Evidence for TeV gamma ray emission from Cassiopeia A

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dc.contributor.authorAharonian, F.
dc.contributor.authorAkhperjanian, A.
dc.contributor.authorBarrio, J.
dc.contributor.authorBernlohr, K.
dc.contributor.authorBorst, H.
dc.contributor.authorBojahr, H.
dc.contributor.authorBolz, O.
dc.contributor.authorContreras, J.
dc.contributor.authorContina, J.
dc.contributor.authorDenninghoff, S.
dc.contributor.authorFonseca, V.
dc.contributor.authorGonzalez, J.
dc.contributor.authorGotting, N.
dc.contributor.authorHeinzelmann, G.
dc.contributor.authorHermann, G.
dc.contributor.authorHeusler, A.
dc.contributor.authorHofmann, W.
dc.contributor.authorHorns, D.
dc.contributor.authorIbarra, A.
dc.contributor.authorIserlohe, C.
dc.contributor.authoret al.
dc.date.issued2001
dc.description.abstract232 hours of data were accumulated from 1997 to 1999, using the HEGRA Stereoscopic Cherenkov Telescope System to observe the supernova remnant Cassiopeia A. TeV γ-ray emission was detected at the 5 σ level, and a flux of (5.8 ± 1.2<inf>stat</inf> ± 1.2<inf>syst</inf>) 10<sup>-9</sup> ph m<sup>-2</sup> s<sup>-1</sup> above 1 TeV was derived. The spectral distribution is consistent with a power law with a differential spectral index of -2.5 ± 0.4<inf>stat</inf> ± 0.1<inf>syst</inf> between 1 and 10TeV. As this is the first report of the detection of a TeV γ-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.
dc.description.statementofresponsibilityF. Aharonian,...G. P. Rowell,...et al.
dc.identifier.citationAstronomy and Astrophysics (A & A), 2001; 370(1):112-120
dc.identifier.doi10.1051/0004-6361:20010243
dc.identifier.issn0004-6361
dc.identifier.issn1432-0746
dc.identifier.orcidRowell, G. [0000-0002-9516-1581]
dc.identifier.urihttp://hdl.handle.net/2440/37585
dc.language.isoen
dc.publisherE D P Sciences
dc.rights© The European Southern Observatory 2001
dc.source.urihttps://doi.org/10.1051/0004-6361:20010243
dc.titleEvidence for TeV gamma ray emission from Cassiopeia A
dc.typeJournal article
pubs.publication-statusPublished

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