Veritas observations of day-scale flaring of m 87 in 2010 april
dc.contributor.author | Aliu, E. | |
dc.contributor.author | Arlen, T. | |
dc.contributor.author | Aune, T. | |
dc.contributor.author | Beilicke, M. | |
dc.contributor.author | Benbow, W. | |
dc.contributor.author | Bouvier, A. | |
dc.contributor.author | Bradbury, S. M. | |
dc.contributor.author | Buckley, J. H. | |
dc.contributor.author | Bugaev, V. | |
dc.contributor.author | Byrum, K. | |
dc.contributor.author | Cannon, A. | |
dc.contributor.author | Cesarini, A. | |
dc.contributor.author | Ciupik, L. | |
dc.contributor.author | Collins-Hughes, E. | |
dc.contributor.author | Connolly, M. P. | |
dc.contributor.author | Cui, W. | |
dc.contributor.author | Dickherber, R. | |
dc.contributor.author | Duke, C. | |
dc.contributor.author | Errando, M. | |
dc.contributor.author | Falcone, A. | |
dc.contributor.author | Finley, J. P. | |
dc.contributor.author | Finnegan, G. | |
dc.contributor.author | Fortson, L. | |
dc.contributor.author | Furniss, A. | |
dc.contributor.author | Galante, N. | |
dc.contributor.author | Gall, D. | |
dc.contributor.author | Godambe, S. | |
dc.contributor.author | Griffin, S. | |
dc.contributor.author | Grube, J. | |
dc.contributor.author | Guenette, R. | |
dc.contributor.author | Gyuk, G. | |
dc.contributor.author | Hanna, D. | |
dc.contributor.author | Holder, J. | |
dc.contributor.author | Huan, H. | |
dc.contributor.author | Hughes, G. | |
dc.contributor.author | Hui, C. M. | |
dc.contributor.author | Humensky, T. B. | |
dc.contributor.author | Imran, A. | |
dc.contributor.author | Kaaret, P. | |
dc.contributor.author | Karlsson, N. | |
dc.contributor.author | Kertzman, M. | |
dc.contributor.author | Kieda, D. | |
dc.contributor.author | Krawczynski, H. | |
dc.contributor.author | Krennrich, F. | |
dc.contributor.author | Lang, M. J. | |
dc.contributor.author | LeBohec, S. | |
dc.contributor.author | Madhavan, A. S | |
dc.contributor.author | Maier, G. | |
dc.contributor.author | Majumdar, P. | |
dc.contributor.author | McArthur, S. | |
dc.contributor.author | McCann, A. | |
dc.contributor.author | Moriarty, P. | |
dc.contributor.author | Mukherjee, R. | |
dc.contributor.author | Nuñez, P. D. | |
dc.contributor.author | Ong, R. A. | |
dc.contributor.author | Orr, M. | |
dc.contributor.author | Otte, A. N. | |
dc.contributor.author | Park, N. | |
dc.contributor.author | Perkins, J. S. | |
dc.contributor.author | Pichel, A. | |
dc.contributor.author | Pohl, M. | |
dc.contributor.author | Prokoph, H. | |
dc.contributor.author | Quinn, J. | |
dc.contributor.author | Ragan, K. | |
dc.contributor.author | Reyes, L. C. | |
dc.contributor.author | Reynolds, P. T. | |
dc.contributor.author | Roache, E. | |
dc.contributor.author | Rose, H. J. | |
dc.contributor.author | Ruppel, J. | |
dc.contributor.author | Saxon, D. B. | |
dc.contributor.author | Schroedter, M. | |
dc.contributor.author | Sembroski, G. H. | |
dc.contributor.author | Şentürk, G. D. | |
dc.contributor.author | Skole, C. | |
dc.contributor.author | Staszak, D. | |
dc.contributor.author | Tešić, G. | |
dc.contributor.author | Theiling, M. | |
dc.contributor.author | Thibadeau, S. | |
dc.contributor.author | Tsurusaki, K. | |
dc.contributor.author | Tyler, J. | |
dc.contributor.author | Varlotta, A. | |
dc.contributor.author | Vassiliev, V. V. | |
dc.contributor.author | Vincent, S. | |
dc.contributor.author | Vivier, M. | |
dc.contributor.author | Wakely, S. P. | |
dc.contributor.author | Ward, J. E. | |
dc.contributor.author | Weekes, T. C. | |
dc.contributor.author | Weinstein, A. | |
dc.contributor.author | Weisgarber, T. | |
dc.contributor.author | Williams, D. A. | |
dc.contributor.author | Zitzer, B. | |
dc.date.accessioned | 2018-09-20T15:59:34Z | |
dc.date.available | 2018-09-20T15:59:34Z | |
dc.date.issued | 2012-02-01 | |
dc.identifier.citation | Aliu, 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.issn | 0004-637X,1538-4357 | |
dc.identifier.uri | http://hdl.handle.net/10379/10214 | |
dc.description.abstract | VERITAS 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.publisher | IOP Publishing | |
dc.relation.ispartof | The Astrophysical Journal | |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Ireland | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ | |
dc.subject | galaxies: individual (m 87, ver j1230+123) | |
dc.subject | gamma rays: galaxies | |
dc.subject | gamma-ray emission | |
dc.subject | supermassive black-hole | |
dc.subject | radio galaxy m87 | |
dc.subject | tev emission | |
dc.subject | jet | |
dc.subject | variability | |
dc.subject | telescope | |
dc.subject | hst-1 | |
dc.subject | blazar | |
dc.subject | agns | |
dc.title | Veritas observations of day-scale flaring of m 87 in 2010 april | |
dc.type | Article | |
dc.identifier.doi | 10.1088/0004-637x/746/2/141 | |
dc.local.publishedsource | http://iopscience.iop.org/article/10.1088/0004-637X/746/2/141/pdf | |
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