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V. A. Acciari and E. Aliu and T. Aune and M. Beilicke and W. Benbow and M. Böttcher and D. Boltuch and J. H. Buckley and S. M. Bradbury and V. Bugaev and K. Byrum and A. Cannon and A. Cesarini and L. Ciupik and P. Cogan and W. Cui and R. Dickherber and C. Duke and A. Falcone and J. P. Finley and P. Fortin and L. Fortson and A. Furniss and N. Galante and D. Gall and K. Gibbs and G. H. Gillanders and J. Grube and R. Guenette and G. Gyuk and D. Hanna and J. Holder and C. M. Hui and T. B. Humensky and P. Kaaret and N. Karlsson and M. Kertzman and D. Kieda and A. Konopelko and H. Krawczynski and F. Krennrich and M. J. Lang and S. LeBohec and G. Maier and S. McArthur and A. McCann and M. McCutcheon and J. Millis and P. Moriarty and R. A. Ong and A. N. Otte and D. Pandel and J. S. Perkins and A.
Astrophysical Journal Letters
Multiwavelength Observations of a TeV-Flare from W Comae
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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 2008 June. 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) × 10 –11 cm –2 s –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 γ ≥ 100 MeV), 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 of the source from contemporaneous data taken throughout the flare.
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