Observation of VHE γ-rays from Cassiopeia A with the MAGIC telescope
نویسنده
چکیده
Aims. We searched for very high energy (VHE) γ-ray emission from the supernova remnant Cassiopeia A Methods. The shell-type supernova remnant Cassiopeia A was observed with the 17 meter MAGIC telescope between July 2006 and January 2007 for a total time of 47 hours. Results. The source was detected above an energy of 250 GeV with a significance of 5.2 σ and a photon flux above 1 TeV of (7.3±0.7stat±2.2sys)× 10−13cm−2 s−1. The photon spectrum is compatible with a power law dN/dE ∝E with a photon index Γ=2.3±0.2stat±0.2sys . The source is point-like within the angular resolution of the telescope.
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تاریخ انتشار 2008