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Karlsruhe 2011 – scientific programme

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T: Fachverband Teilchenphysik

T 101: Kosmische Strahlung IV

T 101.3: Talk

Wednesday, March 30, 2011, 17:15–17:30, 30.41: 004

Deriving upper limits on cosmic ray photon flux with the hybrid data of the Pierre Auger ObservatoryLorenzo Perrone1, Markus Risse2, and •Mariangela Settimo21University of Salento and INFN Lecce, Italy — 2University of Siegen, Germany

The detection of UHE photons is a key issue in cosmic ray physics with large impact on astrophysics, cosmology, particle and fundamental physics. The Pierre Auger Observatory has been designed to study the origin and nature of the highest energy cosmic radiation. It consists of a surface array detector overlooked by air fluorescence telescopes which together provide a powerful instrument for discriminating primary particles and searching for photons. Hybrid data have been used to derive upper limits on photon fraction in the EeV range. As a complement, the upper limits on photon flux in the same energy range are here derived. A revisited analysis and preliminary results are presented.

Supported by BMBF Verbundforschung Astroteilchenphysik

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