Observation of the Crab Nebula with the HEGRA system of IACTs using an advanced topological trigger mode

Details Observation of the Crab Nebula with the HEGRA system of IACTs using an advanced topological trigger mode Observation of the Crab Nebula with the HEGRA system of IACTs using an advanced topological trigger mode

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....6.2407l&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

The HEGRA system of 5 imaging atmospheric ˇCerenkov telescopes (IACT) has an energy threshold of about 500 GeV in observations of γ-rays at zenith. We have made observations of the Crab Nebula for a total time of about 15 hrs using the topological trigger which allows to reduce noticeably the energy threshold of the system. The expected detection rates of cosmic rays and γ-rays, as well as the corresponding energy thresholds, were calculated using the Monte Carlo simulations. The test runs with the HEGRA IACT system have been done in order to establish the minimum threshold for the topological trigger. The final results of the data analysis will be presented at the conference.

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