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dc.contributor.authorAliu, E.
dc.contributor.authorArlen, T.
dc.contributor.authorAune, T.
dc.contributor.authorBeilicke, M.
dc.contributor.authorBenbow, W.
dc.contributor.authorBouvier, A.
dc.contributor.authorBradbury, S. M.
dc.contributor.authorBuckley, J. H.
dc.contributor.authorBugaev, V.
dc.contributor.authorByrum, K.
dc.contributor.authorCannon, A.
dc.contributor.authorCesarini, A.
dc.contributor.authorCiupik, L.
dc.contributor.authorCollins-Hughes, E.
dc.contributor.authorConnolly, M. P.
dc.contributor.authorCui, W.
dc.contributor.authorDickherber, R.
dc.contributor.authorDuke, C.
dc.contributor.authorErrando, M.
dc.contributor.authorFalcone, A.
dc.contributor.authorFinley, J. P.
dc.contributor.authorFinnegan, G.
dc.contributor.authorFortson, L.
dc.contributor.authorFurniss, A.
dc.contributor.authorGalante, N.
dc.contributor.authorGall, D.
dc.contributor.authorGodambe, S.
dc.contributor.authorGriffin, S.
dc.contributor.authorGrube, J.
dc.contributor.authorGuenette, R.
dc.contributor.authorGyuk, G.
dc.contributor.authorHanna, D.
dc.contributor.authorHolder, J.
dc.contributor.authorHuan, H.
dc.contributor.authorHughes, G.
dc.contributor.authorHui, C. M.
dc.contributor.authorHumensky, T. B.
dc.contributor.authorImran, A.
dc.contributor.authorKaaret, P.
dc.contributor.authorKarlsson, N.
dc.contributor.authorKertzman, M.
dc.contributor.authorKieda, D.
dc.contributor.authorKrawczynski, H.
dc.contributor.authorKrennrich, F.
dc.contributor.authorLang, M. J.
dc.contributor.authorLeBohec, S.
dc.contributor.authorMadhavan, A. S
dc.contributor.authorMaier, G.
dc.contributor.authorMajumdar, P.
dc.contributor.authorMcArthur, S.
dc.contributor.authorMcCann, A.
dc.contributor.authorMoriarty, P.
dc.contributor.authorMukherjee, R.
dc.contributor.authorNuñez, P. D.
dc.contributor.authorOng, R. A.
dc.contributor.authorOrr, M.
dc.contributor.authorOtte, A. N.
dc.contributor.authorPark, N.
dc.contributor.authorPerkins, J. S.
dc.contributor.authorPichel, A.
dc.contributor.authorPohl, M.
dc.contributor.authorProkoph, H.
dc.contributor.authorQuinn, J.
dc.contributor.authorRagan, K.
dc.contributor.authorReyes, L. C.
dc.contributor.authorReynolds, P. T.
dc.contributor.authorRoache, E.
dc.contributor.authorRose, H. J.
dc.contributor.authorRuppel, J.
dc.contributor.authorSaxon, D. B.
dc.contributor.authorSchroedter, M.
dc.contributor.authorSembroski, G. H.
dc.contributor.authorŞentürk, G. D.
dc.contributor.authorSkole, C.
dc.contributor.authorStaszak, D.
dc.contributor.authorTešić, G.
dc.contributor.authorTheiling, M.
dc.contributor.authorThibadeau, S.
dc.contributor.authorTsurusaki, K.
dc.contributor.authorTyler, J.
dc.contributor.authorVarlotta, A.
dc.contributor.authorVassiliev, V. V.
dc.contributor.authorVincent, S.
dc.contributor.authorVivier, M.
dc.contributor.authorWakely, S. P.
dc.contributor.authorWard, J. E.
dc.contributor.authorWeekes, T. C.
dc.contributor.authorWeinstein, A.
dc.contributor.authorWeisgarber, T.
dc.contributor.authorWilliams, D. A.
dc.contributor.authorZitzer, B.
