218 articles – 619 references  [version française]
 HAL: in2p3-00014067, version 1
 arXiv: astro-ph/0308512
 International Cosmic Ray Conference 28 ICRC 2003, Tsukuba : Japon
 Hybrid Performance of the Pierre Auger Observatory and Reconstruction of Hybrid Events
 For the PIERRE AUGER collaboration(s)
 (2003)
 The Pierre Auger Observatory is ahybrid'' UHECR detector. The surface detector (SD) and air fluorescence detector (FD) of the observatory are designed for observation of cosmic ray showers in coincidence, with a 10% duty cycle. The resulting data are expected to be superior in quality to those of either the SD or FD operating individually. Hybrid operation, triggering, data acquisition, and event reconstruction were successfully demonstrated during the prototype phase of the project. This paper focuses on 75 hybrid events recorded during a four month period of running with the prototype detectors in late 2001 and early 2002. The geometric technique for reconstruction of the hybrid events is described and its advantages over the traditional FD-only method are demonstrated. A lateral distribution for the water Cherenkov signals, derived from these data, is presented.
 Subject(s) : Physics/Astrophysics/Cosmology and Extra-Galactic Astrophysics