Technical performance of the HEGRA IACT system

Details Technical performance of the HEGRA IACT system Technical performance of the HEGRA IACT system

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....7.2866p&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

Since the beginning of 1997, the HEGRA collaboration is running a stereoscopic system of 4 (later 5) imaging atmospheric Cherenkov telescopes on the Canary Island La Palma. In this paper we show the basic calibration schemes which were developed for the system and some results. Key features are the continuous sensitivity monitoring with an accuracy of a few percent, the absolute pointing accuracy of 25 arcsec, and an absolute energy calibration with an accuracy of 15 percent. The sensitivity monitoring has shown that the energy threshold of the system with a nominal value of 500 GeV (at low zenith angles) has not exceeded 600 GeV throughout the whole operation time.

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