12-20 July 2017
Asia/Seoul timezone
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BEXCO - Room F(201/202/203/204)

[CRI157] The cosmic ray electron anisotropy measured with H.E.S.S.


  • Manuel KRAUS

Primary authors


  • Daniel KERSZBERG (Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE))
  • Stefan FUNK (Erlangen Centre for Astroparticle Physics)


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 sources and production by dark matter decay. The electron anisotropy studies carried out in the GeV-TeV range so far by AMS and Fermi/LAT use the advantage of the very wide field of view of these satellites to compute the expected mean electron exposure in the isotropic scenario. With its limited field of view per observation run the H.E.S.S. experiment cannot use the same techniques based on the global reshuffling of events but has to extract the expected exposure directly from each run. In this contribution several methods and their capability to constrain the all sky electron anisotropy on small to large angular scales are explored and possible limitations due to experiment and atmosphere systematic uncertainties are investigated.