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Veritas observations of unusual extragalactic transient swift J164449.3+573451

  • We report on very high energy (>100 GeV) gamma-ray observations of Swift J164449.3+573451, an unusual transient object first detected by the Swift Observatory and later detected by multiple radio, optical, and X-ray observatories. A total exposure of 28 hr was obtained on Swift J164449.3+573451 with the Very Energetic Radiation Imaging Telescope Array System ( VERITAS) during 2011 March 28-April 15. We do not detect the source and place a differential upper limit on the emission at 500 GeV during these observations of 1.4 x 10(-12) erg cm(-2) s(-1) (99% confidence level). We also present time-resolved upper limits and use a flux limit averaged over the X-ray flaring period to constrain various emission scenarios that can accommodate both the radio-through-X-ray emission detected from the source and the lack of detection by VERITAS.

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Author details:E. Aliu, T. Arlen, T. Aune, M. Beilicke, W. Benbow, Markus Boettcher, A. Bouvier, S. M. Bradbury, J. H. Buckley, V. Bugaev, A. Cannon, A. Cesarini, L. Ciupik, E. Collins-Hughes, M. P. Connolly, W. Cui, R. Dickherber, M. Errando, A. Falcone, J. P. Finley, L. Fortson, A. Furniss, N. Galante, D. Gall, G. H. Gillanders, S. Godambe, S. Griffin, J. Grube, G. Gyuk, D. Hanna, J. Holder, H. Huan, G. Hughes, C. M. Hui, T. B. Humensky, P. Kaaret, N. Karlsson, M. Kertzman, D. Kieda, H. Krawczynski, F. Krennrich, A. S. Madhavan, G. Maier, P. Majumdar, S. McArthur, A. McCann, P. Moriarty, R. Mukherjee, R. A. Ong, M. Orr, A. N. Otte, N. Park, J. S. Perkins, A. Pichel, Martin PohlORCiDGND, H. Prokoph, J. Quinn, K. Ragan, L. C. Reyes, P. T. Reynolds, E. Roache, H. J. Rose, J. Ruppel, D. B. Saxon, M. Schroedter, G. H. Sembroski, C. Skole, A. W. Smith, D. Staszak, G. Tesic, M. Theiling, S. Thibadeau, K. Tsurusaki, J. Tyler, A. Varlotta, S. Vincent, M. Vivier, S. P. Wakely, J. E. Ward, A. Weinstein, T. Weisgarber, D. A. Williams
DOI:https://doi.org/10.1088/2041-8205/738/2/L30
ISSN:2041-8205
Title of parent work (English):The astrophysical journal : an international review of spectroscopy and astronomical physics ; Part 2, Letters
Publisher:IOP Publ. Ltd.
Place of publishing:Bristol
Publication type:Article
Language:English
Year of first publication:2011
Publication year:2011
Release date:2017/03/26
Tag:accretion, accretion disks; galaxies: active; gamma rays: galaxies; radiation mechanisms: non-thermal
Volume:738
Issue:2
Number of pages:5
Funding institution:U.S. Department of Energy; U.S. National Science Foundation; Smithsonian Institution; NSERC in Canada; Science Foundation Ireland (SFI) [10/RFP/AST2748]; STFC in the UK
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer review:Referiert
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