Energy Spectrum of TeV Gamma-Rays from Crab Nebula

Details Energy Spectrum of TeV Gamma-Rays from Crab Nebula Energy Spectrum of TeV Gamma-Rays from Crab Nebula

1999-01-08

arxiv.org/abs/astro-ph/9901094v1

Astronomy and Astrophysics

Astrophysics

contribution to "Rayos cosmicos 98: Proceeding of the 16th European Cosmic Ray Symposium" Ed. J. Medina. Universidad de Alcala

Scientific paper

The Crab Nebula has been observed by the HEGRA stereoscopic system of 4 imaging air Cherenkov telescopes (IACTs) for about 100 hours from 1997 September to 1998 March. The recent detailed studies on the system performance give an energy threshold and an energy resolution for gamma-rays of 500 GeV and \~20 %, respectively. The Crab spectrum was measured with the IACTs system in a very broad energy range from 500 GeV to 25 TeV, using the observations at zenith angles up to 50 degree. The pure power-law spectrum in TeV gamma-rays constrains the physics parameters of the nebula environment as well as the models of photon emission.

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