dc.date.accessioned2018-09-20T15:59:34Z
dc.date.available2018-09-20T15:59:34Z
dc.date.issued2012-02-01
dc.identifier.citationAliu, E. Arlen, T.; Aune, T.; Beilicke, M.; Benbow, W.; Bouvier, A.; Bradbury, S. M.; Buckley, J. H.; Bugaev, V.; Byrum, K.; Cannon, A.; Cesarini, A.; Ciupik, L.; Collins-Hughes, E.; Connolly, M. P.; Cui, W.; Dickherber, R.; Duke, C.; Errando, M.; Falcone, A.; Finley, J. P.; Finnegan, G.; Fortson, L.; Furniss, A.; Galante, N.; Gall, D.; Godambe, S.; Griffin, S.; Grube, J.; Guenette, R.; Gyuk, G.; Hanna, D.; Holder, J.; Huan, H.; Hughes, G.; Hui, C. M.; Humensky, T. B.; Imran, A.; Kaaret, P.; Karlsson, N.; Kertzman, M.; Kieda, D.; Krawczynski, H.; Krennrich, F.; Lang, M. J.; LeBohec, S.; Madhavan, A. S; Maier, G.; Majumdar, P.; McArthur, S.; McCann, A.; Moriarty, P.; Mukherjee, R.; Nuñez, P. D.; Ong, R. A.; Orr, M.; Otte, A. N.; Park, N.; Perkins, J. S.; Pichel, A.; Pohl, M.; Prokoph, H.; Quinn, J.; Ragan, K.; Reyes, L. C.; Reynolds, P. T.; Roache, E.; Rose, H. J.; Ruppel, J.; Saxon, D. B.; Schroedter, M.; Sembroski, G. H.; Şentürk, G. D.; Skole, C.; Staszak, D.; Tešić, G.; Theiling, M.; Thibadeau, S.; Tsurusaki, K.; Tyler, J.; Varlotta, A.; Vassiliev, V. V.; Vincent, S.; Vivier, M.; Wakely, S. P.; Ward, J. E.; Weekes, T. C.; Weinstein, A.; Weisgarber, T.; Williams, D. A.; Zitzer, B. (2012). Veritas observations of day-scale flaring of m 87 in 2010 april. The Astrophysical Journal 746 (2),
dc.identifier.issn0004-637X,1538-4357
dc.identifier.urihttp://hdl.handle.net/10379/10214
dc.description.abstractVERITAS has been monitoring the very-high-energy (VHE; > 100 GeV) gamma-ray activity of the radio galaxy M87 since 2007. During 2008, flaring activity on a timescale of a few days was observed with a peak flux of (0.70 +/- 0.16) x 10(-11) cm(-2) s(-1) at energies above 350 GeV. In 2010 April, VERITAS detected a flare from M 87 with peak flux of (2.71 +/- 0.68) x 10(-11) cm(-2) s(-1) for E > 350 GeV. The source was observed for six consecutive nights during the flare, resulting in a total of 21 hr of good-quality data. The most rapid flux variation occurred on the trailing edge of the flare with an exponential flux decay time of 0.90(-0.15)(+0.22) days. The shortest detected exponential rise time is three times as long, at 2.87(+1.65)(-0.99) days. The quality of the data sample is such that spectral analysis can be performed for three periods: rising flux, peak flux, and falling flux. The spectra obtained are consistent with power-law forms. The spectral index at the peak of the flare is equal to 2.19 +/- 0.07. There is some indication that the spectrum is softer in the falling phase of the flare than the peak phase, with a confidence level corresponding to 3.6 standard deviations. We discuss the implications of these results for the acceleration and cooling rates of VHE electrons in M 87 and the constraints they provide on the physical size of the emitting region.
dc.publisherIOP Publishing
dc.relation.ispartofThe Astrophysical Journal
dc.subjectgalaxies: individual (m 87, ver j1230+123)
dc.subjectgamma rays: galaxies
dc.subjectgamma-ray emission
dc.subjectsupermassive black-hole
dc.subjectradio galaxy m87
dc.subjecttev emission
dc.subjectjet
dc.subjectvariability
dc.subjecttelescope
dc.subjecthst-1
dc.subjectblazar
dc.subjectagns
dc.titleVeritas observations of day-scale flaring of m 87 in 2010 april
dc.typeArticle
dc.identifier.doi10.1088/0004-637x/746/2/141
dc.local.publishedsourcehttp://iopscience.iop.org/article/10.1088/0004-637X/746/2/141/pdf
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