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A Luminous and Isolated Gamma-Ray Flare from the Blazar B2 1215+30

  • A. U. Abeysekara
  • , S. Archambault
  • , A. Archer
  • , W. Benbow
  • , R. Bird
  • , M. Buchovecky
  • , J. H. Buckley
  • , V. Bugaev
  • , K. Byrum
  • , M. Cerruti
  • , X. Chen
  • , L. Ciupik
  • , W. Cui
  • , H. J. Dickinson
  • , J. D. Eisch
  • , M. Errando
  • , A. Falcone
  • , Q. Feng
  • , J. P. Finley
  • , H. Fleischhack
  • L. Fortson, A. Furniss, G. H. Gillanders, S. Griffin, J. Grube, M. Hütten, N. Håkansson, D. Hanna, J. Holder, T. B. Humensky, C. A. Johnson, P. Kaaret, P. Kar, M. Kertzman, D. Kieda, M. Krause, F. Krennrich, S. Kumar, M. J. Lang, G. Maier, S. McArthur, A. McCann, K. Meagher, P. Moriarty, R. Mukherjee, T. Nguyen, D. Nieto, R. A. Ong, A. N. Otte, N. Park, V. Pelassa, M. Pohl, A. Popkow, E. Pueschel, J. Quinn, K. Ragan, P. T. Reynolds, G. T. Richards, E. Roache, C. Rulten, M. Santander, G. H. Sembroski, K. Shahinyan, D. Staszak, I. Telezhinsky, J. V. Tucci, J. Tyler, S. P. Wakely, O. M. Weiner, A. Weinstein, A. Wilhelm, D. A. Williams, S. Fegan, B. Giebels, D. Horan, A. Berdyugin, J. Kuan, E. Lindfors, K. Nilsson, A. Oksanen, H. Prokoph, R. Reinthal, L. Takalo, F. Zefi
  • University of Utah
  • McGill University
  • Washington University in St. Louis
  • Center for Astrophysics | Harvard & Smithsonian
  • University College Dublin
  • University of California, Los Angeles
  • Argonne National Laboratory
  • University of Potsdam
  • c/o DESY
  • Adler Planetarium
  • Purdue University
  • Tsinghua University
  • Iowa State University
  • Barnard College
  • Pennsylvania State University
  • University of Minnesota
  • California State University - East Bay
  • IDA Business Park
  • The Bartol Research Institute
  • Columbia University
  • University of California at Santa Cruz
  • University of Iowa
  • DePauw University
  • College of Computing
  • University of Chicago
  • Cork Institute of Technology
  • Université Paris-Saclay
  • University of Turku
  • University of Turku
  • Nyrola Observatory
  • Linnaeus University, Växjö

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

20 Citations (Scopus)

Résumé

B2 1215+30 is a BL-Lac-type blazar that was first detected at TeV energies by the MAGIC atmospheric Cherenkov telescopes and subsequently confirmed by the Very Energetic Radiation Imaging Telescope Array System (VERITAS) observatory with data collected between 2009 and 2012. In 2014 February 08, VERITAS detected a large-amplitude flare from B2 1215+30 during routine monitoring observations of the blazar 1ES 1218 +304, located in the same field of view. The TeV flux reached 2.4 times the Crab Nebula flux with a variability timescale of <3.6 hr. Multiwavelength observations with Fermi-LAT, Swift, and the Tuorla Observatory revealed a correlated high GeV flux state and no significant optical counterpart to the flare, with a spectral energy distribution where the gamma-ray luminosity exceeds the synchrotron luminosity. When interpreted in the framework of a onezone leptonic model, the observed emission implies a high degree of beaming, with Doppler factor δ > 10, and an electron population with spectral index p < 2.3.

langue originaleAnglais
Numéro d'article205
journalAstrophysical Journal
Volume836
Numéro de publication2
Les DOIs
étatPublié - 20 févr. 2017
Modification externeOui

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