Jul 2017 at 15:00
The observation of Ultra-high-energy cosmic rays (UHECR) from space offers several advantages such as large exposure, uniform observation of both celestial hemispheres, uniform detector response. The EUSO collaboration is implementing a mission based on the International Space Station, KLYPVE-EUSO, which will observe UHECR from space for the first time. To this purpose, we have developed high-perf ... More
Presented by Marco CASOLINO on 15 Jul 2017 at 17:15
Session: Poster & Coffee
Board #: 132
Mini-EUSO/UV-Atmosphera is a high-sensitivity, Ultraviolet (UV) detector to study and map UV emissions from the Earth and its atmosphere. The telescope will observe Earth in the nadir direction from the inside of the International Space Station. Mini-EUSO has the same multi-anode photomultiplier focal surface as the one used in the other EUSO detectors and an optics of two, 25 cm diameter Fresnel ... More
Presented by Marco CASOLINO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 131
KLYPVE-EUSO aims to place a UHECR (Ultra-High-Energy Cosmic Ray) observatory on board the International Space Station (ISS). The mission is led by Russian Space Agency with the detector being developed in the framework of the JEM-EUSO collaboration. The current design is based on a Schmidt optics and a Multi-Anode-Photomultiplier focal surface which increases about ten times the field of view of t ... More
Presented by Marco CASOLINO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 073
Mini-EUSO is a science mission to observe UV background of the night Earth atmosphere from a UV transparent porthole of the International Space Station for future ultra-high energy cosmic ray missions such as KLYPVE-EUSO (K-EUSO) and JEM-EUSO. The Mini-EUSO optical design has two 250 mm double-sided Fresnel lenses and a flat focal surface. The overall length of the optical system is 300 mm. Its fi ... More
Presented by Yoshiyuki TAKIZAWA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 104
Wide Field CherenKov Telescope Array(WFCTA) of LHAASO, consisting of 12 telescopes, has been proposed to mounted at Daocheng County, Sichuan Province, China, to probe the cosmic rays with the energy of 3*10^13eV-10^17eV together with WCDA and KM2A of LHAASO. 4 laser lidars and 2 WFCTA prototypes will be build to calibrate the WFCTA. Considering the Rayleigh scattering and propagation together with ... More
Presented by Fengrong ZHU on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 103
Wide Field CherenKov Telescope Array(WFCTA) of LHAASO, consisting of 12 telescopes, has been proposed to mounted at Daocheng County, Sichuan Province, China, to probe the cosmic rays with the energy of 3*10^13eV-10^17eV together with WCDA and KM2A of LHAASO. 2 YAG lasers, 2 N2 lasers and 2 WFCTA prototypes will be build to calibrate the WFCTA. One YAG laser will be placed at a site far away from t ... More
Presented by Fengrong ZHU on 18 Jul 2017 at 15:00
The Telescope Array (TA) shows a 20◦ hotspot as well as an excess of UHECRs above 50 EeV when compared with the Auger spectrum. We consider the possibility that both the TA excess and hotspot are due to a dominant source in the Northern sky. We carry out detailed simulations of UHECR propagation in both the intergalactic medium and the Galaxy, using different values for the intergalactic magneti ... More
Presented by Etienne PARIZOT on 19 Jul 2017 at 14:15
Terrestrial Gamma Flashes (TGFs) have been observed in satellite-borne gamma ray detectors for several decades, starting with the BATSE instrument on the Compton Gamma-Ray observatory in 1994. Subsequent observation and simulation efforts have led to a model in which TGFs are produced in relativistic runaway electron avalanches (RREA), during upward negative breakdown at the beginning of intraclou ... More
Presented by John BELZ on 14 Jul 2017 at 14:00
Session: Poster & Coffee
Board #: 124
We are testing a plastic detector prototype to observe cosmic rays of GeV level. The energy deposit in the detector is important to know the composition of the particles which reach on the ground. We use compton scattering of RI to calculate the energy deposit of thin plastic scintillators. The experimental values are compared with Geant4 simulation results. Polystyrene based scintilltor of 1cm th ... More
Presented by Wooram CHO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 165
The Auger Engineering Radio Array (AERA) is located at the Pierre Auger Observatory in Mendoza, Argentina. More than 150 autonomous antenna stations, spread over 17 km^2, are used to measure the radio emission from extensive air showers initiated by cosmic rays with energies above 0.1 EeV in the frequency range of 30 – 80 MHz. AERA is operated in coincidence with the other detectors of the Obser ... More
Presented by Ewa Marlen HOLT on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 068
The knowledge of both the long-term characteristics of the atmosphere and of its immediate state is of vital importance for the study of extensive air showers. The F/Photometric Robotic Atmospheric Monitor (FRAM), installed at the Pierre Auger Observatory, is an autonomously operating instrument which measures the integral light extinction in a given direction using stellar photometry. Its primary ... More
Presented by Jiri BLAZEK on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 123
Ultra high energy cosmic rays over 10 ^ 19 eV are thought to come from very powerful objects such as Active Galatic Nucleus(AGN). However, the number of AGNs and ultra high energy cosmic rays is not large enough to experimentally declare the correlation between them. We use Watson and Mortlock’s bayesian statistical method to compare the arrival direction data of large ground arrays such as the ... More
Presented by Wooram CHO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 180
Every astrophysical environment where UHECR nuclei are accelerated and interact with the dense photon fields of the environment will also produce neutrinos. This depends on several aspects of the modelling of the related photo-nuclear physics in the energy range of the Giant Dipole Resonance and the Quasi Deuteron processes, and also in a regime where the production of pion occurs, which eventuall ... More
Presented by Anatoli FEDYNITCH on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 172
At higher energies the uncertainty in the estimated cosmic ray mass composition, extracted from the observed distributions of the depth of shower maximum Xmax, is dominated by uncertainties in the hadronic interaction models. Thus, the estimated composition depends strongly on the particular model used for its interpretation. To reduce this model dependency in the interpretation of the mass compos ... More
Presented by Jose BELLIDO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 146
Results of investigations of cascade showers produced by muons in the Cherenkov water calorimeter (CWC) NEVOD with about 2000 cubic meters volume and a dense spatial lattice of quasi-spherical measuring modules (QSMs) are presented. Each QSM includes six PMTs with flat photocathodes directed along rectangular coordinate axes. The three-dimensional distribution of the Cherenkov radiation from the c ... More
Presented by Rostislav KOKOULIN on 18 Jul 2017 at 15:00
Knowledge of the mass composition of cosmic rays in the transition region of galactic to extragalactic cosmic rays would allow for the discrimination of different astrophysical models on their origin, acceleration, and propagation. An important observable to separate different mass groups of cosmic rays is the number of muons in extensive air showers. Currently, both the Pierre Auger and the Teles ... More
Presented by Markus ROTH on 13 Jul 2017 at 18:15
In order to solve the problem of the excess of multi-muon events observed in several cosmic ray experiments at ultra-high energies (so-called ‘muon puzzle’), investigations of the energy characteristics of the muon component of extensive air showers (EAS) are required. A possible approach to such investigations is the measurement of the energy deposit of muon bundles in the detector, which pro ... More
Presented by Rostislav KOKOULIN on 13 Jul 2017 at 17:30
The measurement of the individual charged particles in an extensive air shower (EAS), at a surface detector array, provides important distinguishing parameters to identify the cosmic primary mass spectrum. These will also contribute to the mapping of the very high energy interactions in the topmost layers of the atmosphere, i.e., beyond the reach of current accelerators, and to probe anomalies bey ... More
Presented by Moon Moon DEVI on 13 Jul 2017 at 13:45
Primary cosmic ray energy spectrum above 1 PeV has been measured with PRISMA-YBJ being a prototype of PRISMA array at altitude of 4300 m a.s.l. It realized a novel type of EAS recording method measuring hadronic EAS component over the total array area through thermal neutron detection with a specially developed so-called en-detectors sensitive to electron and thermal neutron EAS components. Primar ... More
Presented by Yuri STENKIN on 19 Jul 2017 at 13:30
Session: Poster & Coffee
Board #: 166
The complex of arrays for studying CR with energy greater than 10^{15} eV is in operation in Tunka Astrophysical Center, located in the Tunka Valley 50 km from Lake Baikal. The complex includes Cherenkov EAS array Tunka-133, radio-extension of Tunka-133 - Tunka-Rex, and a scintillation array for detecting of charged particles (electrons and muons) Tunka-Grande. The last was put into operation at t ... More
Presented by Nikolay BUDNEV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 056
By the end of 2014, a cosmic ray muon telescope consisting of two detectors which has 0.5 m × 0.5 m area scintillator was installed at Antarctic Zhongshan Station. It is locate latitude and longitude coordinates of 69.4°S and 76.4°E, respectively, at sea level. The vertical cutoff rigidity of cosmic ray protons at Zhongshan Station is 0.76 GV. The Zhongshan Station muon telescope data shows tha ... More
Presented by Ji-long ZHANG on 18 Jul 2017 at 15:00
We present an update of the cosmic ray energy spectrum measured from 3*10^17 eV up to the most extreme energies at the Pierre Auger Observatory. This large energy range can be covered by combining data from the surface detector (subdividing the events in a vertical and a horizontal data set), from a denser array of stations and from hybrid events simultaneously recorded by the surface and the fluo ... More
Presented by Francesco FENU on 18 Jul 2017 at 14:00
Session: Poster & Coffee
Board #: 155
Primary cosmic ray mass composition above 1 PeV has been measured with PRISMA-YBJ being a prototype of PRISMA array at altitude of 4300 m a.s.l. It realized a novel type of EAS recording method measuring hadronic EAS component over the total array area through thermal neutron detection with a specially developed so-called en-detectors sensitive to electron and thermal neutron EAS components. Prima ... More
Presented by Yuri STENKIN on 18 Jul 2017 at 15:00
We have started a new hybrid air shower experiment at Yangbajing (4300 m a.s.l.) in Tibet since March 2014. This new hybrid experiment consists of the YAC-II comprised of 124 core detectors placed in the form of a square grid of 1.9 m spacing covering about 500 m2, the Tibet-III AS array with the total area of about 50,000 m2 and the underground MD array consists of 80 cells, with the total area o ... More
Presented by Jing HUANG on 17 Jul 2017 at 17:15
Though the main task of neutrino telescopes with volume about 1 km^3 (IceCube, KM3NeT, GVD) is the search of neutrinos of astrophysical origin, they give a good possibility for investigations of atmospheric muons with energy more than 100 TeV (VHE muons). Measurements of the energy spectrum and angular distribution of such muons give information about primary energy spectrum and mass composition a ... More
Presented by Aleksei BOGDANOV on 14 Jul 2017 at 13:30
The future SKA-low will provide an extremely dense and very homogeneous antenna array on an area of roughly 0.5 km^2 and with a large bandwidth of 50-350 MHz. With minor engineering changes it would be ideally suited to detect extensive air showers initiated by cosmic rays in the Earth’s atmosphere via their pulsed radio emission. The very precise measurements of individual cosmic-ray air-shower ... More
Presented by Tim HUEGE on 18 Jul 2017 at 18:00
The Pierre Auger Observatory located near the town of Malargüe (Argentina) is the largest facility for studying cosmic rays above 10^17 eV. The searches for anisotropies in the arrival direction distribution carry important information on the sources distribution and on the propagation of cosmic rays. We update the results of the searches for anisotropies in the distribution of arrival directions ... More
Presented by Ugo GIACCARI on 18 Jul 2017 at 14:15
Session: Poster & Coffee
Board #: 156
Our study exploits the Constant Intensity Cut principles applied simultaneously to muonic and electromagnetic detectors of cosmic rays. We use the fact that the ordering of events according to their signal sizes induced in different types of surface detectors provides information about the mass composition of primary cosmic-ray beam, with low sensitivity to details of hadronic interactions. Compos ... More
