Multiwavelength observations of a TeV-Flare from W Comae
Creators: name: VERITAS Collaboration
name: Acciari, V. A.
name: Aliu, E.
name: Aune, T.
name: Beilicke, M.
name: Benbow, W.
name: Bottcher, M.
name: Boltuch, D.
name: Buckley, J. H.
name: Bradbury, S. M.
name: Bugaev, V.
name: Byrum, K.
name: Cannon, A.
name: Cesarini, A.
name: Ciupik, L.
name: Cogan, P.
name: Cui, W.
name: Dickherber, R.
name: Duke, C.
name: Falcone, A.
name: Finley, J. P.
name: Fortin, P.
name: Fortson, L.
name: Furniss, A.
name: Galante, N.
name: Gall, D.
name: Gibbs, K.
name: Gillanders, G. H.
name: Grube, J.
name: Guenette, R.
name: Gyuk, G.
name: Hanna, D.
name: Holder, J.
name: Hui, C. M.
name: Humensky, T. B.
name: Kaaret, P.
name: Karlsson, N.
name: Kertzman, M.
name: Kieda, D.
name: Konopelko, A.
name: Krawczynski, H.
name: Krennrich, F.
name: Lang, M. J.
name: LeBohec, S.
name: Maier, G.
name: McArthur, S.
name: McCann, A.
name: McCutcheon, M.
name: Millis, J.
name: Moriarty, P.
name: Ong, R. A.
name: Otte, A. N.
name: Pandel, D.
name: Perkins, J. S.
name: Pichel, A.
name: Pohl, M.
name: Quinn, J.
name: Ragan, K.
name: Reyes, L. C.
name: Reynolds, P. T.
name: Roache, E.
name: Rose, H. J.
name: Sembroski, G. H.
name: Smith, A. W.
name: Steele, D.
name: Theiling, M.
name: Thibadeau, S.
name: Varlotta, A.
name: Vassiliev, V. V.
name: Vincent, S.
name: Wakely, S. P.
name: Ward, J. E.
name: Weekes, T. C.
name: Weinstein, A.
name: Weisgarber, T.
name: Williams, D. A.
name: Wissel, S.
name: Wood, M.
name: Team, The AGILE
name: :
name: Pian, E.
name: Vercellone, S.
name: Donnarumma, I.
name: D'Ammando, F.
name: Bulgarelli, A.
name: Chen, A. W.
name: Giuliani, A.
name: Longo, F.
name: Pacciani, L.
name: Pucella, G.
name: Vittorini, V.
name: Tavani, M.
name: Argan, A.
name: Barbiellini, G.
name: Caraveo, P.
name: Cattaneo, P. W.
name: Cocco, V.
name: Costa, E.
name: Del Monte, E.
name: De Paris, G.
name: Di Cocco, G.
name: Evangelista, Y.
name: Feroci, M.
name: Fiorini, M.
name: Froysland, T.
name: Frutti, M.
name: Fuschino, F.
name: Galli, M.
name: Gianotti, F.
name: Labanti, C.
name: Lapshov, I.
name: Lazzarotto, F.
name: Lipari, P.
name: Marisaldi, M.
name: Mastropietro, M.
name: Mereghetti, S.
name: Morelli, E.
name: Morselli, A.
name: Pellizzoni, A.
name: Perotti, F.
name: Piano, G.
name: Picozza, P.
name: Pilia, M.
name: Porrovecchio, G.
name: Prest, M.
name: Rapisarda, M.
name: Rappoldi, A.
name: Rubini, A.
name: Soffitta, S. Sabatini P.
name: Trifoglio, M.
name: Trois, A.
name: Vallazza, E.
name: Zambra, A.
name: Zanello, D.
name: Pittori, C.
name: Santolamazza, P.
name: Verrecchia, F.
name: Giommi, P.
name: Colafrancesco, S.
name: Salotti, L.
name: Villata, M.
name: Raiteri, C. M.
name: Aller, H. D.
name: Aller, M. F.
name: Arkharov, A. A.
name: Efimova, N. V.
name: Larionov, V. M.
name: Leto, P.
name: Ligustri, R.
name: Lindfors, E.
name: Pasanen, M.
name: Kurtanidze, O. M.
name: Tetradze, S. D.
name: Lahteenmaki, A.
name: Kotiranta, M.
name: Cucchiara, A.
name: Romano, P.
name: Nesci, R.
name: Pursimo, T.
name: Heidt, J.
name: Benitez, E.
name: Hiriart, D.
name: Nilsson, K.
name: Berdyugin, A.
name: Mujica, R.
name: Dultzin, D.
name: Lopez, J. M.
name: Mommert, M.
name: Sorcia, M.
name: Perez, I. de la Calle
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report results from an intensive multiwavelength campaign on the intermediate-frequency-peaked BL Lacertae object W Com (z=0.102) during a strong outburst of very high energy gamma-ray emission in June 2008. The very high energy gamma-ray signal was detected by VERITAS on 2008 June 7-8 with a flux F(&gt;200 GeV) = (5.7+-0.6)x10^-11 cm-2s-1, about three times brighter than during the discovery of gamma-ray emission from W Com by VERITAS in 2008 March. The initial detection of this flare by VERITAS at energies above 200 GeV was followed by observations in high energy gamma-rays (AGILE, E&gt;100 MeV), and X-rays (Swift and XMM-Newton), and at UV, and ground-based optical and radio monitoring through the GASP-WEBT consortium and other observatories. Here we describe the multiwavelength data and derive the spectral energy distribution (SED) of the source from contemporaneous data taken throughout the flare.
description: 26 pages, 5 figures; Accepted for publication by The Astrophysical Journal