Observations of the shell-type SNR Cassiopeia A at TeV energies with VERITAS

Details Observations of the shell-type SNR Cassiopeia A at TeV energies with VERITAS Observations of the shell-type SNR Cassiopeia A at TeV energies with VERITAS

2010-02-15

arxiv.org/abs/1002.2974v1

Astrophys.J.714:163-169,2010

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

27 pages, 2 figures; Accepted for publication in ApJ

Scientific paper

10.1088/0004-637X/714/1/163

We report on observations of very high-energy gamma rays from the shell-type supernova remnant Cassiopeia A with the VERITAS stereoscopic array of four imaging atmospheric Cherenkov telescopes in Arizona. The total exposure time for these observations is 22 hours, accumulated between September and November of 2007. The gamma-ray source associated with the SNR Cassiopeia A was detected above 200 GeV with a statistical significance of 8.3 s.d. The estimated integral flux for this gamma-ray source is about 3% of the Crab-Nebula flux. The photon spectrum is compatible with a power law dN/dE ~ E^(-Gamma) with an index Gamma = 2.61 +/- 0.24(stat) +/- 0.2(sys). The data are consistent with a point-like source. We provide a detailed description of the analysis results, and discuss physical mechanisms that may be responsible for the observed gamma-ray emission.

Affiliated with

Also associated with

No associations

Rating

Observations of the shell-type SNR Cassiopeia A at TeV energies with VERITAS does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Observations of the shell-type SNR Cassiopeia A at TeV energies with VERITAS, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of the shell-type SNR Cassiopeia A at TeV energies with VERITAS will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-597783