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,Santa
2017
October
Monthly Notices Of The Royal Astronomical Society
Very-High-Energy gamma-Ray Observations of the Blazar 1ES 2344+514 with VERITAS
Published
Optional Fields
astroparticle physics BL Lacertae objects: individual: 1ES 2344+514=VERJ2347+517 gamma-rays: galaxies 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.
10.1093/mnras/stx1756
Grant Details
Publication Themes