BEXCO - Room B(103/104/105)
[CRI125] TA spectrum summary
- Yoshiki TSUNESADA
- Yoshiki TSUNESADA (Osaka City University, Japan)
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 TA SD, which has the largest statistics, the FD monocular spectrum, the FD-SD hybrid spectrum, and the lower energy spectrum obtained by TALE. We discuss the declination dependence of the energy spectrum in the northern sky. A comparison of energy spectra obtained with a standard method, the number of events in the energy bin per exposure, and with a event number counting weight with a declination-dependence exposure, so called the "1/omega" method, will also be given.