The Energy Scale of the Pierre Auger Observatory

THE PIERRE AUGER COLLABORATION (AUTOR 434 DE 474); M. TUEROS

Rio de Janeiro

Conferencia; 33rd International Cosmic Ray Conference (ICRC 2013); 2013

International Union of Pure and Applied Physics (IUPAP)

Abstract: The energy scale of the Pierre Auger Observatory is derived  from fluorescence observations of extensive air showers, an intrinsically calorimetric technique. Taking advantage of more precise measurements of the fluorescence yield, of a deeper understanding of the detector and consequently improved event reconstruction and of a better estimate of the invisible energy, we present an update of the method used to determine the energy scale. Differences in energy with respect to earlier measurements and the systematic uncertainties associated with the new energy scale are discussed.