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Abeysekara, AU,Archambault, S,Archer, A,Benbow, W,Bird, R,Brose, R,Buchovecky, M,Buckley, JH,Bugaev, V,Cerruti, M,Connolly, MP,Cui, W,Falcone, A,Feng, Q,Finley, JP,Fleischhack, H,Fortson, L,Furniss, A,Gillanders, GH,Griffin, S,Grube, J,Hutten, M,Hanna, D,Hervet, O,Holder, J,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,Moriarty, P,Mukherjee, R,Nieto, D,O'Brien, S,Ong, RA,Otte, AN,Park, N,Petrashyk, A,Pohl, M,Popkow, A,Pueschel, E,Quinn, J,Ragan, K,Reynolds, PT,Richards, GT,Roache, E,Rulten, C,Sadeh, I,Santander, M,Sembroski, GH,Shahinyan, K,Staszak, D,Telezhinsky, I,Tyler, J,Vassiliev, VV,Wakely, SP,Weiner, OM,Weinstein, A,Wilcox, P,Wilhelm, A,Williams, DA,Zitzer, B
2017
November
Astrophysical Journal Supplement Series
Discovery of Very-high-energy Emission from RGB J2243+203 and Derivation of Its Redshift Upper Limit
Published
Optional Fields
galaxies: individual (RGB J2243+203) EXTRAGALACTIC BACKGROUND LIGHT BL LACERTAE OBJECTS BLAZARS PARAMETERS TELESCOPE CATALOG
233
Very-high-energy (VHE; > 100 GeV) gamma-ray emission from the blazar RGB J2243+203 was discovered with the VERITAS Cherenkov telescope array, during the period between 2014 December 21 and 24. The VERITAS energy spectrum from this source can be fitted by a power law with a photon index of 4.6 +/- 0.5, and a flux normalization at 0.15 TeV of (6.3 +/- 1.1) x 10(-10) cm(-2) s(-1) TeV-1. The integrated Fermi-LAT flux from 1 to 100 GeV during the VERITAS detection is (4.1 +/- 0.8) x 10(-8) cm(-2) s(-1), which is an order of magnitude larger than the four-year-averaged flux in the same energy range reported in the 3FGL catalog, (4.0 +/- 0.1 x 10(-9) cm(-2) s(-1)). The detection with VERITAS triggered observations in the X-ray band with the Swift-XRT. However, due to scheduling constraints Swift-XRT observations were performed 67 hr after the VERITAS detection, rather than simultaneously with the VERITAS observations. The observed X-ray energy spectrum between 2 and 10 keV can be fitted with a power law with a spectral index of 2.7 +/- 0.2, and the integrated photon flux in the same energy band is (3.6 +/- 0.6) x 10(-13) cm(-2) s(-1). EBL-model-dependent upper limits of the blazar redshift have been derived. Depending on the EBL model used, the upper limit varies in the range from z < 0.9 to z < 1.1.
10.3847/1538-4365/aa8d76
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