Journal Article

DESY-2014-00171

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png MULTIWAVELENGTH OBSERVATIONS AND MODELING OF 1ES 1959+650 IN A LOW FLUX STATE

Aliu, E. (Corresponding author) ; Archambault, S. ; Arlen, T. ; Aune, T. ; Beilicke, M.Extern* ; Benbow, W. ; Bird, R. ; Böttcher, M.Extern* ; Bouvier, A. ; Bugaev, V. ; Byrum, K. ; Cesarini, A. ; Ciupik, L. ; Collins-Hughes, E. ; Connolly, M. P. ; Cui, W. ; Dickherber, R. ; Duke, C. ; Dumm, J. ; Errando, M. ; Falcone, A. ; Federici, S.Extern* ; Feng, Q. ; Finley, J. P. ; Finnegan, G. ; Fortson, L. ; Furniss, A. ; Galante, N. ; Gall, D. ; Gillanders, G. H. ; Griffin, S. ; Grube, J. ; Gyuk, G. ; Hanna, D. ; Holder, J. ; Hughes, G.DESY* ; Humensky, T. B. ; Kaaret, P. ; Kertzman, M. ; Khassen, Y. ; Kieda, D. ; Krawczynski, H. ; Krennrich, F. ; Lang, M. J. ; Madhavan, A. S. ; Maier, G.DESY* ; Majumdar, P.Extern* ; McArthur, S. ; McCann, A. ; Moriarty, P. ; Mukherjee, R. ; Nelson, T. ; O'Faoláin de Bhróithe, A. ; Ong, R. A. ; Orr, M. ; Otte, A. N. ; Park, N. ; Perkins, J. S. ; Pichel, A. ; Pohl, M.DESY* ; Popkow, A. ; Prokoph, H.DESY* ; Quinn, J. ; Ragan, K. ; Reyes, L. C. ; Reynolds, P. T. ; Roache, E. ; Saxon, D. B. ; Schroedter, M. ; Sembroski, G. H. ; Skole, C.DESY* ; Smith, A. W. ; Staszak, D. ; Telezhinsky, I.DESY* ; Theiling, M. ; Tyler, J. ; Varlotta, A. ; Vassiliev, V. V. ; Wakely, S. P. ; Weekes, T. C. ; Weinstein, A. ; Welsing, R.DESY* ; Williams, D. A. ; Zitzer, B.

2013
Univ.11032 Chicago, Ill. [u.a.]

This record in other databases:        

Please use a persistent id in citations: doi:10.1088/0004-637X/775/1/3

Abstract: We report on the VERITAS observations of the high-frequency peaked BL Lac object 1ES 1959+650 in the period 2007-2011. This source is detected at TeV energies by VERITAS at 16.4 standard deviation (σ) significance in 7.6 hr of observation in a low flux state. A multiwavelength spectral energy distribution (SED) is constructed from contemporaneous data from VERITAS, Fermi-LAT, RXTE PCA, and Swift UVOT. Swift XRT data is not included in the SED due to a lack of simultaneous observations with VERITAS. In contrast to the orphan γ-ray flare exhibited by this source in 2002, the X-ray flux of the source is found to vary by an order of magnitude, while other energy regimes exhibit less variable emission. A quasi-equilibrium synchrotron self-Compton model with an additional external radiation field is used to describe three SEDs corresponding to the lowest, highest, and average X-ray states. The variation in the X-ray spectrum is modeled by changing the electron injection spectral index, with minor adjustments of the kinetic luminosity in electrons. This scenario produces small-scale flux variability of the order of lsim 2 in the high energy (E > 1 MeV) and very high energy (E > 100 GeV) γ-ray regimes, which is corroborated by the Fermi-LAT, VERITAS, and Whipple 10 m telescope light curves.

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Contributing Institute(s):

1. Theoretische Astroteilchenphysik (Z_THAT)

Research Program(s):

1. 52x - Programm Astroteilchenphysik - Topic unbekannt (POF2-52x) (POF2-52x)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2013

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Database coverage:
; ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection ; Zoological Record

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