Peer-Reviewed Journal Details
Mandatory Fields
Acciari, VA;Beilicke, M;Blaylock, G;Bradbury, SM;Buckley, JH;Bugaev, V;Butt, Y;Celik, O;Cesarini, A;Ciupik, L;Cogan, P;Colin, P;Cui, W;Daniel, MK;Duke, C;Ergin, T;Falcone, AD;Fegan, SJ;Finley, JP;Finnegan, G;Fortin, P;Fortson, LF;Gibbs, K;Gillanders, GH;Grube, J;Guenette, R;Gyuk, G;Hanna, D;Hays, E;Holder, J;Horan, D;Hughes, SB;Hui, MC;Humensky, TB;Imran, A;Kaaret, P;Kertzman, M;Kieda, DB;Kildea, J;Konopelko, A;Krawczynski, H;Krennrich, F;Lang, MJ;LeBohec, S;Lee, K;Maier, G;McCann, A;McCutcheon, M;Millis, J;Moriarty, P;Mukherjee, R;Nagai, T;Ong, RA;Pandel, D;Perkins, JS;Pohl, M;Quinn, J;Ragan, K;Reynolds, PT;Rose, HJ;Schroedter, M;Sembroski, GH;Smith, AW;Steele, D;Swordy, SP;Syson, A;Toner, JA;Valcarcel, L;Vassiliev, VV;Wakely, SP;Ward, JE;Weekes, TC;Weinstein, A;White, RJ;Williams, DA;Wissel, SA;Wood, MD;Zitzer, B
2008
May
Astrophysical Journal
Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS
Published
WOS: 63 ()
Optional Fields
SUPERMASSIVE BLACK-HOLE X-RAY TELESCOPE OBSERVATIONS UNIFIED SCHEMES TEV EMISSION LAC OBJECTS CRAB-NEBULA JET MARKARIAN-421 VARIABILITY
679
397
403
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 Cerenkov telescope array and discuss its correlation with the X-ray emission. The gamma-ray emission is measured to be pointlike with an intrinsic source radius less than 4.5'. The differential energy spectrum is fitted well by a power-law function: d Phi/dE = (7.4 +/- 1.3(stat) +/- 1.5(sys))(E/TeV)((-2.31 +/- 0.17stat +/- 0.2sys)) 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-timescale 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.
0004-637X
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