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Observation of very high energy gamma rays from HESS J1804-216 with CANGAROO-III telescopes

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dc.contributor.authorHigashi, Y.
dc.contributor.authorKubo, H.
dc.contributor.authorYoshida, T.
dc.contributor.authorEnomoto, R.
dc.contributor.authorTanimori, T.
dc.contributor.authorEdwards, P.
dc.contributor.authorNaito, T.
dc.contributor.authorBicknell, G.
dc.contributor.authorClay, R.
dc.contributor.authorGunji, S.
dc.contributor.authorHara, S.
dc.contributor.authorHara, T.
dc.contributor.authorHattori, T.
dc.contributor.authorHayashi, S.
dc.contributor.authorHirai, Y.
dc.contributor.authorInoue, K.
dc.contributor.authorKabuki, S.
dc.contributor.authorKajino, F.
dc.contributor.authorKatagiri, H.
dc.contributor.authorKawachi, A.
dc.contributor.authoret al.
dc.date.issued2008
dc.descriptionCopyright © 2008. The American Astronomical Society. All rights reserved. Printed in U.S.A.
dc.description.abstractWe observed the unidentified TeV gamma-ray source HESS J1804-216 with the CANGAROO-III atmospheric Cerenkov telescopes from 2006 May to July. We detected very high energy gamma rays above 600 GeV at the 10 σ level in an effective exposure of 76 hr. We obtained a differential flux of (5.0 ± 1.5<inf>stat</inf> ± 1.6<inf>sys</inf>) × 10<sup>-12</sup> (E/1 TeV)<sup>-α</sup> cm<sup>-2</sup> s<sup>-1</sup> TeV<sup>-1</sup> with a photon index a of 2.69 ± 0.30<inf>stat</inf> ± 0.34<inf>sys</inf>, which is consistent with that of the H.E.S.S. observation in 2004. We also confirm the extended morphology of the source. By combining our result with multiwavelength observations, we discuss the possible counterparts of HESS J1804-216 and the radiation mechanism based on leptonic and hadronic processes for a supernova remnant and a pulsar wind nebula. © 2008. The American Astronomical Society.All rights reserved.
dc.description.statementofresponsibilityY. Higashi, H. Kubo, T. Yoshida, R. Enomoto, T. Tanimori, P. G. Edwards, T. Naito, G. V. Bicknell, R. W. Clay, S. Gunji, S. Hara, T. Hara, T. Hattori, S. Hayashi, Y. Hirai, K. Inoue, S. Kabuki, F. Kajino, H. Katagiri, A. Kawachi, T. Kifune, R. Kiuchi, J. Kushida, Y. Matsubara, T. Mizukami, Y. Mizumoto, R. Mizuniwa, M. Mori, H. Muraishi, Y. Muraki, T. Nakamori, S. Nakano, D. Nishida, K. Nishijima, M. Ohishi, Y. Sakamoto, A. Seki, V. Stamatescu, T. Suzuki, D. L. Swaby, G. Thornton, F. Tokanai, K. Tsuchiya, S. Watanabe, Y. Yamada, E. Yamazaki, S. Yanagita, . Yoshikoshi and Y. Yukawa
dc.identifier.citationThe Astrophysical Journal: an international review of astronomy and astronomical physics, 2008; 683(2):957-966
dc.identifier.doi10.1086/589877
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.orcidClay, R. [0000-0002-9040-9648]
dc.identifier.urihttp://hdl.handle.net/2440/47638
dc.language.isoen
dc.publisherUniv Chicago Press
dc.relation.grantARC
dc.source.urihttps://doi.org/10.1086/589877
dc.titleObservation of very high energy gamma rays from HESS J1804-216 with CANGAROO-III telescopes
dc.typeJournal article
pubs.publication-statusPublished

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