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dc.contributor.authorGillanders, Gary
dc.date.accessioned2014-11-17T10:47:48Z
dc.date.available2014-11-17T10:47:48Z
dc.date.issued2011
dc.identifier.citationE. Aliu, T. Aune, M. Beilicke, W. Benbow, M. B\"ottcher, A. Bouvier, S. M. Bradbury, J. H. Buckley, V. Bugaev, A. Cannon, A. Cesarini, L. Ciupik, M. P. Connolly, W. Cui, G. Decerprit, R. Dickherber, C. Duke, M. Errando, A. Falcone, Q. Feng, G. Finnegan, L. Fortson, A. Furniss, N. Galante, D. Gall, G. H. Gillanders, S. Godambe, S. Griffin, J. Grube, G. Gyuk, D. Hanna, B. Hivick, J. Holder, H. Huan, G. Hughes, C. M. Hui, T. B. Humensky, P. Kaaret, N. Karlsson, M. Kertzman, D. Kieda, H. Krawczynski, F. Krennrich, G. Maier, P. Majumdar, S. McArthur, A. McCann, P. Moriarty, R. Mukherjee, T. Nelson, R. A. Ong, M. Orr, A. N. Otte, N. Park, J. S. Perkins, A. Pichel, M. Pohl, H. Prokoph, J. Quinn, K. Ragan, L. C. Reyes, P. T. Reynolds, E. Roache, H. J. Rose, J. Ruppel, D. B. Saxon, G. H. Sembroski, C. Skole, A. W. Smith, D. Staszak, G. Tesic, M. Theiling, S. Thibadeau, K. Tsurusaki, J. Tyler, A. Varlotta, V. V. Vassiliev, S. P. Wakely, T. C. Weekes, A. Weinstein, D. A. Williams, B. Zitzer (The VERITAS Collaboration), S. Ciprini, M. Fumagalli, K. Kaplan, D. Paneque, J. X. Prochaska(2011)Multiwavelength Observations of the Previously Unidentified Blazar RX J0648.7+1516,en_US
dc.identifier.urihttp://hdl.handle.net/10379/4726
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 object RXJ0648.7+1516 (GBJ0648+1516), associated with 1FGLJ0648.8+1516. The photon spectrum above 200 GeV is fit by a power law dN/dE = F0(E/E0)-{\Gamma} with a photon index {\Gamma} of 4.4 {\pm} 0.8stat {\pm}0.3syst and a flux normalization F0 of (2.3 {\pm}0.5stat {\pm} 1.2sys) {\times} 10-11 TeV-1cm-2s-1 with E0 = 300 GeV. No VHE vari- ability is detected during VERITAS observations of RXJ0648.7+1516 between 2010 March 4 and April 15. Following the VHE discovery, the optical identifica- tion 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 sub-classify the blazar as a high-frequency-peaked BL Lac (HBL) object, including data from the MDM ob- servatory, Swift-UVOT and XRT, 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 model (SSC) overproduces the high-energy gamma-ray emission measured by the Fermi-LAT over 2.3 years. The SED can be parameterized sat- isfactorily 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.formatapplication/pdfen_US
dc.language.isoenen_US
dc.subjectAstrophysics - High Energy Astrophysical Phenomena
dc.titleMultiwavelength Observations of the Previously Unidentified Blazar RX J0648.7+1516en_US
dc.typeArticleen_US
dc.local.publishedsourcehttp://arxiv.org/pdf/1110.5949en_US
dc.description.peer-reviewedpeer-revieweden_US
dc.local.authorsE. Aliu, T. Aune, M. Beilicke, W. Benbow, M. B\"ottcher, A. Bouvier, S. M. Bradbury, J. H. Buckley, V. Bugaev, A. Cannon, A. Cesarini, L. Ciupik, M. P. Connolly, W. Cui, G. Decerprit, R. Dickherber, C. Duke, M. Errando, A. Falcone, Q. Feng, G. Finnegan, L. Fortson, A. Furniss, N. Galante, D. Gall, G. H. Gillanders, S. Godambe, S. Griffin, J. Grube, G. Gyuk, D. Hanna, B. Hivick, J. Holder, H. Huan, G. Hughes, C. M. Hui, T. B. Humensky, P. Kaaret, N. Karlsson, M. Kertzman, D. Kieda, H. Krawczynski, F. Krennrich, G. Maier, P. Majumdar, S. McArthur, A. McCann, P. Moriarty, R. Mukherjee, T. Nelson, R. A. Ong, M. Orr, A. N. Otte, N. Park, J. S. Perkins, A. Pichel, M. Pohl, H. Prokoph, J. Quinn, K. Ragan, L. C. Reyes, P. T. Reynolds, E. Roache, H. J. Rose, J. Ruppel, D. B. Saxon, G. H. Sembroski, C. Skole, A. W. Smith, D. Staszak, G. Tesic, M. Theiling, S. Thibadeau, K. Tsurusaki, J. Tyler, A. Varlotta, V. V. Vassiliev, S. P. Wakely, T. C. Weekes, A. Weinstein, D. A. Williams, B. Zitzer (The VERITAS Collaboration), S. Ciprini, M. Fumagalli, K. Kaplan, D. Paneque, J. X. Prochaska
dc.local.arxivid1110.5949
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