Presented by Jakub VICHA on 18 Jul 2017 at 15:00
During bad weather conditions, muon flux above 1 GeV observed in GRAPES-3 muon telescope shows large variations. The atmospheric electric field is believed to be responsible for acceleration of cosmic ray muons. A thunderstorm event observed on 30 September 2015 is discussed here. The field of view of large area (560 m^2) tracking muon telescope at GRAPES-3 allows study of muon intensity variation ... More
Presented by Balakrishnan HARIHARAN on 17 Jul 2017 at 16:45
Session: Poster & Coffee
Board #: 016
The radio detection method for cosmic rays relies on coherent emission from electrons and positrons which is beamed in a narrow cone along the shower axis. Currently the only models to reproduce this emission with sufficient accuracy are Monte Carlo based simulations of the particle and radio emission physics, which require large investments of computation time. The work presented here focuses on ... More
Presented by Tim HUEGE on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 022
Recent extensive air shower (EAS) observations have brought about the precise energy spectra of extremely high energy cosmic ray (EHECR) that show a sudden drop of cosmic ray flux around 10^{19.7}eV. As for the mechanism of this rapid dropping, there are thesis but no established one. One of the big reason of the difficulty of the interpretation of the energy spectrum comes from the uncertainty in ... More
Presented by Nobuyuki SAKURAI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 115
The High Altitude Water Cherenkov (HAWC) observatory is a ground-based air-shower detector designed to study the TeV gamma and cosmic ray windows. The observatory is composed of a densely packed array of 300 water Cherenkov tanks, 4.5 m deep and 7.3 diameter with 4 photomultipliers (PMT) each, distributed on a 22,000 m2 surface. The instrument registers the number of hit PMT’s as well as the tim ... More
Presented by Aleksei BOGDANOV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 009
Large variations in muon flux above 1 GeV observed in GRAPES-3 muon telescope are a result of their acceleration in atmospheric electric fields. To interpret this phenomenon, detailed Monte Carlo simulations were carried out by using CORSIKA package. The effects of applied electric field can be studied with the option ’EFIELD’ available in CORSIKA. However, this option works only for electrons ... More
Presented by HARI HARAN BALAKRISHNAN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 013
The large area (560 m^2 ) GRAPES-3 tracking muon telescope located at Ooty, India has been operating uninterruptedly since 2001. Everyday it records 4 × 10^9 muons of energy > 1 GeV with an angular resolution of ∼ 4^◦ . Atmospheric temperature variation affects the rate of decay of these GeV muons produced by the galactic cosmic rays (GCRs), which in turn modulates the intensity of detected m ... More
Presented by Arun Babu KOLLAMPARAMBIL PAUL on 18 Jul 2017 at 15:00
ARIANNA Horizontal Cosmic Ray (HCR) station is an antenna array aiming at detecting RF impulses emitted from nearly horizontal extensive air showers (EAS) generated by cosmic rays above about 0.1 EeV, and ultra-high energy Earth-skimming tau neutrinos coming out from nearby mountains. A prototype station consisting of four log-periodic dipole antennas above the ice, in frequency range of 130-500 M ... More
Presented by Shih-Hao WANG on 18 Jul 2017 at 17:45
Session: Poster & Coffee
Board #: 015
Recently, the energy determination of extensive air showers using radio emission has been shown to be both precise and accurate. In particular, radio detection offers the opportunity for an independent measurement of the absolute energy of cosmic rays, since the radiation energy (the energy radiated in the form of radio signals) can be predicted using first-principle calculations involving no free ... More
Presented by Tim HUEGE on 18 Jul 2017 at 15:00
The GRAPES-3 experiment, a high density extensive air shower (EAS) array located at Ooty, India is designed for high precision measurements of cosmic ray energy spectrum and nuclear composition in energy range of 10^{13} – 10^{16} eV. It consists of tightly packed 1 m^2 area 400 plastic scintillation detectors covering an effective area of 25,000 m^2 . The trigger rate and particle density measu ... More
Presented by M. ZUBERI on 13 Jul 2017 at 14:30
Session: Poster & Coffee
Board #: 086
The GRAPES-3 experiment in Ooty, India has been operating a large area (560 m^2) tracking muon telescope since 2000. It consists of 16 identical modules and each one is designed to measure the flux of muons in 13 x 13 directions covering 2.3 sr field of view. The high statistics data has enabled to probe transient space weather events on time scale of minutes. Due to independent nature of operatio ... More
Presented by Pravata Kumar MOHANTY on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 087
The GRAPES-3 experiment is an array of ∼400 plastic scintillator detec- tors with a compact configuration at Ooty in India. An accurate measurement of the gain of each detector is an important requirement for accurate determi- nation of the energy of primary cosmic rays. In the old method used earlier relied on manual placement of muon paddles for determining the signal pro- duced by single muon ... More
Presented by Jhansi Bhavani VUTA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 157
The PICARD code for the numerical solution of the cosmic ray propagation problem is optimized to solve transport problems that incorporate e.g. complexity of full 3D structure of our Galaxy. PICARD is now used to investigate the impact of anisotropic cosmic-ray diffusion on the Galactic cosmic-ray flux distribution. We discuss different magnetic field models for our Galaxy alongside cosmic-ray sou ... More
Presented by Olaf REIMER on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 054
The Latin American Giant Observatory (LAGO) is an international experiment with multiple scientific objectives. These objectives include the study of the extreme universe, space weather and atmospheric radiation at ground level. The observatory is composed of several experimental sites, distributed in the American continent, from Argentina to Mexico. The highest LAGO site is located on the Chacalt ... More
Presented by Marko ANDRADE on 18 Jul 2017 at 15:00
The GRAPES-3 experiment is a unique facility to study cosmic ray energy spectrum and composition with high precision. It consists an array of 400 plastic scinitillation detectors and a muon telescope of 3712 proportional counters to study extensive air shower (EAS) phenomenon around knee ($geq$10$^{15}$ eV). Study of energy spectrum and composition of primary cosmic rays (PCRs) can improve the und ... More
Presented by Anuj CHANDRA on 19 Jul 2017 at 17:00
Session: Poster & Coffee
Board #: 088
In the GRAPES-3 experiment, consisting of an array of ∼400 scintillator detectors, the arrival direction of the shower is determined from the relative arrival times of particles at different detectors. The fixed arrival time of the signal from the detector to the measuring device, referred as time offset, is crucial for an accurate measurement of shower direction. In the older method the time of ... More
Presented by Jhansi Bhavani VUTA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 043
The Pierre Auger Observatory is in the process of upgrading its surface detector array by placing a 4 m^2 scintillator atop each of the existing 1660 water-Cherenkov detectors. The differing responses of the two detectors allow for the disentanglement of the muonic and electromagnetic components of air showers, which ultimately facilitates reconstruction of the mass composition of ultrahigh-energy ... More
Presented by David SCHMIDT on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 100
The space weather program of the LAGO project aims to study the galactic cosmic ray modulation estimated from the measurement of secondary cosmic ray flux in the network of detectors of the project. The experiment consists of several water Cherenkov tanks located at different altitudes, ranging from sea level (Lima) up to 5000 meters above sea level (Chacaltaya), and latitudes, which span most of ... More
Presented by Luis OTINIANO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 101
One importan goal of the High Energy program of the LAGO project is to detect the high energy component of cosmic rays due to Gama Ray Bursts. Therefore, high altitude sites (over 4500 m.a.s.l) are chosen for installation of some detectors. The altitude allows the improvement of the sensitivity of the detectors otherwise reduced due to the strong absorption of extensive air showers initiated by ga ... More
Presented by Luis OTINIANO on 18 Jul 2017 at 15:00
The GRAPES-3 is an extensive air shower experiment consisting of ~400 scintillation detectors and 560 m^2 large area tracking muon detector, located at Ooty (2,200 m asl), India. The expansion of the array is in active phase to improve its performance for gamma ray astronomy, and for the study of the chemical composition of the primary cosmic rays above ~10 TeV. During this expansion, both the are ... More
Presented by Akitoshi OSHIMA on 14 Jul 2017 at 13:45
The Extreme Energy Events Project is aimed to the study of Cosmic Rays and Cosmic Rays-related phenomena, via a synchronous sparse array of 52 tracing detectors (growing), deployed over a broad area covering 10 degrees in latitude and 11 in longitude. The array is composed by both clusters and stand-alone stations, each made of three Multigap Resistive Plate Chambers (MRPC), with a 100 ps single s ... More
Presented by Ivan GNESI on 19 Jul 2017 at 18:00
Session: Poster & Coffee
Board #: 061
We present a novel numerical model for the propagation of ultra-high energy charged particles in the intergalactic medium, assumed to have a cellular structure of coherent magnetic fields. We take into account the diffusion of ultrarelativistic particles under the influence of the extragalactic magnetic fields and their energy losses. The fields are considered to have random orientations of their ... More
Presented by Marcelo Augusto LEIGUI DE OLIVEIRA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 189
We present an update of the model of the Galactic Magnetic Field (GMF) from Jannson&Farrar (2012). For this purpose we explore improved functional forms to model the coherent and random magnetic field in the Galaxy. We determine the parameters of the new fiducial model by matching its predictions for extragalactic rotation measures and the polarized and unpolarized synchrotron emission to data. Mo ... More
Presented by Michael UNGER on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 143
LAGO is an extended cosmic ray observatory composed of Water Cherenkov Detectors (WCD) placed throughout Latin America. One of the LAGO goals is to design and build new high-performance, low cost Data Acquisition System (DAS) for particle detectors. In this work we present the first steps in the development of a DAS for WCD detectors. The DAS system consists of two fast acquisition channels, sever ... More
Presented by Felipe NAVARRO, Dennis CAZAR RAMIREZ on 18 Jul 2017 at 15:00
The event generator Sibyll can be used for the simulation of hadronic multiparticle production up to the highest energies. Following the update of the long enduring model version 2.1 with the results of fixed target and collider experiments taken in the last decade, we present the revised model version 2.3 that is further improved by adjusting particle production spectra to match the expectation o ... More
Presented by Ralph ENGEL on 13 Jul 2017 at 16:45
SFLASH is a continuation of the Fluorescence in Air Showers experiment originally run at the SLAC National Laboratory in 2003-2004. SFLASH is designed to measure the absolute fluorescence yield in a developed electromagnetic shower induced by a bunch of about a billion electrons in 1-3 radiation lengths of alumina. These measurements provide a true calibration for fluorescence detectors, such as t ... More
Presented by Charles JUI on 13 Jul 2017 at 14:15
Session: Poster & Coffee
Board #: 142
This paper describes the installation, calibration and operation of a Water Cherenkov Detector (WCD) at Escuela Politécnica Nacional in Quito–Ecuador at 2810 m.a.s.l. and latitude 0°12’44.007” S. The project was developed as part of the Latin American Giant Observatory (LAGO) Collaboration. The instrumentation consists of a polyethylene tank, a 5” PMT (EMI 9530A) and the electronic acqui ... More
Presented by NICOLAS VASQUEZ on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 024
It is well known that the Heitler model and its extensions (like the Heitler-Matthews model) describe qualitatively many fundamental properties of extensive air showers initiated in the atmosphere by the high-energy cosmic rays. Typically only the secondary particle multiplicity and the fraction of neutral to charged pions are considered as analytically treatable parameters of hadronic interaction ... More
Presented by Ralph ENGEL on 18 Jul 2017 at 15:00
