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Multiwavelength observations of a TeV-Flare from W Comae

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arxiv 0910.3750 v1 pith:CDL3CAY4 submitted 2009-10-20 astro-ph.HE

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

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  1. Blazars Jets and prospects for TeV-PeV neutrinos & gamma-rays through cosmic-ray interactions

    astro-ph.HE 2025-01 conditional novelty 4.0 of 10

    A single-zone model with added proton-proton collisions suggests W Comae and 1ES 1959+650 need hadronic emission, and CTAO sensitivity forecasts show all four BL Lacs are detectable.

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