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Semaine de l'Astrophysique Française - Journées de la SF2A, Paris : France (2008)
Measurement of the UHECR energy spectrum using data from the surface detector of the Pierre Auger Observatory
B. Rouillé-D'Orfeuil1
PIERRE AUGER Collaboration(s)

We report a measurement of the cosmic ray energy spectrum based on the high statistics collected by the surface detector of the Pierre Auger Observatory. High-energy cosmic rays are measured by recording the extensive air shower of secondary particles they produce in the atmosphere. The properties of the CR, such as its energy, have to be inferred from the air showers. The methods developed to determine the spectrum from reconstructed observables are described in detail. The hybrid nature of the Pierre Auger Observatory, which combines a fluorescence detector and a surface detector, allows the energy calibaration of the observables. The methods are simple and robust and do not rely on detailed numerical simulation or any assumption about the chemical composition of the CRs.
1 :  APC - UMR 7164 - AstroParticule et Cosmologie
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique

Planète et Univers/Astrophysique

Physique/Astrophysique/Phénomènes cosmiques de haute energie

Planète et Univers/Astrophysique/Phénomènes cosmiques de haute energie