Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS
dc.contributor.author | Lang, Mark | en |
dc.contributor.author | Gillanders, Gary | en |
dc.date.accessioned | 2011-03-10T16:54:05Z | en |
dc.date.available | 2011-03-10T16:54:05Z | en |
dc.date.issued | 2008 | en |
dc.identifier.citation | V.A. Acciari, M. Beilicke, G. Blaylock, S.M. Bradbury, J.H. Buckley, V. Bugaev...(2008)Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS, Acciari V.A. et al., The Astrophysical Journal 679: 397-403 (2008 May 20) | en |
dc.identifier.uri | http://hdl.handle.net/10379/1721 | en |
dc.description.abstract | The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to study in detail processes occurring in Active Galactic Nuclei from radio waves to TeV gamma-rays. Here we report the detection of gamma-ray emission above 250 GeV from M87 in spring 2007 with the VERITAS atmospheric Cherenkov telescope array and discuss its correlation with the X-ray emission. The gamma-ray emission is measured to be point-like with an intrinsic source radius less than 4.5 arcmin. The differential energy spectrum is fitted well by a power-law function: dPhi/dE=(7.4+-1.3_{stat}+-1.5_{sys})(E/TeV)^{-2.31+-0.17_{stat}+-0.2_{sys}} 10^{-9}m^{-2}s^{-1}TeV^{-1}. We show strong evidence for a year-scale correlation between the gamma-ray flux reported by TeV experiments and the X-ray emission measured by the ASM/RXTE observatory, and discuss the possible short-time-scale variability. These results imply that the gamma-ray emission from M87 is more likely associated with the core of the galaxy than with other bright X-ray features in the jet. | en |
dc.format | application/pdf | en |
dc.language.iso | en | en |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Ireland | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ | |
dc.subject | Astrophysics | en |
dc.title | Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS | en |
dc.type | Article | en |
dc.local.publishedsource | http://arxiv.org/pdf/0802.1951 | en |
dc.description.peer-reviewed | peer-reviewed | en |
dc.local.authors | V.A. Acciari, M. Beilicke, G. Blaylock, S.M. Bradbury, J.H. Buckley, V. Bugaev, Y. Butt, O. Celik, A. Cesarini, L. Ciupik, P. Cogan, P. Colin, W. Cui, M.K. Daniel, C. Duke, T. Ergin, A.D. Falcone, S.J. Fegan, J.P. Finley, G. Finnegan, P. Fortin, L.F. Fortson, K. Gibbs, G.H. Gillanders, J. Grube, R. Guenette, G. Gyuk, D. Hanna, E. Hays, J. Holder, D. Horan, S.B. Hughes, M.C. Hui, T.B. Humensky, A. Imran, P. Kaaret, M. Kertzman, D.B. Kieda, J. Kildea, A. Konopelko, H. Krawczynski, F. Krennrich, M.J. Lang, S. LeBohec, K. Lee, G. Maier, A. McCann, M. McCutcheon, J. Millis, P. Moriarty, R. Mukherjee, T. Nagai, R.A. Ong, D. Pandel, J.S. Perkins, M. Pohl, J. Quinn, K. Ragan, P.T. Reynolds, H.J. Rose, M. Schroedter, G.H. Sembroski, A.W. Smith, D. Steele, S.P. Swordy, A. Syson J.A. Toner, L. Valcarcel, V.V. Vassiliev, S.P. Wakely, J.E. Ward, T.C. Weekes, A. Weinstein, R.J. White, D.A. Williams, S.A. Wissel, M.D. Wood, B. Zitzer | en |
dc.local.arxivid | 0802.1951 | en |
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