Some discrepancies have been reported between observed and simulated muon content of extensive air showers: the number of observed muons exceeded the expectations in HiRes-MIA, Yakutsk and Pierre Auger Observatory data. We analyzed the data of the Moscow State University Extensive Air Shower (EAS–MSU) array on > 10 GeV energy muons in showers caused by ∼ 100 PeV primary particles and demonstra ... More
Presented by Mikhail KUZNETSOV on 13 Jul 2017 at 14:00
Session: Poster & Coffee
Board #: 161
We report the results of the search for ∼ (10−300) PeV primary cosmic-ray photons with the data of the Moscow State University (MSU) Extensive Air Shower (EAS) array. The muon content of the showers recorded by the underground part of the array was used as the hadron/photon discriminating observable. The full-scale reanalysis of the data with modern simulations of the installation does not con ... More
Presented by Mikhail KUZNETSOV on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 012
One of main sources of the Earth's atmosphere ionization is the cosmic rays, galactic (GCR) and solar (SCR). Primary cosmic rays, consisting mainly of protons, ionize the upper layers of the atmosphere, and also interact with the nuclei of the surrounding matter (mainly nitrogen and oxygen), giving a secondary cosmic ray cascades, which in turn also participate in the ionization of the entire lowe ... More
Presented by Yury BALABIN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 019
The origin of the cosmic ray hadron excess observed in a deep uniform lead X-ray emulsion chamber (XREC) at depths larger than 70 radiation lengths is analyzed. We present preliminary experimental data on the absorption of cosmic ray hadrons in the two-storey XREC with a large air gap exposed at the Tien Shan mountains. The design of the chamber was especially invented to prove the hypothesis on a ... More
Presented by Alexander BORISOV on 18 Jul 2017 at 15:00
Session: High Light Talks
The Extreme Universe Space Observatory on a Super Pressure Balloon (EUSO-SPB) was launched April 25 2017 from Wanaka New Zealand as a mission of opportunity on a NASA super pressure balloon test flight planned to circle the southern hemisphere. The primary scientific goal was to make the first observations of high energy cosmic ray extensive air showers by looking down on the atmosphere with an op ... More
Presented by Lawrence WIENCKE on 13 Jul 2017 at 11:00
The method is described for estimation of the parameters of primary particles of extensive air showers by a complex high mountain detector array, developed in the framework of PAMIR-XXI project. The results can be useful for other high altitude projects as well as for the method of EAS detection in general. We present particular configurations of optical and charged particles detectors, methods of ... More
Presented by Alexander BORISOV on 17 Jul 2017 at 14:15
Session: Poster & Coffee
Board #: 032
Nuclear emulsion is three dimensional tracking detector which is able to record minimum ionizing particle with micrometric accuracy. We are developing nuclear emulsion for observation of cosmic ray and its analysis techniques. We have been applying nuclear emulsion for cosmic ray muon radiography to measure inner structure of nuclear power plants, volcanoes and so on. Since 2015, we have been obse ... More
Presented by Kunihiro MORISHIMA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 029
We are developing radiography technology using cosmic ray muons. Density length of inside large structures are estimated by attenuation of muon flux. We studied at volcano and nuclear reactors in Japan. In resent day, We have been installed nuclear emulsion detectors in Pyramids at Egypt and investigated them by muon radiography. Radiography imaging resolution are deteriorated by multiple coulomb ... More
Presented by Mitsuaki KUNO on 18 Jul 2017 at 15:00
We have performed high-resolution simulations of the flux and spectrum of gammas detectable by Fermi-LAT, coming from UHECR-induced cascades, using the state-of-the-art (Gilmore) model of extragalactic background light, ELMAG to simulate the EM cascade (modified to work correctly for the Gilmore EGBL) and CRPropa to simulate the production of EM secondaries from UHECR propagation. We examine the v ... More
Presented by Marco MUZIO on 18 Jul 2017 at 13:30
Session: Poster & Coffee
Board #: 162
With data collected over the last seven years, the IceCube South Pole Neutrino Observatory has measured both the large- and small-scale anisotropy in the cosmic-ray arrival direction distribution with a high level of significance. In addition to the sidereal anisotropy, we have also measured the solar dipole caused by the orbital motion of the Earth around the Sun. We present the cosmic-ray anisot ... More
Presented by Juan Carlos DÍAZ VÉLEZ on 18 Jul 2017 at 15:00
Muography is a technique for the imaging of the interior of large size objects, such as mountains, volcanoes with the measurement of the flux of high energy cosmic muons [1,2]. The electrons/positrons, high energy hadrons and low energy muons can contaminate the muon signal. These background sources require a good understanding of the creation processes, as well as reliable simulation frameworks w ... More
Presented by Laszlo OLAH on 15 Jul 2017 at 14:30
Session: Poster & Coffee
Board #: 191
In this work, we use Lorentz invariance violation (LIV) introduced as a generic modification to particle dispersion relations to study some consequences of single photon emission, known as vacuum Cherenkov radiation, and photon decay processes in cosmic and gamma rays. These processes are forbidden in a Lorentz invariant theory but allowed under the hypothesis of LIV. We show that the emission rat ... More
Presented by Humberto MARTÍNEZ on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 055
The secondary flow of particles produced in the atmosphere by galactic and extragalactic primary cosmic rays is affected by the Earth's magnetic field and by atmospheric variables such as pressure and temperature. In this work measurements of the cosmic ray flux obtained with a counting detector are shown. The detector consists of three plastic scintillators coupled to photomultiplier tubes and si ... More
Presented by Mario RODRIGUEZ on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 031
The use of Cosmic-Rays (CR) as a benchmark for new physics (beyond the standard model) search, is an approach based on the fact that, historically, the energy reached by the particle colliders has been and continues to be smaller than the energy the CR can achieve. Nevertheless the energies achieved by the particle colliders nowadays is getting closer to those the CR of the highest energies have, ... More
Presented by Cederik DE LEÓN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 060
CHARM, Cosmic High Altitude Radiation Monitor, is an observatory whose target is the study of cosmic rays. This is actually under construction stage and it consists in a Water Cherenkov Detectors (WCD) array located in Puebla México, at 18.591N and 97.1876W, it is 4300 meters over sea level. Each WCD container is covered inside with a high UV reflectivity material called Tyvek (inner walls) and i ... More
Presented by Oscar MARTINEZ, Epifanio PONCE, Eibar HERNANDEZ, Jorge COTZOMI, Ruben CONDE, Humberto SALAZAR on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 030
The computation time used by the Extensive Air Showers (EAS) simulators is a determining variable that needs to be considered when performing studies or generating shower simulated libraries. The thinning method implemented in the EAS simulator codes has been a useful tool when the computational resources were limited, nevertheless at present the computers allows to perform more calculations in a ... More
Presented by Cederik DE LEÓN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 148
The OPERA detector was used to measure the annual modulation of the atmospheric muon flux at the Gran Sasso underground laboratory (3800 m w.e.). We present preliminary results using 5 years of data (2008-2012) showing a flux modulation with a period of 1 year and a relative amplitude of 1.5%. The phase of the maximum intensity and the effective temperature coefficient $alpha_T$, which correlates ... More
Presented by Christop TOENNIS on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 130
The TUS space experiment is aimed to study the energy spectrum and arrival direction of Ultra High Energy Cosmic Rays (UHECR) at E ⁓10^20 eV by measuring the fluorescence yield of EAS in the atmosphere. The "Lomonosov" satellite, with TUS, was launched at the April 16, 2016. Satellite now is in orbit and fully operational. The TUS collaboration design and produce a ground-based system of light s ... More
Presented by Andrew DMYTROTSA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 002
The Large Volume Detector (LVD) is a 1000 t liquid scintillator detector located in the Gran Sasso Laboratory (average depth 3600 m w.e.). Its main aim is the search for neutrino bursts from gravitational stellar collapses: its detection capability extends to the whole Galaxy. LVD has been continuously taking data since 1992: the non-observation of neutrino-bursts over such a long-continued exposu ... More
Presented by Carlo Francesco VIGORITO on 18 Jul 2017 at 15:00
Session: High Light Talks
Like in our galaxy, cosmic rays (CRs) are expected to exist in the space between galaxies. Shocks waves induced during the hierarchical formation of the large-scale structure of the universe, which are collisionless like most astrophysical shocks, are believed to be dominant sources of those intergalactic CRs. Here, based on N-body/hydrodynamic simulations of a LCDM universe, I present the nature ... More
Presented by Dongsu RYU on 14 Jul 2017 at 11:30
Session: Poster & Coffee
Board #: 195
In this review, I will reflect on the lessons learnt in the past decade with regards UHECR propagation and their secondary signatures. Starting from a consideration of their travel through extragalactic space, consideration will be made about what can be said about their source evolution. Complimentary to this discussion about the propagation of the UHECR primaries, the information conveyed by the ... More
Presented by Sunil GUPTA on 18 Jul 2017 at 15:00
Session: High Light Talks
In this talk we will present highlights from the Pierre Auger Observatory, the world's largest detector for ultra-high energy cosmic rays. The presented results are based on an exposure of more than 66,000 km^2 sr yr, i.e. about 25% more data than presented at the previous ICRC. We will discuss the update of the measurement of the energy spectrum and mass composition of cosmic rays over a wide ran ... More
Presented by Michael UNGER on 15 Jul 2017 at 12:00
Presented by Elisa RESCONI on 17 Jul 2017 at 08:30
Session: Poster & Coffee
Board #: 229
Three generations of leptons and quarks correspond to the lepton charges (LC) in the present work. Then, the leptons have the electric charges (EC) and lepton charges (LC). The quarks have the EC, LC and color charges (CC). Three heavy leptons and three heavy quarks are introduced to make the missing third flavor of EC. Then the three new particles which have the electric charges (EC) are proposed ... More
Presented by Jae-Kwang HWANG on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 228
The Lightest Kaluza-Klein particle (LKP), which appears in the Universal Extra Dimension theory (UED), emits gamma-ray directly or secondarily, when it annihilates. The gamma-ray signal from annihilation of LKP will create prominent structure around the LKP mass, and we expect the structure can be observed by using ongoing and near-future space-based detectors with a few percent energy resolution. ... More
Presented by Masaki MORI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 223
With short lifetime, cosmic-ray electrons with energies above GeV are a unique probe of our local Galactic neighborhood. Cosmic-ray electrons observed around Earth general originate from the secondary of cosmic ray when propagating within the Galactic interstellar medium. Recently, an unexpected feature in their spectrum at a few hundred GeV are measured by several experiments, i.g., ATIC, Fermi, ... More
Presented by BaoSheng GAO on 18 Jul 2017 at 15:00
Session: DM(Dark Matter)
XMASS is a large volume multi-purpose experiment using a liquid xenon technology located underground in Kamioka Observatory, Japan. XMASS-I aims to search for dark matter, which is holding 832kg of liquid xenon in an active volume. In this talk, the result of WIMPs search using fiducial volume analysis will be reported. The data accumulated between November 2013 and March 2016 were used for this a ... More
Presented by Hiroshi OGAWA on 18 Jul 2017 at 17:30
Session: DM(Dark Matter)
XMASS-I is dedicated to a direct dark matter search using nearly 1 tons of liquid xenon as target material. One of the signatures of dark matter in the direct detection experiments is the annual modulation of the event rate due to the relative motion of the Earth around the Sun. We have continuously collected data with a low trigger threshold of ~0.6 keVee for more than 3 years since November 2013 ... More
Presented by Byeongsu YANG on 18 Jul 2017 at 17:15
Session: DM(Dark Matter)
