Peer-Reviewed Journal Details
Mandatory Fields
Allen, C;Archambault, S;Archer, A;Benbow, W;Bird, R;Bourbeau, E;Brose, R;Buchovecky, M;Buckley, JH;Bugaev, V;Cardenzana, JV;Cerruti, M;Chen, X;Christiansen, JL;Connolly, MP;Cui, W;Daniel, MK;Eisch, JD;Falcone, A;Feng, Q;Fernandez-Alonso, M;Finley, JP;Fleischhack, H;Flinders, A;Fortson, L;Furniss, A;Gillanders, GH;Griffin, S;Grube, J;Hutten, M;Hakansson, N;Hanna, D;Hervet, O;Holder, J;Hughes, G;Humensky, TB;Johnson, CA;Kaaret, P;Kar, P;Kelley-Hoskins, N;Kertzman, M;Kieda, D;Krause, M;Krennrich, F;Kumar, S;Lang, MJ;Maier, G;McArthur, S;McCann, A;Meagher, K;Moriarty, P;Mukherjee, R;Nguyen, T;Nieto, D;O'Brien, S;de Bhroithe, AO;Ong, RA;Otte, AN;Park, N;Petrashyk, A;Pichel, A;Pohl, M;Popkow, A;Pueschel, E;Quinn, J;Ragan, K;Reynolds, PT;Richards, GT;Roache, E;Rovero, AC;Rulten, C;Sadeh, I;Santander, M;Sembroski, GH;Shahinyan, K;Telezhinsky, I;Tucci, JV;Tyler, J;Wakely, SP;Weinstein, A;Wilhelm, A;Williams, DA
2017
October
Monthly Notices Of The Royal Astronomical Society
Very-High-Energy gamma-Ray Observations of the Blazar 1ES 2344+514 with VERITAS
Published
Altmetric: 4WOS: 1 ()
Optional Fields
ACTIVE GALACTIC NUCLEI BL-LACERTAE OBJECTS BACKGROUND-RADIATION X-RAY EMISSION RADIO CONSTRAINTS VARIABILITY TELESCOPE SPECTRUM
471
2117
2123
We present very-high-energy gamma-ray observations of the BL Lac object 1ES 2344+514 taken by the Very Energetic Radiation Imaging Telescope Array System between 2007 and 2015. 1ES 2344+514 is detected with a statistical significance above the background of 20.8 sigma in 47.2 h (livetime) of observations, making this the most comprehensive very-high-energy study of 1ES 2344+514 to date. Using these observations, the temporal properties of 1ES 2344+514 are studied on short and long times-scales. We fit a constant-flux model to nightly and seasonally binned light curves and apply a fractional variability test to determine the stability of the source on different time-scales. We reject the constant-flux model for the 2007-2008 and 2014-2015 nightly binned light curves and for the long-term seasonally binned light curve at the > 3 sigma level. The spectra of the time-averaged emission before and after correction for attenuation by the extragalactic background light are obtained. The observed time-averaged spectrum above 200 GeV is satisfactorily fitted (x(2)/NDF = 7.89/6) by a power-law function with an index Gamma = 2.46 +/- 0.06(stat) +/- 0.20(sys) and extends to at least 8 TeV. The extragalactic-backgroundlight-deabsorbed spectrum is adequately fit (x(2)/NDF = 6.73/6) by a power-law function with an index Gamma = 2.15 +/- 0.06(stat) +/- 0.20(sys) while an F-test indicates that the power law with an exponential cut-off function provides a marginally better fit (x(2)/NDF = 2.56/5) at the 2.1 sigma level. The source location is found to be consistent with the published radio location and its spatial extent is consistent with a point source.
0035-8711
10.1093/mnras/stx1756
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