Science and Detectors of the Pierre Auger Observatory

Details Science and Detectors of the Pierre Auger Observatory Science and Detectors of the Pierre Auger Observatory

2010-04-15

arxiv.org/abs/1004.2635v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

9 pages, Asociaci\'on Argentina de Astronom\'{\i}a BAAA, Vol. 52, 2009 J.J. Clari\'a, E. Brandi, A.E. Piatti and F.A. Bareille

Scientific paper

The high energy spectrum of cosmic rays presents three distinct traits, the second knee, the ankle, and the GZK cutoff and as such, a thorough understanding of cosmic rays encompasses the study of these three features. It is in the second knee - ankle region where cosmic ray sources change from a galactic origin to an extragalactic one. At the higher cutoff energies, the arrival directions show an anisotropy related to the near extragalactic sky. The Pierre Auger Observatory is currently designed to help to unravel these features by performing both spectrum and composition measurements with unprecedented accuracy. The primary particle type in the second knee - ankle region will be studied both with fluorescence telescopes and muon counters giving the air shower longitudinal profiles and muon contents, respectively.

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