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  • VERITAS Discovery of >200 G...
    Acciari, V. A; Aliu, E; Beilicke, M; Benbow, W; Böttcher, M; Bradbury, S. M; Buckley, J. H; Bugaev, V; Butt, Y; Celik, O; Cesarini, A; Ciupik, L; Chow, Y. C. K; Cogan, P; Colin, P; Cui, W; Daniel, M. K; Ergin, T; Falcone, A. D; Fegan, S. J; Finley, J. P; Finnegan, G; Fortin, P; Fortson, L. F; Furniss, A; Gall, D; Gillanders, G. H; Grube, J; Guenette, R; Gyuk, G; Hanna, D; Hays, E; Holder, J; Horan, D; Hui, C. M; Humensky, T. B; Imran, A; Kaaret, P; Karlsson, N; Kertzman, M; Kieda, D. B; Konopelko, A; Krawczynski, H; Krennrich, F; Lang, M. J; LeBohec, S; Lee, K; Maier, G; McCann, A; McCutcheon, M; Moriarty, P; Mukherjee, R; Nagai, T; Niemiec, J; Ong, R. A; Pandel, D; Perkins, J. S; Petry, D; Pohl, M; Quinn, J; Ragan, K; Reyes, L. C; Reynolds, P. T; Roache, E; Rose, H. J; Schroedter, M; Sembroski, G. H; Smith, A. W; Steele, D; Swordy, S. P; Toner, J. A; Vassiliev, V. V; Wagner, R; Wakely, S. P; Ward, J. E; Weekes, T. C; Weinstein, A; White, R. J; Williams, D. A; Wissel, S. A; Wood, M; Zitzer, B

    Astrophysical journal/˜The œAstrophysical journal, 09/2008, Letnik: 684, Številka: 2
    Journal Article

    We report the detection of very high energy -ray emission from the intermediate-frequency-peaked BL Lacertae object W Comae by VERITAS. The source was observed between 2008 January and April. A strong outburst of -ray emission was measured in the middle of March, lasting for only 4 days. The energy spectrum measured during the two highest flare nights is fit by a power law and is found to be very steep, with a differential photon spectral index of image. The integral photon flux above image during those two nights corresponds to roughly image of the flux from the Crab Nebula. Quasi-simultaneous Swift observations at X-ray energies were triggered by the VERITAS observations. The spectral energy distribution of the flare data can be described by synchrotron self-Compton (SSC) or external Compton (EC) leptonic jet models.