A search for gamma radiation above 24 TeV energy from cosmic point sources

Details A search for gamma radiation above 24 TeV energy from cosmic point sources A search for gamma radiation above 24 TeV energy from cosmic point sources

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aph.....4....1k&link_type=abstract

ASTROPARTICLE PHYSICS, Volume 4, Issue 1, p. 1-13.

Physics

27

Scientific paper

The HEGRA collaboration has searched for gamma-ray emission from 36 potential cosmic point sources with the wide angle air Cerenkov detector AIROBICC which is part of the HEGRA cosmic ray detector complex on La Palma. AIROBICC has a gamma-ray energy threshold of around 24 TeV and a mean angular resolution of 0.29 deg. None of the sources could be found. Upper limits to their fluxes are given. For the VHE gamma-ray emitters, the Crab nebula and Mrk 421, these flux limits are below those extrapolated from lower energy observations. Our lower limit for Mrk 421 might be interpreted either as being due to an energy cut-off in the acceleration mechanism or to the onset of gamma-interaction with photons of the universal infrared background.

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