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Evidence for TeV gamma ray emission from Cassiopeia A

232 hours of data were accumulated from 1997 to 1999, using the HEGRA Stereoscopic Cherenkov Telescope System to observe the supernova remnant Cassiopeia A. TeV <i>γ<i/>-ray emission was detected at the level, and a flux of above 1 TeV was derived. The spectral distribution is consistent...

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Main Authors: Aharonian, Felix A. (Author) , Akhperjanian, A. (Author) , Barrio, J. (Author) , Bernlöhr, Konrad (Author) , Hermann, G. (Author) , Heusler, A. (Author) , Hofmann, Werner (Author) , Kohnle, A. (Author) , Konopelko, Alexander (Author) , Kornmeyer, H. (Author) , Kranich, D. (Author) , Krawczynski, Henric (Author) , Lampeitl, Hubert (Author) , Padilla, L. (Author) , Panter, M. (Author) , Plaga, R. (Author) , Plyasheshnikov, A. V. (Author) , Prahl, J. (Author) , Pühlhofer, Gerd (Author) , Rauterberg, G. (Author) , Röhring, A. (Author) , Tluczykont, M. (Author) , Völk, Heinrich J. (Author) , Wiedner, C. A. (Author) , Wittek, W. (Author)
Format: Article (Journal)
Language:English
Published: 15 April 2001
In: Astronomy and astrophysics
Year: 2001, Volume: 370, Issue: 1, Pages: 112-120
ISSN:1432-0746
DOI:10.1051/0004-6361:20010243
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1051/0004-6361:20010243
Verlag, lizenzpflichtig, Volltext: https://www.aanda.org/articles/aa/abs/2001/16/aa10501/aa10501.html
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Author Notes:F. Aharonian, A. Akhperjanian, J. Barrio, K. Bernlöhr, H. Börst, H. Bojahr, O. Bolz, J. Contreras, J. Cortina, S. Denninghoff, V. Fonseca, J. Gonzalez, N. Götting, G. Heinzelmann, G. Hermann, A. Heusler, W. Hofmann, D. Horns, A. Ibarra, C. Iserlohe, I. Jung, R. Kankanyan, M. Kestel, J. Kettler, A. Kohnle, A. Konopelko, H. Kornmeyer, D. Kranich, H. Krawczynski, H. Lampeitl, M. Lopez, E. Lorenz, F. Lucarelli, N. Magnussen, O. Mang, H. Meyer, R. Mirzoyan, A. Moralejo, E. Ona, L. Padilla, M. Panter, R. Plaga, A. Plyasheshnikov, J. Prahl, G. Pühlhofer, G. Rauterberg, A. Röhring, W. Rhode, G.P. Rowell, V. Sahakian, M. Samorski, M. Schilling, F. Schröder, M. Siems, W. Stamm, M. Tluczykont, H.J. Völk, C.A. Wiedner, W. Wittek
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Summary:232 hours of data were accumulated from 1997 to 1999, using the HEGRA Stereoscopic Cherenkov Telescope System to observe the supernova remnant Cassiopeia A. TeV <i>γ<i/>-ray emission was detected at the level, and a flux of above 1 TeV was derived. The spectral distribution is consistent with a power law with a differential spectral index of between 1 and 10 TeV. As this is the first report of the detection of a TeV <i>γ<i/>-ray source on the "centi-Crab"scale, we present the analysis in some detail. Implications for the acceleration of cosmic rays depend on the details of the source modeling. We discuss some important aspects in this paper.
Item Description:Gesehen am 09.12.2020
Physical Description:Online Resource
ISSN:1432-0746
DOI:10.1051/0004-6361:20010243

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