Observations of the shell-type supernova remnant cassiopeia a at tev energies with veritas
Acciari, V. A. Aliu, E. Arlen, T. Aune, T. Bautista, M. Beilicke, M. Benbow, W. Boltuch, D. Bradbury, S. M. Buckley, J. H.
Acciari, V. A.
Aliu, E.
Arlen, T.
Aune, T.
Bautista, M.
Beilicke, M.
Benbow, W.
Boltuch, D.
Bradbury, S. M.
Buckley, J. H.
Repository DOI
Publication Date
2010-04-08
Keywords
acceleration of particles, cosmic rays, gamma rays: ism, ism: individual objects (cassiopeia a), ism: supernova remnants, air cerenkov telescopes, gamma-ray emission, crab-nebula, a supernova, magnetic-fields, particle-acceleration, electron acceleration, rx j1713.7-3946, magic telescope, cosmic-rays
Type
Article
Downloads
Citation
Acciari, V. A. Aliu, E.; Arlen, T.; Aune, T.; Bautista, M.; Beilicke, M.; Benbow, W.; Boltuch, D.; Bradbury, S. M.; Buckley, J. H.; Bugaev, V.; Butt, Y.; Byrum, K.; Cannon, A.; Cesarini, A.; Chow, Y. C.; Ciupik, L.; Cogan, P.; Cui, W.; Dickherber, R.; Duke, C.; Ergin, T.; Fegan, S. J.; Finley, J. P.; Finnegan, G.; Fortin, P.; Fortson, L.; Furniss, A.; Galante, N.; Gall, D.; Gillanders, G. H.; Grube, J.; Guenette, R.; Gyuk, G.; Hanna, D.; Holder, J.; Huang, D.; Hui, C. M.; Humensky, T. B.; Kaaret, P.; Karlsson, N.; Kertzman, M.; Kieda, D.; Konopelko, A.; Krawczynski, H.; Krennrich, F.; Lang, M. J.; LeBohec, S.; Maier, G.; McArthur, S.; McCann, A.; McCutcheon, M.; Millis, J.; Moriarty, P.; Ong, R. A.; Pandel, D.; Perkins, J. S.; Pohl, M.; Quinn, J.; Ragan, K.; Reynolds, P. T.; Roache, E.; Rose, H. J.; Schroedter, M.; Sembroski, G. H.; Smith, A. W.; Smith, B. R.; Steele, D.; Swordy, S. P.; Theiling, M.; Thibadeau, S.; Varlotta, A.; Vassiliev, V. V.; Vincent, S.; Wagner, R. G.; Wakely, S. P.; Ward, J. E.; Weekes, T. C.; Weinstein, A.; Weisgarber, T.; Wissel, S.; Wood, M. (2010). Observations of the shell-type supernova remnant cassiopeia a at tev energies with veritas. The Astrophysical Journal 714 (1), 163-169
Abstract
We report on observations of very high energy gamma rays from the shell-type supernova remnant (SNR) Cassiopeia A with the Very Energetic Radiation Imaging Telescope Array System stereoscopic array of four imaging atmospheric Cherenkov telescopes in Arizona. The total exposure time for these observations is 22 hr, 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 sigma. 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 proportional to 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.
Funder
Publisher
IOP Publishing
Publisher DOI
10.1088/0004-637x/714/1/163
Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland