The Giant Radio Galaxy M 87 as a TeV g-Ray Emitter Observed with the HEGRA Cherenkov Telescopes

Details The Giant Radio Galaxy M 87 as a TeV g-Ray Emitter Observed with the HEGRA Cherenkov Telescopes The Giant Radio Galaxy M 87 as a TeV g-Ray Emitter Observed with the HEGRA Cherenkov Telescopes

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....5.2623g&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

For the first time an excess of photons above an energy threshold of 730 GeV from the giant radio galaxy M 87 has been measured with a significance of 4.1 σ . The data have been taken during the years 1998 and 1999 with the HEGRA stereoscopic system of 5 imaging atmospheric Cherenkov telescopes. The excess corresp onds to an integral flux of 3.3 % of the Crab flux. Making use of the imaging atmospheric Cherenkov technique, this is the first object of the AGN class observed in this energy range not belonging to the BL Lac type objects.

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