Search for PEV Gamma Rays with the Kascade Experiment

Details Search for PEV Gamma Rays with the Kascade Experiment Search for PEV Gamma Rays with the Kascade Experiment

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....6.2370f&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

Scientific paper

Data observed with the KASCADE extensive air shower experiment have been analyzed with respect to a possible contribution by primary gamma rays in the energy range of 0.3 to 10 PeV. The study makes use of the good definition of electron and muon numbers by the experiment. Possible gamma induced events are mainly identified by their low muon to electron ratios but, in addition, the steepness and smoothness of the electron lateral distributions are exploited. No positive identifications can be claimed but our results confirm and, in the lower part of the energy range, improve upper limits of a possible gamma contribution made by previous experiments. The distribution on the sky of the 53 most 'gamma-like' events out of a sample of 13.6 million events is indistinguishable from that of all the events registered. The results are based on a measurement time of approximately half a year.

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