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A search for very high energy γ-ray emission from the starburst galaxy NGC253 with HESS

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dc.contributor.authorAharonian, F.
dc.contributor.authorAkhperjanian, A.
dc.contributor.authorBazer-Bachi, A.
dc.contributor.authorBeilicke, M.
dc.contributor.authorBenbow, W.
dc.contributor.authorBerge, D.
dc.contributor.authorBernlohr, K.
dc.contributor.authorBoisson, C.
dc.contributor.authorBolz, O.
dc.contributor.authorBorrel, V.
dc.contributor.authorBraun, I.
dc.contributor.authorBreitling, F.
dc.contributor.authorBrown, A.
dc.contributor.authorChadwick, P.
dc.contributor.authorChounet, L.
dc.contributor.authorCornils, R.
dc.contributor.authorCostamante, L.
dc.contributor.authorDegrange, B.
dc.contributor.authorDickinson, H.
dc.contributor.authorDjannati-Atai, A.
dc.contributor.authoret al.
dc.date.issued2005
dc.description.abstractWe present the result of 28 h of observations of the nearby starburst galaxy NGC 253 with the HESS detector in 2003. We find no evidence for very high energy y-ray emission from this object. Gamma-ray emission above 400 GeV from NGC 253 had been reported by the CANGAROO collaboration in 2002. From the HESS data we derive upper limits on the flux above 300 GeV of 1.9 × 10 <sup>-12</sup> photons cm<sup>-2</sup> s<sup>-1</sup> for a point-like source and 6.3 × 10<sup>-12</sup> photons cm<sup>-2</sup> s<sup>-1</sup> for a source of radius 0.5° as reported by CANGAROO, both at a confidence level of 99%. These upper limits are inconsistent with the spectrum reported by CANGAROO. The expected very high energy γ-ray emission from this object is discussed in the framework of a galactic wind propagation model. © ESO 2005.
dc.description.statementofresponsibilityF. Aharonian...G. Rowell...and S. J. Wagner [et.al]
dc.identifier.citationAstronomy and Astrophysics (A & A), 2005; 442(1):177-183
dc.identifier.doi10.1051/0004-6361:20053521
dc.identifier.issn0004-6361
dc.identifier.issn1432-0746
dc.identifier.orcidRowell, G. [0000-0002-9516-1581]
dc.identifier.urihttp://hdl.handle.net/2440/37498
dc.language.isoen
dc.publisherE D P Sciences
dc.rights© The European Southern Observatory 2005
dc.source.urihttps://doi.org/10.1051/0004-6361:20053521
dc.titleA search for very high energy γ-ray emission from the starburst galaxy NGC253 with HESS
dc.title.alternativeA search for very high energy gamma-ray emission from the starburst galaxy NGC253 with HESS
dc.typeJournal article
pubs.publication-statusPublished

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