International School of Cosmic Ray Astrophysics

15^th  Course: "Astrophysics at Ultra-high Energies"

 20-27 June 2006
Ettore Majorana Centre
Erice, Sicily, Italy

Topic: Hybrid Analysis of Auger data
Lecturer: Paolo Privitera
 

A fundamental characteristics of the Auger Observatory is its capability of "hybrid" reconstruction of cosmic ray showers. Two independent detectors, the Surface Detector, which samples the shower particles at ground, and the Fluorescence Detector, which collects the fluorescence light emitted by the shower particles along their path in the atmosphere, are able to measure the energy and direction of the same cosmic ray shower. These hybrid showers allow for extensive cross-checks of the angular resolution and the energy scale of the experiment. In this lecture, the analysis tecniques developed for the reconstruction of the hybrid showers will be presented. The importance of the hybrid energy calibration in the measurement of the UHECR energy spectrum will also be explained.