arxiv: 1303.0979 · v2 · pith:I4LIWG2Lnew · submitted 2013-03-05 · 🌌 astro-ph.HE

Discovery of the VHE gamma-ray source HESS J1641-463

I. Oya , M. Dalton , B. Behera , P. Bordas , A. Djannati-Ata\"i , J. Hahn , V. Marandon , U. Schwanke

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G. Spengler H.E.S.S. collaboration

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classification 🌌 astro-ph.HE

keywords hessj1641-463sourcebeenfluxlevelobservationsarchival

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A new TeV source, HESS J1641-463, has been serendipitously discovered in the Galactic plane by the High Energy Stereoscopic System (H.E.S.S.) at a significance level of 8.6 standard deviations. The observations of HESS J1641-463 were performed between 2004 and 2011 and the source has a moderate flux level of 1.7% of the Crab Nebula flux at E > 1 TeV. HESS J1641-463 has a rather hard photon index of 1.99 +- 0.13_stat +- 0.20_sys. HESS J1641-463 is positionally coincident with the radio supernova remnant SNR G338.5+0.1, but no clear X-ray counterpart has been found in archival Chandra observations of the region. Different possible VHE production scenarios will be discussed in this contribution.

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Discovery of the VHE gamma-ray source HESS J1641-463

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