Neutrino telescopes provide some of the best sensitivities for heavy decaying dark matter. With IceCube's observation of high-energy astrophysical neutrinos, interest in scenarios that could explain their origin as a result of the decay of long-lived heavy dark matter particles has risen. We present two dedicated experimental analyses to test this scenario of decaying dark matter with masses above ... More
Presented by Joeran STETTNER on 19 Jul 2017 at 17:45
Session: Poster & Coffee
Board #: 225
Having no significant radioactive isotopes and high light yield, liquid xenon is a favorite for low background scintillation detection. With ~40cm the Rayleigh scattering length for its scintillation emission at 175nm is limited though, presenting a challenge for position sensitive scintillation detection and signal extraction in large single phase detectors. In a 1984 paper it was shown that intr ... More
Presented by Kai MARTENS on 18 Jul 2017 at 15:00
Session: DM(Dark Matter)
The COSINE experiment is a dark matter search that uses an array of scintillating NaI(Tl) crystals as a target/detector and is located in the Yangyang Underground laboratory. The construction of the first phase of the experiment, called COSINE-100, was completed in the summer of 2016 and physics data of sufficient quality to reproduce the WIMP-Dark-Matter-like annual modulation signal observed by ... More
Presented by Chang Hyon HA on 18 Jul 2017 at 17:00
Session: Poster & Coffee
Board #: 200
The COSINE-100 experiment is a joint effort between the KIMS-NaI and DM-Ice experiments to test DAMA's claim for WIMP discovery. It consists of ~106 kg of NaI(Tl) crystals immersed in ~2 tonnes of liquid scintillator as an active veto. The physics run of the experiment has begun in September 2016 at the Yangyang Underground Laboratory in South Korea. The background study and the performance of the ... More
Presented by Pushparaj ADHIKARI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 207
The goal of the COSINE-100 experiment is to confirm or refute the controversial observation of a WIMP-Dark-Mattter-like annual modulation by the DAMA/LIBRA experiment. Measurement of neutron flux for dark matter search experiment is extremely important because seasonal modulations of environmental neutrons that interact with the nuclei in the NaI(Tl) target/detector crystal array might mimic WIMP- ... More
Presented by Govinda ADHIKARI on 18 Jul 2017 at 15:00
Session: DM(Dark Matter)
Apart from known gamma-ray emitters, the extragalactic gamma-ray background (EGB) comprises emission from potentially undetected sources and may therefore serve as a valuable tool for their detection. While the classical approach of EGB decomposition manifests in combined spectral fits of individual contributions, statistical methods have recently been proven to provide an even more sensitive obse ... More
Presented by Hannes ZECHLIN on 19 Jul 2017 at 17:30
Session: DM(Dark Matter)
In the last decades an incredible amount of evidence for the existence of dark matter has been accumulating. At the same time, many efforts have been undertaken to try to identify what dark matter is. Indirect searches look at places in the Universe where dark matter is known to be abundant and seek for possible annihilation or decay signatures. The Cherenkov Telescope Array (CTA) represents the n ... More
Presented by Aldo MORSELLI on 19 Jul 2017 at 17:15
Session: DM(Dark Matter)
WIMPs are hypothetical elementary particles that interact weakly, with mass in the GeV-TeV range. WIMPs would constitute all or a part of dark matter and arise naturally in different theories beyond the Standard Model. The MAGIC telescopes are sensitive to gamma rays that would be produced in the annihilation or decay of WIMPs into Standard Model particles. Such emission is expected (and potential ... More
Presented by Joaquim PALACIO on 19 Jul 2017 at 17:00
Session: Poster & Coffee
Board #: 199
The COSINE experiment aims to reproduce the annual modulation signal observed by DAMA/LIBRA experiment using the same target medium, i.e. NaI(Tl). Cosmic-ray muon intensity varies seasonally and is a potential source of time-dependent backgrounds that may mimic a WIMP dark matter annual modulation signature. We constructed an array of 3-cm thick plastic scintillator panels that surround the crysta ... More
Presented by Hafizh PRIHTIADI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 204
The ISS-based CALET detector which is in operation since October 2015, can play an important role in indirect detection of Dark Matter by measuring the electron+positron cosmic-ray spectrum in the TeV region for the first time directly. With its fine energy resolution (≈ 2%) and high proton rejection ratio (1:〖10〗^5 ), CALET has the potential to search for fine structures in this spectrum. W ... More
Presented by Saptashwa BHATTACHARYYA on 18 Jul 2017 at 15:00
Session: DM(Dark Matter)
The signatures for the existence of dark matter are revealed only through its gravitational interaction. Theoretical arguments support the Weakly Interactive Massive Particle (WIMP) can be a class of dark matter and WIMP can annihilate and/or decay to Standard Model particles, among which neutrino is a favorable candidate. We show that the proposed 50 kton Magnetized Iron CALorimeter (MagICAL) det ... More
Presented by Amina KHATUN on 19 Jul 2017 at 16:45
Session: DM(Dark Matter)
The μνSSM solves the μ problem of supersymmetric models and reproduces neutrino data, simply using couplings with right-handed neutrinos ν's. Given that these couplings break explicitly R parity, the gravitino is a natural candidate for decaying dark matter in the μνSSM. In this work we carry out a complete analysis of the detection of μνSSM gravitino dark matter through γ-ray observation ... More
Presented by German GOMEZ-VARGAS on 19 Jul 2017 at 13:30
Session: Poster & Coffee
Board #: 203
We study the process of dark matter capture by the Sun, under the assumption of a Weakly Interacting Massive Particle (WIMP), in the framework of non-relativistic effective field theory. Hypothetically, WIMPs from the galactic halo can scatter against atomic nuclei in the solar interior, settle to thermal equilibrium with the solar core and annihilate to produce an observable flux of neutrinos. Th ... More
Presented by Axel WIDMARK on 18 Jul 2017 at 15:00
Session: DM(Dark Matter)
We devise a new semi-analytical method to deal with the propagation of Galactic electrons and positrons from MeV to TeV energies: the pinching method. It is essentially based on the pinching of inverse Compton and synchrotron energy losses from the magnetic halo, where they take place, inside the Galactic disc. This new tool is fast and allows to carry out extensive scans over parameters. We stron ... More
Presented by Mathieu BOUDAUD on 19 Jul 2017 at 16:30
Session: DM(Dark Matter)
The GAPS experiment is designed to carry out a sensitive dark matter search by measuring low-energy cosmic ray antideuterons and antiprotons. GAPS will provide a new avenue to access a wide range of dark matter models and masses that is complementary to direct detection techniques, collider experiments and other indirect detection techniques. Well-motivated theories beyond the Standard Model conta ... More
Presented by Rene ONG on 18 Jul 2017 at 17:45
Session: Poster & Coffee
Board #: 227
Spectra of Cosmic Rays (CRs), and particularly their features, contain a lot of important information about the astro-particle physics and the fundamental physics. Realizing that the 4 PeV knee of CR nuclei and the 1 TeV spectral cutoff of the electron share almost the same Lorentz factor, we propose that CRs experience a threshold interaction with a new particle X abundant in the Galaxy. The inte ... More
Presented by Chao JIN on 18 Jul 2017 at 15:00
Session: DM(Dark Matter)
One of the major purposes of the ANTARES neutrino telescope is the indirect search for dark matter. The ANTARES detector is located on the bottom of the Mediterranean Sea, 40 km off the southern French coast. In this talk the results of the search for dark matter signals from the Sun, the Galactic Center and the Earth core, produced with different analysis methods, will be presented. There are var ... More
Presented by Christoph TÖNNIS on 19 Jul 2017 at 14:45
Session: Poster & Coffee
Board #: 212
In direct detection of WIMP dark matter particles, scintillation crystals such as NaI(Tl) are commonly used as targets/detectors. Nuclear recoil responses of NaI(Tl) crystal were measured with 2.43 MeV mono-energetic neutrons from D-D fusion. From this measurement,the quenching factor and pulse shape discrimination(PSD) power of the crystal were measured. In scintillation crystals, interactions be ... More
Presented by Hanwool JOO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 217
Dark matter from the Galactic dark matter halo could be gravitationally captured in the Sun after scattering of a nucleon and accumulate in its center. The accumulated dark matter may annihilate into standard model particles and produce energetic neutrinos sequent decays. Neutrinos with energies below a few hundred GeV escape the Sun without any significant absorption and can be searched for at ne ... More
Presented by Seonjin IN on 18 Jul 2017 at 15:00
Session: DM(Dark Matter)
XENON1T is the current experiment of the XENON dark matter search program based on dual-phase (liquid-gas) xenon time projection chambers (TPCs) of increasing target mass and decreasing background. The XENON1T detector is the first multi-ton scale TPC containing a total of 3200 kg of liquid xenon of which 2000 kg are active. A blind analysis of 1042 kg fiducial mass and 34.2 live days of data acqu ... More
Presented by Patrick DE PERIO on 18 Jul 2017 at 16:45
Session: DM(Dark Matter)
DAMPE (DArk Matter Particle Explorer), a satellite mission of the Chinese Academy of Sciences dedicated to high energy particle detection in space, was successfully launched on December 17 2015. The main scientific objective of DAMPE is to detect electrons and photons in the range of 5 GeV-10 TeV with unprecedented energy resolution in order to identify possible Dark Matter signatures. It will als ... More
Presented by Xin WU on 19 Jul 2017 at 18:00
Session: Poster & Coffee
Board #: 214
Neutrino telescopes have searched for self-annihilating dark matter in the Galactic halo and placed the most stringent limits on the dark matter self-annihilation cross section $ angle sigma v langle$ for masses above 30 TeV. To date the most stringent limit was obtained by the ANTARES neutrino telescope looking at the Galactic Center region and is closely followed by the limits from the IceCube e ... More
Presented by Juan Antonio AGUILAR SÁNCHEZ on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 224
The DAMPE (DArk Matter Particle Explorer) is a scientic satellite which was successfully launched into a 500 Km sun-synchronous orbit, on December 17th, 2015, from the Jiuquan Satellite Launch Center of China. The major scientific objective of DAMPE mission is indirect searching for dark matter by observing high energy primary cosmic rays, especially positrons/electrons and gamma rays with an ener ... More
Presented by Changqing FENG on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 209
The era of precision cosmology has revealed that ~80% of the matter in the universe is dark matter. Two leading candidates, motivated by both particle and astro-physics, are Weakly Interacting Massive Particles (WIMPs) and axions, both of which have distinct gamma-ray signatures. The Fermi Large Area Telescope (Fermi-LAT) Collaboration continues to search for WIMP and axion signatures spanning the ... More
Presented by Regina CAPUTO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 220
Cosmic rays hitting the outer parts of the Sun result in showers of high energy particles. The shower particles propagate through the solar atmosphere and interact further or decay. Among the shower particles are high energy neutrinos, after production these oscillate between flavours and interact with the solar material while propagating out of the Sun to the Earth. This results in a high energy ... More
Presented by Carl NIBLAEUS on 18 Jul 2017 at 15:00
Session: DM(Dark Matter)
We study the ”GeV-excess” of diffuse gamma-rays in the Galactic halo with a template fit based on energy spectra for each possible process of gamma-ray emission. In addition to the ”standard” physical processes for gamma-ray production from π0 decays produced by diffused cosmic rays, inverse Compton scattering and Bremsstrahlung one finds clear evidence for two additional processes: π0 p ... More
Presented by Iris GEBAUER on 18 Jul 2017 at 18:15
Session: Poster & Coffee
Board #: 215
We study the ”GeV-excess” of diffuse gamma-rays in the Galactic halo with a template fit based on energy spectra for each possible process of gamma-ray emission. In addition to the ”standard” physical processes for gamma-ray production from π0 decays produced by diffused cosmic rays, inverse Compton scattering and Bremsstrahlung one finds clear evidence for two additional processes: π0 p ... More
Presented by Iris GEBAUER on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 219
