Discovery of a new tev gamma-ray source: ver j0521+211

Halpern, J. P.; Fortin, P.; Hanna, D.; Bouvier, A.; Griffin, S.; Theiling, M.; Wakely, S. P.; Roache, E.; Quinn, J.; Krennrich, F.; Telezhinsky, I.; Archambault, S.; Arlen, T.; Holder, J.; Bird, R.; Weinstein, A.; Kumar, S.; Liu, J.; Pushkarev, A. B.; Otte, A. N.; Khassen, Y.; Maier, G.; Byrum, K.; Beilicke, M.; Aune, T.; Sembroski, G. H.; Gyuk, G.; Fegan, S. J.; Bugaev, V.; Buckley, J. H.; Cesarini, A.; Varlotta, A.; Errando, M.; Connolly, M. P.; Perkins, J. S.; McArthur, S.; Krawczynski, H.; Kovalev, Y. Y.; Gall, D.; Benbow, W.; Welsing, R.; Majumdar, P.; Furniss, A.; Staszak, D.; Hughes, G.; Feng, Q.; Böttcher, M.; Gillanders, G. H.; ,; Kieda, D.; Humensky, T. B.; Lang, M. J.; Federici, S.; Richards, G. T.; Grube, J.; Cui, W.; Smith, P. S.; Smith, A. W.; Galante, N.; Zitzer, B.; Behera, B.; Ragan, K.; Mukherjee, R.; Saxon, D. B.; Vassiliev, V. V.; Reyes, L. C.; Vincent, S.; Park, N.; Fortson, L.; Ong, R. A.; Popkow, A.; O'Faoláin de Bhróithe, A.; Moriarty, P.; McCann, A.; Falcone, A.; Finley, J. P.; Ciupik, L.; Weekes, T. C.; Kertzman, M.; Lister, M. L.; Pohl, M.; Millis, J.; Williams, D. A.; Reynolds, P. T.; Madhavan, A. S; Prokoph, H.; Kaaret, P.

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Date

2013-09-27

Author

Archambault, S.

Arlen, T.

Aune, T.

Behera, B.

Beilicke, M.

Benbow, W.

Bird, R.

Bouvier, A.

Buckley, J. H.

Bugaev, V.

Byrum, K.

Cesarini, A.

Ciupik, L.

Connolly, M. P.

Cui, W.

Errando, M.

Falcone, A.

Federici, S.

Feng, Q.

Finley, J. P.

Fortson, L.

Furniss, A.

Galante, N.

Gall, D.

Gillanders, G. H.

Griffin, S.

Grube, J.

Gyuk, G.

Hanna, D.

Holder, J.

Hughes, G.

Humensky, T. B.

Kaaret, P.

Kertzman, M.

Khassen, Y.

Kieda, D.

Krawczynski, H.

Krennrich, F.

Kumar, S.

Lang, M. J.

Madhavan, A. S

Maier, G.

Majumdar, P.

McArthur, S.

McCann, A.

Millis, J.

Moriarty, P.

Mukherjee, R.

O'Faoláin de Bhróithe, A.

Ong, R. A.

Otte, A. N.

Park, N.

Perkins, J. S.

Pohl, M.

Popkow, A.

Prokoph, H.

Quinn, J.

Ragan, K.

Reyes, L. C.

Reynolds, P. T.

Richards, G. T.

Roache, E.

Saxon, D. B.

Sembroski, G. H.

Smith, A. W.

Staszak, D.

Telezhinsky, I.

Theiling, M.

Varlotta, A.

Vassiliev, V. V.

Vincent, S.

Wakely, S. P.

Weekes, T. C.

Weinstein, A.

Welsing, R.

Williams, D. A.

Zitzer, B.

Böttcher, M.

Fegan, S. J.

Fortin, P.

Halpern, J. P.

Kovalev, Y. Y.

Lister, M. L.

Liu, J.

Pushkarev, A. B.

Smith, P. S.

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Archambault, S. Arlen, T.; Aune, T.; Behera, B.; Beilicke, M.; Benbow, W.; Bird, R.; Bouvier, A.; Buckley, J. H.; Bugaev, V.; Byrum, K.; Cesarini, A.; Ciupik, L.; Connolly, M. P.; Cui, W.; Errando, M.; Falcone, A.; Federici, S.; Feng, Q.; Finley, J. P.; Fortson, L.; Furniss, A.; Galante, N.; Gall, D.; Gillanders, G. H.; Griffin, S.; Grube, J.; Gyuk, G.; Hanna, D.; Holder, J.; Hughes, G.; Humensky, T. B.; Kaaret, P.; Kertzman, M.; Khassen, Y.; Kieda, D.; Krawczynski, H.; Krennrich, F.; Kumar, S.; Lang, M. J.; Madhavan, A. S; Maier, G.; Majumdar, P.; McArthur, S.; McCann, A.; Millis, J.; Moriarty, P.; Mukherjee, R.; O'Faoláin de Bhróithe, A.; Ong, R. A.; Otte, A. N.; Park, N.; Perkins, J. S.; Pohl, M.; Popkow, A.; Prokoph, H.; Quinn, J.; Ragan, K.; Reyes, L. C.; Reynolds, P. T.; Richards, G. T.; Roache, E.; Saxon, D. B.; Sembroski, G. H.; Smith, A. W.; Staszak, D.; Telezhinsky, I.; Theiling, M.; Varlotta, A.; Vassiliev, V. V.; Vincent, S.; Wakely, S. P.; Weekes, T. C.; Weinstein, A.; Welsing, R.; Williams, D. A.; Zitzer, B.; Böttcher, M.; Fegan, S. J.; Fortin, P.; Halpern, J. P.; Kovalev, Y. Y.; Lister, M. L.; Liu, J.; Pushkarev, A. B.; Smith, P. S.; , (2013). Discovery of a new tev gamma-ray source: ver j0521+211. The Astrophysical Journal 776 (2),

Published Version

http://iopscience.iop.org/article/10.1088/0004-637X/776/2/69/pdf

Abstract

We report the detection of a new TeV gamma-ray source, VER J0521+211, based on observations made with the VERITAS imaging atmospheric Cherenkov Telescope Array. These observations were motivated by the discovery of a cluster of &gt;30 GeV photons in the first year of Fermi Large Area Telescope observations. VER J0521+211 is relatively bright at TeV energies, with a mean photon flux of (1.93 +/- 0.13(stat) +/- 0.78(sys)) x 10(-11) cm(-2) s(-1) above 0.2 TeV during the period of the VERITAS observations. The source is strongly variable on a daily timescale across all wavebands, from optical to TeV, with a peak flux corresponding to similar to 0.3 times the steady Crab Nebula flux at TeV energies. Follow-up observations in the optical and X-ray bands classify the newly discovered TeV source as a BL Lac-type blazar with uncertain redshift, although recent measurements suggest z = 0.108. VER J0521+211 exhibits all the defining properties of blazars in radio, optical, X-ray, and gamma-ray wavelengths.

URI

http://hdl.handle.net/10379/10284

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