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

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We report on very high energy (>100GeV) 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 28hr was obtained on Swift J164449.3+573451...

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Autores principales: Aliu, E., Arlen, T., Aune, T., Beilicke, M., Benbow, W., Böttcher, M., Bouvier, A., Bradbury, S.M., Buckley, J.H., Bugaev, V., Cannon, A., Cesarini, A., Ciupik, L., Collins-Hughes, E., Connolly, M.P., Cui, W., Dickherber, R., Errando, M., Falcone, A., Finley, J.P., Fortson, L., Furniss, A., Galante, N., Gall, D., Gillanders, G.H., Godambe, S., Griffin, S., Grube, J., Gyuk, G., Hanna, D., Holder, J., Huan, H., Hughes, G., Hui, C.M., Humensky, T.B., Kaaret, P., Karlsson, N., Kertzman, M., Kieda, D., Krawczynski, H., Krennrich, F., Madhavan, A.S., Maier, G., Majumdar, P., McArthur, S., McCann, A., Moriarty, P., Mukherjee, R., 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., Schroedter, M., Sembroski, G.H., Skole, C., Smith, A.W., Staszak, D., Teić, G., Theiling, M., Thibadeau, S., Tsurusaki, K., Tyler, J., Varlotta, A., Vincent, S., Vivier, M., Wakely, S.P., Ward, J.E., Weinstein, A., Weisgarber, T., Williams, D.A.
Formato: JOUR
Materias:
accretion, accretion disks
galaxies: active
gamma rays: galaxies
radiation mechanisms: non-thermal
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_20418205_v738_n2_p_Aliu
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:We report on very high energy (>100GeV) 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 28hr 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 500GeV during these observations of 1.4 × 10 -12 ergcm -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. © 2011 The American Astronomical Society. All rights reserved.

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