Neutrino telescopes have been proposed as efficient tools for indirect dark matter searches, especially using the Sun as source for its good capability to capture dark matter and since we do not expect high-energy neutrinos from it. However, the last statement should be taken with caution because high-energy neutrinos may come from cosmic particle interactions in the atmosphere of the Sun and prod ... More
Presented by Christop TOENNIS on 18 Jul 2017 at 15:00
Session: DM(Dark Matter)
We present three searches for a neutrino signal from dark matter self-annihilations in the Milky Way. The signal from these events is identified by signatures which start developing within the fiducial volume of the IceCube Neutrino Observatory. The three presented analyses are sensitive to different energy scales and together cover an energy range from 10 GeV to 300 TeV in dark matter particle ma ... More
Presented by Samuel FLIS on 19 Jul 2017 at 14:30
Session: DM(Dark Matter)
High energy γ-rays are powerful probes in the search for annihilations of dark matter (DM) particles in dense environments. In several DM particle models their annihilation produces characteristic features such as lines, bumps or cut-offs in their energy spectrum. The High Energy Stereoscopic System (H.E.S.S.) of imaging atmospheric Cherenkov telescopes is perfectly suited to search for such feat ... More
Presented by Louise OAKES on 19 Jul 2017 at 14:15
Session: DM(Dark Matter)
In the cosmological paradigm, cold dark matter (DM) dominates the mass content of the Universe and is present at every scale. Candidates for DM include many extensions of the standard model with weakly interacting massive particles (WIMPs) in the mass range from ~10 GeV to greater than 10 TeV. The self-annihilation or decay of WIMPs in astrophysical regions of high DM density can produce secondary ... More
Presented by Benjamin ZITZER on 18 Jul 2017 at 18:00
Session: Poster & Coffee
Board #: 221
The DArk Matter Particle Explorer (DAMPE) is an orbital experiment which is aiming to search for the evidences of dark matter in space. Since it is launched in December 2015, a large quantity of data has been recorded. In the data analysis process of the DAMPE, to pick out the electromagnetic interaction particles from the hadron background is one of the most important steps on the way towards to ... More
Presented by Zhiyong ZHANG on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 202
The space experiment of DArk Matter Particle Explorer (DAMPE) developed in China is designed to find the evidence of dark matter particle by observing primary cosmic rays and gamma rays in energy range from 5GeV to 10TeV. And Geant4 is the main simulation engine for DAMPE experiment. So the precision of simulation data demonstrate the reliability of the physics models provided in Geant4 and are he ... More
Presented by Wu LIBO on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 201
A satellite-borne, high energy cosmic ray detector, named the DArk Matter Particle Explorer (DAMPE), was launched in the end of 2015. One of the major scientific objectives of the DAMPE mission is observing primary electrons in an energy range from 5 GeV to 10 TeV. In electron research, a specific method was developed to select events in effective angle of the DAMPE detector, and then obtain the a ... More
Presented by Yifeng WEI on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 211
The DArk Matter Particle Explorer (DAMPE) is a space borne experiment which is designed to search for the evidences of dark matter particles by measuring the flux of e^± and gamma rays in a large energy range from 5GeV to 10TeV in space. The BGO Electromagnetic calorimeter (ECAL) is in charge of energy measurement for the DAMPE. The high performance of calorimeter of DAMPE allows measurements wel ... More
Presented by Sicheng WEN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 208
The DArk Matter Particle Explorer (DAMPE) experiment began its on-orbit operations on December 17, 2015. The main goal of DAMPE is the detection of cosmic rays and gammas from the GeV to the TeV energy region to search for dark matter and understanding the origin of the cosmic rays. The BGO Electromagnetic Calorimeter (BGO ECAL) of the DAMPE is a total absorption calorimeter that allows for a prec ... More
Presented by Yunlong ZHANG on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 216
The dynamic of dwarf irregular (dIrr) galaxies is observed to be dominated by dark matter (DM). Recently, the DM density distribution has been studied for 31 dIrrs. Their extended DM halo (Burket type profile) makes these objects good candidates for DM searches. Located in Puebla (Mexico), the High Altitude Water Cherenkov (HAWC) Observatory is an optimal instrument to perform such DM searches, be ... More
Presented by Sergio HERNÁNDEZ CADENA on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 210
Several models predict that dark matter is constituted of Weakly Interacting Massive Particles (WIMPs). These hypothetical particles would be attracted by the gravity of massive astronomical objects such as black holes, stars, and the Earth. WIMPs can loose energy through scattering with matter and become trapped in the gravitational field of mentioned massive objects. Finally, WIMPs would annihil ... More
Presented by Jan LÜNEMANN on 18 Jul 2017 at 15:00
Session: DM(Dark Matter)
Although the existence of Dark Matter (DM) is by now well-established thanks to a variety of observations on many different scales, its nature is still unknown. In the context of DM indirect detection, the study of antiprotons propagating in our galaxy has nowadays become a fundamental tool for solving this mystery. Indeed, in the concordance model of astroparticle physics, antiprotons are believe ... More
Presented by Vivian POULIN
Session: Poster & Coffee
Board #: 205
It is well known that CMB is a very powerful tool to constraints Dark Matter decays, even if this decay happens in some invisible -so called "dark"- radiation. I would like to show that, in multi-component models, or more generally for non-trivial dark sector decoupled from standard model, CMB can constraints both lifetime and abundance of decaying dark matter into dark radiation (that could be pl ... More
Presented by Vivian POULIN on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 226
Nuclearites that are hypothetical super-heavy exotic particles and may be important components of the dark matter in our Universe. The nuclearites may have a typical velocity of ~220 km/s, whereas interstellar meteoroids will have geocentric velocities larger than 72 km/s corresponding to a sum of escape velocity from the solar system and the velocity of the earth around the Sun. We are studying t ... More
Presented by Fumiyoshi KAJINO on 18 Jul 2017 at 15:00
Session: DM(Dark Matter)
The Galactic Centre region is a key region for particle astrophysics at very high energies (VHE, E > 100 GeV) as observed with ground-based Imaging Atmospheric Cherenkov Telescopes. The Galactic Centre region harbors a large amount of dark matter. Given its proximity, it is one of the most promising targets to look for dark matter particle annihilations into VHE gamma-rays. The use of the spectral ... More
Presented by Emmanuel MOULIN on 19 Jul 2017 at 14:00
Session: DM(Dark Matter)
Many extensions of the Standard Model of particle physics predict a parallel sector of a new U(1) symmetry, giving rise to hidden photons. These hidden photons are candidate particles for cold Dark Matter. They are expected to kinetically mix with regular photons, which leads to a tiny oscillating electric-field component accompanying Dark Matter particles. A conducting surface can convert such Da ... More
Presented by Ralph ENGEL on 18 Jul 2017 at 16:30
Session: Poster & Coffee
Board #: 213
Many extensions of the Standard Model of particle physics predict a parallel sector of a new U(1) symmetry, giving rise to hidden photons. These hidden photons are candidate particles for cold Dark Matter. They are expected to kinetically mix with regular photons, which leads to a tiny oscillating electric-field component accompanying Dark Matter particles. A conducting surface can convert such Da ... More
Presented by Ralph ENGEL on 18 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 206
In this proceeding we describe the sensitivity of the IceCube Neutrino Observatory to the creation of axions and axion-like particles (ALPs) in a Galactic Core Collapse Supernova (CCSN). Axions are a light dark matter candidate, and their existence is well-motivated as a solution to the strong CP problem. In a supernova, axions behave much like neutrinos, effciently removing energy from the explos ... More
Presented by Robert CROSS on 18 Jul 2017 at 15:00
Session: DM(Dark Matter)
The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a wide field-of-view observatory sensitive to 0.5 TeV - 100 TeV gamma-rays and cosmic-rays in the State of Puebla, Mexico at an altitude of 4100m. The HAWC observatory performed an indirect search for dark matter via GeV-TeV photons resulting from dark matter annihilation and decay considering various sources, including dwarf sphero ... More
Presented by Andrew J SMITH​ on 19 Jul 2017 at 13:45
Session: Poster & Coffee
Board #: 222
The Ultra High Energy Cosmic Rays (UHECR) origin is still a puzzle. It lies in observation of primary particles with energies up to ~ 10^20 eV. If they are extragalactic (EG) protons with sources distributed uniformly in the Universe, their spectrum must expose steepening, starting at ≈ 3∙10^19 eV due to interaction with microwave photons (GZK-cutoff). The excess of observed events above the c ... More
Presented by Oleksandr SUSHCHOV on 18 Jul 2017 at 15:00
Session: DM(Dark Matter)
It is proposed that the relatively inert, highly symmetric, flavor singlet scalar hadron made of uuddss quarks called the H dibaryon, may have a mass < 2 m_p. This is consistent with QCD theory, and with existing accelerator and non-accelerator constraints. For mass in the 1.5-1.8 GeV range, the observed DM relic abundance and the observed DM to ordinary matter (OM) ratio are naturally explained. ... More
Presented by Glennys FARRAR on 19 Jul 2017 at 18:15
Session: Poster & Coffee
Board #: 218
The search for dark matter is a priority goal for neutrino telescopes. These experiments are particularly sensitive to spin-dependent cross-sections for WIMP-nucleon scattering (in the Sun) and WIMP-annihilation cross-sections (in the Galactic Centre). Up to now, these searches have not translated into a discovery, so more sensitive detectors are needed. The KM3NeT collaboration has started the co ... More
Presented by Christop TOENNIS on 18 Jul 2017 at 15:00
There are plenty of evidence that the universe is filled dominantly with unknown matter. After decades of intense search for this dark matter, we still don’t have clear identity for it. The range of theoretical models hypothesizing the identity are widened, and generally we don’t have strong preference to any specific model yet. In addition to the searches for the dark matter particles at LHC, ... More
Presented by Yeongduk KIM on 19 Jul 2017 at 09:15
Session: High Light Talks
Astrophysical observations at all scales provide undisputable evidence for the existence of an invisible and dominant mass component in the observable universe. The nature of this dark matter remains one of the greatest challenges of modern physics. The leading hypothesis is that dark matter is made of new elementary particles, with a vast range of masses and interaction cross-sections with normal ... More
Presented by Elena APRILE on 19 Jul 2017 at 10:30
We calculate the high energy gamma-ray emission expected during the periastron passage of the pulsar PSR J2032+4127 which form extended binary system with the massive companion star MT91 213. The gamma-ray emission is expected due to the comptonization of the stellar radiation by electrons accelerated at the pulsar wind and stellar wind collision shock. We apply the numerical code for the cascade ... More
Presented by Piotr BANASINSKI on 19 Jul 2017 at 14:45
Session: Poster & Coffee
Board #: 172
Current pair conversion event generators (e.g. geant4 and EGS5 physics models) don't sample the five-dimensional differential cross section (5D DCS), but instead a product of 1D DCSs. In addition, most of them use high-energy and/or small angle approximations. Also the electron and positron polar angles are often generated independently so that energy-momentum is not conserved. Few of them can sim ... More
Presented by Denis BERNARD on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 152
A significant part of long Gamma-ray Bursts (GRBs) shows delayed hard GeV gamma-ray emission in addition to the dominant emission observed in the keV-MeV energy range. We argue that such emission can appear when the anisotropic explosion of a massive star occurs in a dense stellar cluster. Then, the delayed GeV gamma-rays can be produced when the hyper-relativistic jet encounters the radiation of ... More
Presented by Wlodek BEDNAREK on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 091
