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Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/50834
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dc.contributor.authorSakamoto, Y.-
dc.contributor.authorNishijima, K.-
dc.contributor.authorMizukami, T.-
dc.contributor.authorYamazaki, E.-
dc.contributor.authorKushida, J.-
dc.contributor.authorEnomoto, R.-
dc.contributor.authorOhishi, M.-
dc.contributor.authorBicknell, G.-
dc.contributor.authorClay, R.-
dc.contributor.authorEdwards, P.-
dc.contributor.authorGunji, S.-
dc.contributor.authorHara, S.-
dc.contributor.authorHattori, T.-
dc.contributor.authorHayashi, S.-
dc.contributor.authorHigashi, Y.-
dc.contributor.authorHirai, Y.-
dc.contributor.authorInoue, K.-
dc.contributor.authorItoh, C.-
dc.contributor.authorKabuki, S.-
dc.contributor.authorKajino, F.-
dc.contributor.authoret al.-
dc.date.issued2008-
dc.identifier.citationThe Astrophysical Journal: an international review of astronomy and astronomical physics, 2008; 676(1):113-120-
dc.identifier.issn0004-637X-
dc.identifier.issn1538-4357-
dc.identifier.urihttp://hdl.handle.net/2440/50834-
dc.descriptionCopyright © 2008. The American Astronomical Society. All rights reserved. Printed in U.S.A.-
dc.description.abstractWe have used the CANGAROO-III imaging atmospheric Cerenkov telescopes to observe the high-frequency-peaked BL Lacertae (HBL) object PKS 2155-304 between 2006 July 28 (MJD 53,944) and August 2, triggered by the H.E.S.S. report that the source was in a high state of TeV gamma-ray emission. A signal was detected at the 4.8 σ level in an effective live time of 25.1 hr during the outburst period. The flux of very high energy gamma rays from the CANGAROO-III observations shows variability on the timescale of less than a few hours. The averaged integral flux above 660 GeV is (1.6 ± 0.3stat ± 0.5syst) × 10-11 cm-2 s -1, which corresponds to ∼45% of the flux observed from the Crab Nebula. Follow-up observations between August 17 (MJD 53,964) and 25 indicate that the source activity had decreased. © 2008. The American Astronomical Society. All rights reserved.-
dc.description.statementofresponsibilityY. Sakamoto, K. Nishijima, T. Mizukami, E. Yamazaki, J. Kushida, R. Enomoto, M. Ohishi, G. V. Bicknell, R. W. Clay, P. G. Edwards, S. Gunji, S. Hara, T. Hattori, S. Hayashi, Y. Higashi, Y. Hirai, K. Inoue, C. Itoh, S. Kabuki, F. Kajino, H. Katagiri, A. Kawachi, T. Kifune, R. Kiuchi, H. Kubo, R. Mizuniwa, M. Mori, H. Muraishi, T. Naito, T. Nakamori, S. Nakano, D. Nishida, A. Seki, V. Stamatescu, T. Suzuki, D. L. Swaby, T. Tanimori, G. Thornton, F. Tokanai, K. Tsuchiya, S. Watanabe, Y. Yamada, S. Yanagita, T. Yoshida, T. Yoshikoshi, and Y. Yukawa-
dc.language.isoen-
dc.publisherUniv Chicago Press-
dc.source.urihttp://dx.doi.org/10.1086/528369-
dc.subjectBL Lacertae objects: individual (PKS 2155–304)-
dc.subjectgalaxies: active-
dc.subjectgamma rays: observations-
dc.titleCangaroo-III observations of the 2006 outburst of PKS 2155-304-
dc.typeJournal article-
dc.provenanceThe Astrophysical Journal (0004-637X) was published by the University of Chicago Press previous to 2009.-
dc.identifier.doi10.1086/528369-
pubs.publication-statusPublished-
dc.identifier.orcidClay, R. [0000-0002-9040-9648]-
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Chemistry and Physics publications

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