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dc.contributor.authorAliu, E.
dc.contributor.authorAune, T.
dc.contributor.authorBeilicke, M.
dc.contributor.authorBenbow, W.
dc.contributor.authorBöttcher, M.
dc.contributor.authorBouvier, A.
dc.contributor.authorBradbury, S. M.
dc.contributor.authorBuckley, J. H.
dc.contributor.authorBugaev, V.
dc.contributor.authorCannon, A.
dc.contributor.authorCesarini, A.
dc.contributor.authorCiupik, L.
dc.contributor.authorConnolly, M. P.
dc.contributor.authorCui, W.
dc.contributor.authorDecerprit, G.
dc.contributor.authorDickherber, R.
dc.contributor.authorDuke, C.
dc.contributor.authorErrando, M.
dc.contributor.authorFalcone, A.
dc.contributor.authorFeng, Q.
dc.contributor.authorFinnegan, G.
dc.contributor.authorFortson, L.
dc.contributor.authorFurniss, A.
dc.contributor.authorGalante, N.
dc.contributor.authorGall, D.
dc.contributor.authorGillanders, G. H.
dc.contributor.authorGodambe, S.
dc.contributor.authorGriffin, S.
dc.contributor.authorGrube, J.
dc.contributor.authorGyuk, G.
dc.contributor.authorHanna, D.
dc.contributor.authorHivick, B.
dc.contributor.authorHolder, J.
dc.contributor.authorHuan, H.
dc.contributor.authorHughes, G.
dc.contributor.authorHui, C. M.
dc.contributor.authorHumensky, T. B.
dc.contributor.authorKaaret, P.
dc.contributor.authorKarlsson, N.
dc.contributor.authorKertzman, M.
dc.contributor.authorKieda, D.
dc.contributor.authorKrawczynski, H.
dc.contributor.authorKrennrich, F.
dc.contributor.authorMaier, G.
dc.contributor.authorMajumdar, P.
dc.contributor.authorMcArthur, S.
dc.contributor.authorMcCann, A.
dc.contributor.authorMoriarty, P.
dc.contributor.authorMukherjee, R.
dc.contributor.authorNelson, T.
dc.contributor.authorOng, R. A.
dc.contributor.authorOrr, M.
dc.contributor.authorOtte, A. N.
dc.contributor.authorPark, N.
dc.contributor.authorPerkins, J. S.
dc.contributor.authorPichel, A.
dc.contributor.authorPohl, M.
dc.contributor.authorProkoph, H.
dc.contributor.authorQuinn, J.
dc.contributor.authorRagan, K.
dc.contributor.authorReyes, L. C.
dc.contributor.authorReynolds, P. T.
dc.contributor.authorRoache, E.
dc.contributor.authorRose, H. J.
dc.contributor.authorRuppel, J.
dc.contributor.authorSaxon, D. B.
dc.contributor.authorSembroski, G. H.
dc.contributor.authorSkole, C.
dc.contributor.authorSmith, A. W.
dc.contributor.authorStaszak, D.
dc.contributor.authorTešić, G.
dc.contributor.authorTheiling, M.
dc.contributor.authorThibadeau, S.
dc.contributor.authorTsurusaki, K.
dc.contributor.authorTyler, J.
dc.contributor.authorVarlotta, A.
dc.contributor.authorVassiliev, V. V.
dc.contributor.authorWakely, S. P.
dc.contributor.authorWeekes, T. C.
dc.contributor.authorWeinstein, A.
dc.contributor.authorWilliams, D. A.
dc.contributor.authorZitzer, B.
dc.contributor.authorCiprini, S.
dc.contributor.authorFumagalli, M.
dc.contributor.authorKaplan, K.
dc.contributor.authorPaneque, D.