In the context of the development of the Cherenkov Telescope Array, we have conceived and implemented a multi-objective genetic algorithm (GA) code for the optimisation of an array of Imaging Atmospheric Cherenkov Telescopes (IACTs). The algorithm takes as an input a series of cost functions (metrics) each describing a different objetive of the optimisation (such as effective area, angular resolut ... More
Presented by Ugo GIACCARI on 13 Jul 2017 at 15:00
GRB study is one of the main goals of the Lomonosov space mission. Multimessenger GRB observation is the only way of progress achievement in their study. The Lomonosov satellite is the first space mission in which the multi-wave length observations of GRBs are realized in real time without necessity of optical instrument re-orientation on GRB monitor trigger. The mission payload includes the GRB m ... More
Presented by Vitaly BOGOMOLOV on 18 Jul 2017 at 13:45
Session: Poster & Coffee
Board #: 114
POLAR is a compact wide field space-borne detector dedicated for precise measurements of the linear polarization of hard X-rays emitted by transient sources in the energy range from 50 keV to 500 keV. It consists of 1600 plastic scintillator bars grouped in 25 detector modules that are used as gamma-ray detection material. Its energy range sensitivity is optimized for detection of the prompt emiss ... More
Presented by Hualin XIAO, Wojtek HAJDAS on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 079
The LIGO/Virgo collaboration has recently discovered gravitational wave “bursts” emitted from coalescing massive compact objects. It is possible that these events have an electromagnetic counterpart. Gravity-wave detectors have very poor position resolution, making follow-up observations by narrow-field telescopes challenging. The High Altitude Water Cherenkov (HAWC) Observatory is a wide-fiel ... More
Presented by Andrew SMITH on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 151
Eventdisplay is a software package for the analysis and reconstruction of data and Monte Carlo events from ground-based gamma-ray observatories such as VERITAS and CTA. It was originally developed as a display tool for data from the VERITAS prototype telescope, but evolved into a full analysis package with routines for calibration, FADC trace integration, image and stereo parameter analysis, respo ... More
Presented by Gernot MAIER on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 254
Searching for new astrophysical sources is an important physical goal of current and nearly further ground-based gamma-ray detectors, such as HAWC, LHAASO and CTA. The gamma ray signal appears as an excess number of events. The significance of the excess is estimated using statistical method and is used to determine whether to accept the signal or not. Up to now, four main statistical methods, inc ... More
Presented by Songzhan CHEN on 13 Jul 2017 at 15:00
The η Carinae binary system hosts one of the most massive stars, which features the highest known mass-loss rate. This dense wind encounters the much faster wind expelled by its stellar companion, dissipating mechanical energy in the shock, where particles can be accelerated up to relativistic energies and subsequently produce very high energy γ-rays. We used data from the Fermi Large Area Teles ... More
Presented by Roland WALTER on 13 Jul 2017 at 14:45
Session: Poster & Coffee
Board #: 129
It is suggested that the extremely fast TeV gamma-ray flare from the radio galaxy IC 310 might originate in the magnetosphere of a supermassive black hole. If such flares are produced also in the surrounding of SMHBs in blazars then VHE gamma-rays have to propagate in the radiation field of the jet before reaching an observer. We investigate the scenario in which VHE gamma rays initiate electromag ... More
Presented by Piotr BANASINSKI on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 248
Recently, increasing attention is being payed to the solar gamma-rays, which are mainly produced by the hadronic interactions of cosmic rays with the solar atmosphere. The solar gamma-rays with energy up to 100 GeV have been observed by Fermi. Some theoretical works have been done to estimate the flux of solar gamma-rays, while the measurement result cannot be reproduced. In this work, we will est ... More
Presented by Baosheng GAO on 13 Jul 2017 at 15:00
The Fermi-LAT data accumulated over 7 years of gamma-ray observations, together with the high resolution gas (CO & HI) and the dust opacity maps, are used to study the emissivity of gamma-rays induced by interactions of cosmic rays (CRs) with the interstellar medium. Based on the dust opacity templates, the gamma-ray emissivity was measured for 36 segments of the Galactic plane. Furthermore, the g ... More
Presented by Ruizhi YANG on 18 Jul 2017 at 13:45
Session: Poster & Coffee
Board #: 164
We report the detailed analysis of Fermi Large Area Telescope’s data towards the direction of the young massive star cluster NGC 3603 and Westerlund 2. The emissions show a hard spectrum with a photon index of about -2 from 1 GeV to 250 GeV. The spatial correlation with the ionised gas indicates a hadronic origin. The total cosmic ray (CR) protons energy budgets in both systems are estimated to ... More
Presented by Ruizhi YANG on 13 Jul 2017 at 15:00
We will report on the Third Catalog of Hard Fermi-LAT Sources (3FHL) built from data taken with the Fermi Large Area Telescope (LAT). This catalog describes the gamma-ray sky at energies above 10 GeV relying on the first 7 years of LAT data using the Pass 8 event-level analysis. The 3FHL contains 1556 sources characterized in the 10 GeV--2 TeV energy range. The sensitivity and angular resolution a ... More
Presented by Alberto DOMINGUEZ
Session: Poster & Coffee
Board #: 113
Gamma Ray Bursts (GRBs) are the strongest explosions in the universe commonly associated with creation of black holes. Magnetic field structure and burst dynamics influence polarization of the promptly emitted gamma-rays. Thus, precise detection of the polarization can be an ultimate tool to unveil GRB mechanisms. Dedicated polarization measurement are currently conducted by a new instrument POLAR ... More
Presented by Hualin XIAO on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 173
A Large Size air Cherenkov Telescope (LST) prototype, proposed for the Cherenkov Telescope Array, is under construction at the Canarian Island of La Palma (Spain) this year. The LST camera, which comprises of an array of photomultipliers (PMTs), requires a precise and regular calibration over a large dynamic range. We present a system built to provide the optical calibration of the camera consisti ... More
Presented by Michele PALATIELLO on 13 Jul 2017 at 15:00
In order to provide an interpretation of X-ray and gamma-ray emission spectra of jets in Active Galactic Nuclei a detailed knowledge of particle acceleration at dissipation sites is required. In the case of blazars, the dissipation of jet energy may involve mildly relativistic magnetized internal shocks with Lorentz factor of γ ≤ 2. Of special interest for the emission modeling is the level of ... More
Presented by Arianna LIGORINI on 13 Jul 2017 at 18:00
Session: Poster & Coffee
Board #: 179
The Cherenkov Telescope Array (CTA) will be the next generation observatory employing different types of Cherenkov telescopes for the detection of particle showers initiated by very high energy gamma-rays. A good knowledge of the Earth's atmosphere, which acts as a calorimeter in the detection technique, will be crucial for calibration in CTA. Variations of the atmosphere's transparency to Cherenk ... More
Presented by Stanislav STEFANIK on 13 Jul 2017 at 15:00
The Cherenkov Telescope Array (CTA) will be the largest ground-based very-high-energy gamma-ray detection observatory in the world with more than one hundred telescopes located in two sites in the northern and southern hemispheres. The energy coverage, in the southern CTA array, will extend up to hundreds of TeV thanks to a large number (up to 70) of small size telescopes, with their primary mirro ... More
Presented by Maria Concetta MACCARONE on 14 Jul 2017 at 17:45
Session: Poster & Coffee
Board #: 185
The Cherenkov Telescope Array (CTA) is an international initiative to build the next generation of ground-based very-high-energy gamma-ray instruments. Full sky coverage will be assured by two arrays, with one site located in each of the northern and southern hemispheres. Three different sizes of telescopes (large, medium, small) will cover the wide energy range from tens of GeV up to hundreds of ... More
Presented by Maria Concetta MACCARONE on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 240
A Sun/Moon photometer CE318-T is part of the auxiliary scientific instrumentation developed for the atmosphere monitoring and calibration of the Cherenkov Telescope Array (CTA). The photometer allows an understanding of the detailed characteristics of the atmospheric extinction and the underlying particulates, mainly aerosols. The photometer can measure daytime and night-time evolution of the inte ... More
Presented by Jakub JURYSEK on 13 Jul 2017 at 15:00
Supernova remnants are believed to be one of the major sources of Galactic cosmic rays. SNR CTB 37A is known to be interacting with several dense molecular clouds as traced by OH 1720 MHz maser. Radio and X-ray observations of the SNR confirm a mixed-morphology classification of the remnant. The TeV gamma ray source HESS J1714-385 is coincident with the SNR, though it’s still not clear whether t ... More
Presented by Soheila ABDOLLAHI on 17 Jul 2017 at 13:30
The polarization parameters of high energy photons from Gamma-Ray Bursts are thought to hold a wealth of information on the nature of these transient events. To date several GRB polarization measurements have been performed, including some by a dedicated instrument, however both the small number of measurements and a lack of precision has made it impossible to exclude any of the existing GRB emiss ... More
Presented by Merlin KOLE on 18 Jul 2017 at 14:00
Session: Poster & Coffee
Board #: 107
IceCube has discovered an unresolved and isotropic flux of neutrinos between 10 TeV and 8 PeV. An extragalactic origin for this flux is usually assumed, as well as a correlation with the sources of cosmic rays. To date, no clear association with a class of objects has been made. HAWC is a very high energy gamma ray observatory in operation in central Mexico. HAWC has studied 2/3 of the sky above a ... More
Presented by Joshua WOOD on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 203
Observations of high energy gamma rays are an essential probe of the cosmic-ray acceleration mechanisms because they are created by cosmic rays interacting near their origin. The characteristics of the gamma-ray flux variability and spectra constrain the acceleration mechanisms and the environment of the accelerator. Detection of the highest energy gamma rays and the shortest timescales of variabi ... More
Presented by Miguel MOSTAFA on 13 Jul 2017 at 15:00
We report on the detection of flaring activity from the prominent Fanaroff-Riley I radio galaxy NGC 1275 located in the Perseus cluster of galaxies in the very-high-energy gamma-ray band. The observations were performed with the MAGIC telescopes between 2016 and 2017 over several months. During this time period, the mean flux above 100 GeV was measured to be ten times brighter than during previous ... More
Presented by Dorit GLAWION on 13 Jul 2017 at 16:30
In this work we estimate the gamma-ray emission from hadronic interactions produced by cosmic rays (CR) accelerated in Galactic sources that remain confined around their sources for a time longer than the one estimated using the average Galactic diffusion coefficient. The confinement is due to magnetic turbulence that CRs self-produce during the escaping process in a region around the source where ... More
Presented by Giovanni MORLINO on 19 Jul 2017 at 14:00
Session: Poster & Coffee
Board #: 253
The gamma-ray binary system PSR B1259-63/LS 2883 consists of a 48 ms pulsar in a highly eccentric ~3.4 yr orbit around a massive companion Be star. The observed TeV light curve features a decrease in flux at periastron which has not been fully explained by emission mechanisms alone. An observed decrease can, however, be explained by gamma-gamma absorption caused by stellar and disk photons. We det ... More
Presented by Iurii SUSHCH on 13 Jul 2017 at 15:00
Compact binary systems can provide us with unique information on astrophysical particle acceleration and cosmic ray production. However, only five binary systems have ever been observed in the regime of TeV gamma rays. The High Altitude Water Cherenkov (HAWC) Observatory has high uptime (duty cycle >95%) and a wide field of view (2 sr.), making it well-suited for observing transient sources such a ... More
Presented by Chang Dong RHO on 13 Jul 2017 at 17:30
Session: Poster & Coffee
Board #: 156
Galactic diffuse emission has provided us with the evidence for the cosmic ray acceleration throughout the Galaxy and the background for searches of physics beyond the Standard Model. However, only the very limited measurements of diffuse flux are available in TeV gamma rays. The High Altitude Water Cherenkov (HAWC) observatory is well-suited for observing the diffuse emission of high energy with ... More
Presented by Chang Dong RHO on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 216
