Upper limits on low redshift AGN

Astronomy and Astrophysics – Astronomy

Scientific paper

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Gamma-Ray Astronomy, Gamma-Ray Sources (Astronomical), Active Galaxies, Galactic Nuclei, Quasars, Red Shift, Gamma-Ray Detection

Scientific paper

The HEGRA IACT stereoscopic system, with an energy threshold of about 0.5 TeV, was used to search for γ-ray emission of several low redshift AGN (z<0.2), mostly BL Lacs. Here we present the results of observations that were made since June 1997 at zenith angles up to 40°. No evidence for TeV emission is detected and the corresponding upper limits in Crab units are given. .

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