dc.contributor.authorProchaska, J. X.,
dc.identifier.citationAliu, E. Aune, T.; Beilicke, M.; Benbow, W.; Böttcher, M.; Bouvier, A.; Bradbury, S. M.; Buckley, J. H.; Bugaev, V.; Cannon, A.; Cesarini, A.; Ciupik, L.; Connolly, M. P.; Cui, W.; Decerprit, G.; Dickherber, R.; Duke, C.; Errando, M.; Falcone, A.; Feng, Q.; Finnegan, G.; Fortson, L.; Furniss, A.; Galante, N.; Gall, D.; Gillanders, G. H.; Godambe, S.; Griffin, S.; Grube, J.; Gyuk, G.; Hanna, D.; Hivick, B.; Holder, J.; Huan, H.; Hughes, G.; Hui, C. M.; Humensky, T. B.; Kaaret, P.; Karlsson, N.; Kertzman, M.; Kieda, D.; Krawczynski, H.; Krennrich, F.; Maier, G.; Majumdar, P.; McArthur, S.; McCann, A.; Moriarty, P.; Mukherjee, R.; Nelson, T.; Ong, R. A.; Orr, M.; Otte, A. N.; Park, N.; Perkins, J. S.; Pichel, A.; Pohl, M.; Prokoph, H.; Quinn, J.; Ragan, K.; Reyes, L. C.; Reynolds, P. T.; Roache, E.; Rose, H. J.; Ruppel, J.; Saxon, D. B.; Sembroski, G. H.; Skole, C.; Smith, A. W.; Staszak, D.; Tešić, G.; Theiling, M.; Thibadeau, S.; Tsurusaki, K.; Tyler, J.; Varlotta, A.; Vassiliev, V. V.; Wakely, S. P.; Weekes, T. C.; Weinstein, A.; Williams, D. A.; Zitzer, B.; Ciprini, S.; Fumagalli, M.; Kaplan, K.; Paneque, D.; Prochaska, J. X.; , (2011). Multiwavelength observations of the previously unidentified blazar rx j0648.7+1516. The Astrophysical Journal 742 (2),
dc.description.abstractWe report on the VERITAS discovery of very high energy (VHE) gamma-ray emission above 200 GeV from the high-frequency-peaked BL Lac (HBL) object RX J0648.7+1516 (GB J0648+1516), associated with 1FGL J0648.8+1516. The photon spectrum above 200 GeV is fitted by a power law dN/dE = F-0(E/E-0)(-Gamma) with a photon index Gamma of 4.4 +/- 0.8(stat) +/- 0.3(syst) and a flux normalization F-0 of (2.3 +/- 0.5(stat) +/- 1.2(sys)) x 10(-11) TeV-1 cm(-2) s(-1) with E-0 = 300 GeV. No VHE variability is detected during VERITAS observations of RX J0648.7+1516 between 2010 March 4 and April 15. Following the VHE discovery, the optical identification and spectroscopic redshift were obtained using the Shane 3 m Telescope at the Lick Observatory, showing the unidentified object to be a BL Lac type with a redshift of z = 0.179. Broadband multiwavelength observations contemporaneous with the VERITAS exposure period can be used to subclassify the blazar as an HBL object, including data from the MDM observatory, Swift-UVOT, and X-Ray Telescope, and continuous monitoring at photon energies above 1 GeV from the Fermi Large Area Telescope (LAT). We find that in the absence of undetected, high-energy rapid variability, the one-zone synchrotron self-Compton (SSC) model overproduces the high-energy gamma-ray emission measured by the Fermi-LAT over 2.3 years. The spectral energy distribution can be parameterized satisfactorily with an external-Compton or lepto-hadronic model, which have two and six additional free parameters, respectively, compared to the one-zone SSC model.
dc.publisherIOP Publishing
dc.relation.ispartofThe Astrophysical Journal
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Ireland
dc.subjectbl lacertae objects: individual (rx j0648.7+1516, 1fgl j0648.8+1516, ver j0648+152)
dc.subjectgamma rays: galaxies
dc.subjectlarge-area telescope
dc.subjectbl-lacertae objects
dc.subjectall-sky survey
dc.subjectsource catalog
dc.titleMultiwavelength observations of the previously unidentified blazar rx j0648.7+1516

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Attribution-NonCommercial-NoDerivs 3.0 Ireland
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