High level of single noise rate is one of the difficult problems of the LHAASO-WCDA, that leads to a stage of an online process of the data with a noise filtering method, which iterates many sky cells for locating the direction of the triggered air shower events. Other than the Central Processing Unit (CPU), the Graphics Processing Unit (GPU) can extensively speed up the data processing while cons ... More
Presented by Dezhi HUANG on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 229
Among several detector components of the Large High Altitude Air Shower Observatory (LHAASO), the Water Cherenkov Detector Array (WCDA) is of great importantance for gamma ray astronomy from 100 GeV to 30 TeV. High level of single noises persisting in the triggered events imposes a significant problem for the event reconstruction of the experiment. A solution to the problem has to delicately refin ... More
Presented by Xiaojie WANG on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 246
The Water Cherenkov Detector Array (WCDA), which is one of the main components of the Large High Altitude Air Shower Observatory (LHAASO), functions as surveying the northern sky for high-energy gamma ray sources at the energy range around 100 GeV--30 TeV. Aiming a good observation, the accuracy of the time offsets among detector cells is required to be less than 0.2 ns. Besides the dedicated time ... More
Presented by Minjun CHEN on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 227
lettrine[nindent=0em,lines=3]{D}iscovered by Hess during some experiments about air ionization, cosmic rays are constituted by particles coming from the space. In the past, cosmic rays allowed the development of Particle Physics; indeed, thanks to their high energy not achievable in laboratories, they enabled new particles discovery. Today, interest about this radiation concerns both Astrophysics ... More
Presented by Fausto CASABURO on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 150
The Cherenkov Telescope Array (CTA) will be the world's largest and by far most sensitive observatory for high-energy gamma rays. It will be capable of detecting gamma rays from extremely faint sources with unprecedented precision on energy and direction in the energy range from 20 GeV to more than 300 TeV. The design optimisation and performance of the future observatory derived from detailed Mon ... More
Presented by Gernot MAIER on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 230
The Cherenkov Telescope Array (CTA) is the next generation of Imaging Atmospheric Cherenkov Telescopes. It will reach a sensitivity and energy resolution never obtained until now by any other high energy gamma-ray experiment. Understanding the systematic uncertainties in general will be a crucial issue for the performance of CTA. It is well known that atmospheric conditions contribute particularly ... More
Presented by Georges VASILEIADIS on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 188
The SST-1M is a 4-m Davies-Cotton atmospheric Cherenkov telescope optimized to provide gamma-ray sensitivity above a few TeV. A prototype has been deployed and is proposed as part of the Small-Size Telescope array for the Cherenkov Telescope Array (CTA). The SST-1M control software of all subsystems (active mirror control, drive system, safety system, photo detector plane, Digicam, CCDs) and the w ... More
Presented by Roland WALTER on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 187
The Cherenkov Telescope Array (CTA) will operate several types of telescopes and cameras. The individual camera trigger rates will vary much - from 0.6 to 15 kHz - while the content of the raw data will be heterogeneous. Raw data streams of up to 43 Gbps per telescope must be handled efficiently, from the camera front-ends down to the on-site repository and real-time analysis. In addition, the sys ... More
Presented by Roland WALTER on 13 Jul 2017 at 15:00
Extragalactic jets are the largest particle accelerators in the universe, producing radiation ranging from radio wavelengths up to very high-energy gamma rays. Spatial origin of gamma-ray radiation from these sources cannot be fathom due to the poor angular resolution of the detectors. We propose to investigate gravitationally lensed blazars. Cosmic lenses magnify the emission and produce time del ... More
Presented by Anna BARNACKA on 19 Jul 2017 at 14:30
The Cherenkov Telescope Array is a next generation ground-based gamma-ray observatory designed to detect photons in the 0.02 to 300 TeV energy range. With a sensitivity improvement of one order of magnitude over currently operating facilities, coupled with significantly better angular resolution, the array will be used to address many open questions in high-energy astrophysics. In addition, CTA wi ... More
Presented by Roberta ZANIN on 15 Jul 2017 at 14:45
Session: Poster & Coffee
Board #: 202
The Large High Altitude Air Shower Observatory (LHAASO) is going to be built at an altitude of 4410 meters in Daocheng, Sichuan Province, China. The Water Cherenkov Detector Array (WCDA), one of the major components of the LHAASO project, focuses on surveying the Northern sky for gamma ray sources in a wide energy range (0.1 to 30 TeV). One of the main tasks of the data analysis of the WCDA is to ... More
Presented by Min ZHA on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 116
We analyzed Suzaku/XIS data (2006-2015) and Fermi/LAT data (2008-2015) of the gamma-ray emitting radio galaxy NGC 1275 and monitored it with the Kanata optical telescope. A brightening of the nucleus in both the X-ray and GeV gamma-ray energy bands was found in 2013-2015. This is the first evidence of variability with correlation between X-ray and GeV gamma-rays for NGC 1275. We also analyzed Swif ... More
Presented by Yasushi FUKAZAWA on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 235
POLAR is a Compton polarimeter with 1600 pixels designed to measure the polarization of Gamma-Ray Bursts (GRBs). POLAR has been launched successfully onboard the Chinese space laboratory Tiangong-2 on 15th September 2016. The anisotropy of Compton scattering is used as the characteristic quantity of polarization degree and angle. The scattering angles are accumulated into a modulation curve and co ... More
Presented by Jiro SHIMODA on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 244
In order to search for GRBs above the GeVs energy range, high duty cycle and a wide field of view ground-based experiments in high altitude sites is needed. At present, the Water Cherenkov Detectors (WCD) Prototype using the single particle technique are developed in Tibet University of China) for detecting GRBs. In this paper, prototype development of the WCD is reported.
Presented by Maoyuan LIU on 13 Jul 2017 at 15:00
It is generally assumed that fluorescence radiation does not play a significant role in the performance of Cherenkov telescopes. This assumption is put to the test of detailed Monte Carlo simulations. To this end we have implemented the production and tracking of fluorescence radiation inside the CORSIKA code, and generated gamma-ray induced showers in the VHE energy range. The most accurate fluor ... More
Presented by Fernando ARQUEROS on 17 Jul 2017 at 17:00
A full scale 9.7m Schwarzschild-Couder Telescope (SCT) is a prototype for the Medium Size Telescopes (MSTs) of the Cherenkov Telescope Array (CTA). The SCT-MST has been proposed as an instrument capable to achieve the ultimate performance of the imaging atmospheric Cherenkov technique in the energy range from 100 GeV to 10 TeV in the CTA installation. The SCT employs an aplanatic two-mirror optica ... More
Presented by Vladimir VASSILIEV on 18 Jul 2017 at 14:45
We present a novel interpretation of the gamma-ray diffuse emission measured by H.E.S.S. in the Galactic Center (GC) and the Central Molecular Zone (CMZ) regions. We start with a data driven analysis based on PASS8 Fermi-LAT data which allows to extend down to few GeV the spectra measured by H.E.S.S. and to infer the primary Cosmic Ray (CR) radial distribution above 100 GeV. We compare those resul ... More
Presented by Dario GRASSO on 19 Jul 2017 at 16:30
Gamma ray detected high-redshift blazars (z>3) are intrinsically interesting since they inform us about the evolution of gamma-ray blazars and are, by definition, some of the more luminous blazars in the Universe. It has been found in many studies that such high z blazars host extremely massive black holes (M_BH> 1e9 M_sun) and thus shed a new light on the formation of supermassive black holes in ... More
Presented by Dario GASPARRINI on 13 Jul 2017 at 18:00
Session: Poster & Coffee
Board #: 155
B1957+20 is a millisecond pulsar located in a black widow type compact binary system with a low mass stellar companion. The interaction of the pulsar wind with the companion star wind and/or the interstellar plasma is expected to create plausible conditions for acceleration of electrons and subsequent production of very high energy gamma rays in the inverse Compton process. We performed extensive ... More
Presented by Marcos LÓPEZ on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 142
The interstellar radiation field (ISRF) of the Milky Way is the result of emission by stars and re-processing of the starlight by dust in the interstellar medium. The ISRF is an essential input to cosmic-ray propagation codes for calculating the energy losses by leptons from inverse Compton scattering, and the resulting interstellar gamma-ray emission. To-date models for the ISRF have used a 2D Ga ... More
Presented by Troy PORTER on 13 Jul 2017 at 15:00
High-energy gamma rays of interstellar origin are produced by the interaction of cosmic-ray (CR) particles with the diffuse gas and radiation fields in the Galaxy. The main features of this emission are well-understood and are reproduced by existing CR propagation models employing 2D Galactocentric cylindrically symmetrical geometry. However, the high-quality data from instruments like the Fermi L ... More
Presented by Troy PORTER on 13 Jul 2017 at 13:30
MAGIC is a system of two Cherenkov telescopes designed to perform observations of gamma rays with energies from about 50 GeV to tens of TeV. A low energy threshold and an excellent low energy performance make it a powerful instrument for studies of high energy processes in active galactic nuclei. The MAGIC Collaboration dedicates about 40% of the telescopes' time to such observations, both monitor ... More
Presented by Julian SITAREK on 13 Jul 2017 at 13:45
Session: Poster & Coffee
Board #: 214
The upcoming CTA project is expected to provide unprecedented sensitivity in the low-energy (<~ 100 GeV) range for Cherenkov telescopes. In order to exploit fully the potential of the telescopes the standard analysis methods for gamma/hadron separation might need to be revised. We study the composition of the background by identifying events composed mostly of a single electromagnetic subcascade o ... More
Presented by Julian SITAREK on 13 Jul 2017 at 15:00
PKS1510-089 is a flat spectrum radio quasar located at a redshift of 0.36. It is one of only a few such sources detected in very-high-energy (VHE, >100 GeV) gamma rays. Though PKS1510-089 is highly variable at GeV energies, until recently no variability has been observed in the VHE band. In 2015 May PKS1510-089 showed a high state in optical and in the GeV range. MAGIC observations performed at th ... More
Presented by Adrian BILAND on 13 Jul 2017 at 17:30
Session: Poster & Coffee
Board #: 176
The Gamma-ray Cherenkov Telescope (GCT) is an innovative dual-mirror solution proposed for the Small-Size-Telescopes of the future Cherenkov Telescope Array (CTA), capable of imaging the showers induced by cosmic gamma-rays with energies from a few TeV up to 300 TeV. The Schwarzschild-Couder design on which the telescope optical design is based makes possible the construction of a fast telescope ( ... More
Presented by Cedric PERENNES on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 080
The High-Altitude Water Cherenkov Observatory is a large field of view (~2sr) observatory sensitive to very-high energy gamma rays (~0.5-100TeV). It is located in central Mexico (19˚N) and has a high duty cycle (~95%). These characteristics allow it to continuously monitor ~2/3 of the sky, looking for transient events, such as flares from Active Galactic Nuclei or possibly other unknown phenomena ... More
Presented by Israel MARTINEZ-CASTELLANOS on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 250
The Weibel instability occurs in collisionless plasma with anisotropic temperature and generates magnetic fields, which is thought to be a crucial role for particle acceleration and magnetic field generation in relativistic collisionless shocks. According to observations of afterglows of Gamma-ray Busts (GRB), magnetic fields are strongly amplified to about 100 times the shock-compressed value in ... More
Presented by Sara TOMITA on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 140
The positron excess measured by PAMELA and AMS can only be explained if there is one or several sources injecting them. Moreover, at the highest energies, it requires the presence of nearby (~hundreds of parsecs) and middle age (maximum of ~hundred of kyr) source. Pulsars, as factories of electrons and positrons, are one of the proposed candidates to explain the origin of this excess. To calculate ... More
Presented by Ruben LOPEZ-COTO on 13 Jul 2017 at 15:00
Gamma-ray observations of microquasars at high and very-high energies can provide valuable information of the acceleration processes inside the jets, the jet-environment interaction and the disk-jet coupling. Two high-mass microquasars have been deeply studied to shed light on these aspects: Cygnus X-1 and Cygnus X-3. Both systems display the canonical hard and soft X-ray spectral states of black ... More
Presented by Alba FERNANDEZ-BARRAL on 13 Jul 2017 at 17:15
Session: Poster & Coffee
Board #: 134
Pulsar Wind Nebulae (PWNe) or plerions represent the most numerous population of TeV sources in our galaxy. These sources, some of which emit very-high-energy (VHE) gamma-rays, are believed to be related to the young and energetic pulsars that power highly magnetized nebulae (a few uG to a few hundred uG). In this scenario, particles are accelerated to VHE along their expansion into the pulsar sur ... More
Presented by Alba FERNÁNDEZ-BARRAL on 13 Jul 2017 at 15:00
PKS 1510-089 (z=0.361) is one of only a handful of flat spectrum radio quasars that have been detected at very high energy (VHE, E>100GeV) gamma-rays. It is a very active source across the entire electromagnetic spectrum. VHE observations in May 2016 with H.E.S.S. and MAGIC revealed an exceptionally strong flare, which lasted for less than two nights, and exhibited a peak flux of about 0.8 times t ... More
Presented by Michael ZACHARIAS on 13 Jul 2017 at 17:15
Session: Poster & Coffee
Board #: 083
The flat spectrum radio quasar (FSRQ) PKS 1510-089 (z=0.361) is known for its complex multiwavelength behavior. It has been monitored regularly at very high energy (VHE, E>100GeV) gamma-rays with H.E.S.S. since its discovery in 2009 in order to study the unknown behavior of FSRQs in quiescence at VHE, as well as the flux evolution around flaring events. Given the expected strong cooling of electro ... More
Presented by Michael ZACHARIAS on 13 Jul 2017 at 15:00
2HWC J1928+178 is a source recently discovered at TeV energies in the second HAWC catalog. It is coincident with the Fermi unidentified source 3FGL J1928+1739 and the pulsar PSR J1928+1746, which is 83 kyr old and located at a distance of 5 kpc with an Edot=1.6 x 10$^{36}$ erg/s. 2HWC J1928+178 is not detected by any of the IACTs currently in operation, which puts strong constrains on the morpholo ... More
Presented by Ruben LOPEZ-COTO on 15 Jul 2017 at 18:15
Session: Poster & Coffee
Board #: 124
The H.E.S.S. Imaging Air Cherenkov Telescope system is, due to its fast reaction time and its comparably low energy threshold, very well suited to perform follow-up observations of detections at other wavelengths or other messengers like high-energy neutrinos and gravitational waves. These advantages are utilized optimally via a fully automatized system reacting to alerts from various partner obse ... More
Presented by Fabian SCHÜSSLER on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 125
The very-high-energy (VHE; E>100 GeV) extragalactic sky is dominated by blazars, a class of active galactic nuclei which show rapid variability at all wavelengths. Target of Opportunity (ToO) observations triggered by flaring activity detected at longer wavelengths are thus an important part of the blazar observing strategy of H.E.S.S., an array of five imaging atmospheric Cherenkov telescopes sen ... More
Presented by Fabian SCHÜSSLER on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 161
To investigate the nature and evolution of TeV pulsar wind nebulae, we examine the firmly identified PWNe in the H.E.S.S. Galactic Plane Survey, along with the few other known detections from the literature, as well as the upper limits extracted from the H.E.S.S survey. These data exhibit a correlation of TeV surface brightness with pulsar spin-down power. It appears to be caused by both an increa ... More
Presented by Stefan KLEPSER on 13 Jul 2017 at 15:00
Observations of high-energy cosmic $gamma$-rays provide us with direct information of high-energy phenomena in the universe. Fermi-LAT is observing a $gamma$-ray sky and offering new insights. On the other hand, past and current observations have some limitations. Improvements in an angular resolution and polarization sensitivity are one of keys for a breakthrough of the limitations. We are develo ... More
Presented by Satoru TAKAHASHI on 14 Jul 2017 at 14:15
Session: Poster & Coffee
Board #: 160
In 2015/16, the photomultiplier cameras of the H.E.S.S. Cherenkov telescopes CT1-4 have undergone a major upgrade. The entire electronics has been replaced, using NECTAr chips for the front-end readout. A new ventilation system has been installed and several auxiliary components have been replaced. Besides this, also the internal control and readout software was rewritten in a modern and modular w ... More
Presented by Stefan KLEPSER on 13 Jul 2017 at 15:00
The Large Magellanic Cloud (LMC) is an irregular satellite galaxy of the Milky Way. The Fermi-LAT has recently discovered periodic GeV gamma-ray emission from a binary system in the LMC, LMC P3, with a period of ~10.3 days. The LMC has been observed extensively at Very-High-Energy (VHE) gamma-rays with the H.E.S.S. telescopes. Significant VHE gamma-ray emission has been detected from LMC P3, with ... More
Presented by Nukri KOMIN on 13 Jul 2017 at 17:00
Atmospheric monitoring is an integral part of the design of the Cherenkov Telescope Array (CTA), as atmospheric conditions affect the observations by Imaging Atmospheric Cherenkov Telescopes (IACT) in multiple ways. The variable optical properties of the atmosphere are a major contribution to the systematic uncertainty in the determination of the energy and flux of the gamma photons. Both the deve ... More
Presented by Jan EBR on 14 Jul 2017 at 18:00
A few Galactic objects are known to be variable sources of photons with energies above 100 GeV. These systems are mostly binaries, where variability can generally be connected to the orbital period, although particle acceleration and gamma-ray production processes are not well understood. We present here an overview of the VERITAS binary discovery program at VHE energies and a summary of eleven ye ... More
Presented by Gernot MAIER on 13 Jul 2017 at 16:30
Session: Poster & Coffee
Board #: 130
Massive black holes in active galaxies are surrounded by bulges of both late-type and young luminous stars in nuclear stellar clusters. The luminous stars can enter a jet region which contains fast moving blobs filled with relativistic electrons. We calculate the gamma-ray spectra produced by such electrons in the Inverse Compton $e^pm$ pair cascade process. Such scenario can explain the appearanc ... More
Presented by Piotr BANASINSKI on 13 Jul 2017 at 15:00
We report on the VERITAS detection of very-high-energy (VHE, E> 100 GeV) gamma-ray emission from the optically bright quasar OJ 287 which is located at a redshift of z = 0.306. OJ 287 has been observed to display regular optical outbursts with a period of approximately 12 years, with the last major optical outburst having occurred in 2015. In order to explain this periodicity, models involving a b ... More
Presented by Stephan O'BRIEN on 13 Jul 2017 at 14:30
In June 2015, the Flat Spectrum Radio Quasar 3C 279 underwent an extremely bright gamma-ray flare, with an increase of the flux above 100 MeV by a factor 10 in less than 1 day, revealing an intrinsic variability timescale of 2 minutes as detected by the Fermi-LAT. We present results of target of opportunity observations with the H.E.S.S. experiment on this source over the nights around the peak of ... More
Presented by Carlo ROMOLI on 13 Jul 2017 at 16:45
Session: Poster & Coffee
Board #: 146
Supernova remnants (SNRs) are widely considered to be the origin of Galactic cosmic rays. The SNR Vela Jr. (RX J0852.0-4622) is one of the prime sources for studies of particle acceleration aiming to test this paradigm due to its strong non-thermal emission across the whole electromagnetic spectrum, spanning from radio to very-high-energy (VHE, E>100 GeV) gamma-rays, and to its young age and proxi ... More
Presented by Nukri KOMIN on 13 Jul 2017 at 15:00
The detections of fast TeV gamma-ray flares from blazars since the late 1990s have made substantial contributions to advance our understanding of these objects. These extreme flares have posed challenges to blazar models, and led to the development of new models (e.g. localized regions of magnetic reconnection, and plasma passing a standing shock). However, there are only a handful of such flares ... More
Presented by Qi FENG on 13 Jul 2017 at 17:45
The Water Cherenkov Detector Array (WCDA) is an important component of Large High Altitude Air Shower Observatory (LHAASO), which mainly aims at surveying the northern sky for VHE gamma ray sources. The WCDA has an area of 78,000 m2, and is sub-divided into 3,120 cells by black curtains, with a PMT deployed in each cell. Currently, the R&D is finished. In this talk, the basic design, performance a ... More
Presented by Mingjun CHEN on 14 Jul 2017 at 16:30
Session: Poster & Coffee
Board #: 181
We built a large (approximately 4,000 m**2) water Cherenkov- type muon detector array under the existing Tibet air shower array at 4,300 m above sea level, to observe 10-1000 TeV gamma rays from cosmic-ray accelerators in our Galaxy with wide field of view at very low background level. A gamma-ray induced air shower has significantly less muons compared with a cosmic-ray induced one. Therefore, ... More
Presented by Masato TAKITA on 13 Jul 2017 at 15:00
We report on the Fermi High-Latitude Extended Sources Catalog (FHES), a comprehensive search for spatially extended gamma-ray sources at high Galactic latitudes based on data from the Fermi Large Area Telescope (LAT). While the majority of high-latitude LAT sources are extragalactic blazars that appear point-like within the LAT angular resolution, there are several physics scenarios that predict t ... More
Presented by Matthew WOOD on 19 Jul 2017 at 14:15
Session: Poster & Coffee
Board #: 171
Novel gamma-ray telescope schemes are under development so as to bridge the 0.1-100 MeV sensitivity gap of gamma-ray astronomy (Compton, pair creation), (silicon wafer stacks, emulsions, gas detectors). The lower average density with respect, e.g. to the tungsten/silicon active target of the Fermi-LAT makes square-meter effective area telescopes voluminous objects, for which the photon energy meas ... More
Presented by Denis BERNARD on 13 Jul 2017 at 15:00
Session: Poster & Coffee
Board #: 228
The Water Cherenkov Detector Array (WCDA), which is one of the main components of the Large High Altitude Air Shower Observatory (LHAASO), functions as surveying the northern sky for high-energy gamma ray sources at the energy range around 100 GeV--30 TeV. The precision of the time measurement for shower particles hitting every detector in the array directly associates the detection sensitivity fo ... More
Presented by Bo GAO on 13 Jul 2017 at 15:00
Imaging Atmospheric Cherenkov Telescopes study the highest energy (up to tens of TeV) photon emission coming from nearby and distant astrophysical sources, thus providing valuable results from searches for Lorentz Invariance Violation (LIV) effects. Highly variable, energetic and distant sources such as Pulsars and AGNs are the best targets for the Time-of-Flight LIV studies. However, the limited ... More
Presented by Leyre NOGUÉS on 19 Jul 2017 at 13:30
Session: Poster & Coffee
Board #: 100
Observations of the HBL object 1RXS J023832.6-311658 were made in 2013, 2015 and 2016 with the High Energy Stereoscopic System (H.E.S.S.). An excess of very high energy (VHE: > 100 GeV) gamma rays is clearly observed. The broad-band spectral energy distribution including the VHE spectrum will be presented. This object shows no evidence for any temporal variation has a hard spectrum at TeV energies ... More
Presented by Florian GATÉ on 13 Jul 2017 at 15:00
Sub-milliarcsecond imaging of nearby main sequence stars and binary systems can provide critical information on stellar phenomena such as rotational deformation, accretion effects, and the universality of starspot (sunspot) cycles. Achieving this level of resolution in optical wavelength bands (U/V) requires use of a sparse array of interferometric telescopes with telescope baseline separations ex ... More
Presented by David KIEDA on 19 Jul 2017 at 18:00
Session: Poster & Coffee
Board #: 105
Photon counts statistics have been shown to provide a sensitive tool for characterizing gamma-ray source populations and the composition of the gamma-ray sky. In this contribution, we extend the use of the standard 1-point probability distribution function (1pPDF) to decompose the high-latitude gamma-ray flux observed with Fermi-LAT into emission from point sources, Galactic foreground, and a diff ... More
Presented by Hannes ZECHLIN on 13 Jul 2017 at 15:00
The ALPACA (Andes Large area PArticle detector for Cosmic ray physics and Astronomy) experiment is aimed at observing cosmic gamma rays above 10 TeV in the southern sky with wide field