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Fermi large area telescope observations of blazar 3C 279 occultations by the sun

  • G. Barbiellini
  • , D. Bastieri
  • , K. Bechtol
  • , R. Bellazzini
  • , R. D. Blandford
  • , A. W. Borgland
  • , J. Bregeon
  • , P. Bruel
  • , R. Buehler
  • , S. Buson
  • , G. A. Caliandro
  • , R. A. Cameron
  • , P. A. Caraveo
  • , E. Cavazzuti
  • , C. Cecchi
  • , R. C.G. Chaves
  • , A. Chekhtman
  • , C. C. Cheung
  • , J. Chiang
  • , S. Ciprini
  • R. Claus, J. Cohen-Tanugi, F. D'Ammando, A. De Angelis, C. D. Dermer, S. W. Digel, E. Do Couto E. Silva, P. S. Drell, A. Drlica-Wagner, C. Favuzzi, W. B. Focke, A. Franckowiak, Y. Fukazawa, P. Fusco, F. Gargano, D. Gasparrini, S. Germani, N. Giglietto, P. Giommi, F. Giordano, M. Giroletti, T. Glanzman, G. Godfrey, I. A. Grenier, J. E. Grove, S. Guiriec, D. Hadasch, M. Hayashida, E. Hays, R. E. Hughes, M. S. Jackson, T. Jogler, J. Knödlseder, M. Kuss, J. Lande, S. Larsson, F. Longo, F. Loparco, M. N. Lovellette, P. Lubrano, M. N. Mazziotta, J. Mehault, P. F. Michelson, T. Mizuno, A. A. Moiseev, C. Monte, M. E. Monzani, A. Morselli, I. V. Moskalenko, S. Murgia, R. Nemmen, E. Nuss, T. Ohsugi, N. Omodei, M. Orienti, E. Orlando, D. Paneque, J. S. Perkins, F. Piron, G. Pivato, D. Prokhorov, S. Rainò, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, S. Ritz, C. Romoli, M. Sánchez-Conde, D. A. Sanchez, C. Sgrò, E. J. Siskind, G. Spandre, P. Spinelli, H. Takahashi, T. Tanaka, L. Tibaldo, M. Tinivella, G. Tosti, E. Troja, T. L. Usher, J. Vandenbroucke, V. Vasileiou, G. Vianello, V. Vitale, A. P. Waite, B. L. Winer, K. S. Wood, Z. Yang
  • National Institute for Nuclear Physics
  • University of Trieste
  • University of Padua
  • SLAC National Accelerator Laboratory
  • Laboratoire Leprince-Ringuet
  • CSIC
  • Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
  • Italian Space Agency
  • University of Perugia
  • CEA-IRFU/CNRS/Université Paris Diderot
  • George Mason University
  • Naval Research Laboratory
  • National Research Council
  • Max Planck Institute for Astrophysics
  • Université Montpellier 2
  • National Institute for Astrophysics
  • Polytechnic University of Bari
  • Hiroshima University
  • NASA Goddard Space Flight Center
  • Kyoto University
  • Ohio State University
  • KTH Royal Institute of Technology
  • Oskar Klein Centre
  • IRAP
  • Stockholm University
  • University of Maryland
  • Max Planck Institute for Physics (Werner Heisenberg Institute)
  • University of Maryland Baltimore County
  • Harvard & Smithsonian
  • University of California at Santa Cruz
  • Innsbruck Medical University
  • Max Planck Institute for Nuclear Physics
  • NYCB Real-Time Computing Inc.
  • Consorzio Interuniversitario per la Fisica Spaziale (CIFS)
  • University of Rome Tor Vergata

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Observations of occultations of bright γ-ray sources by the Sun may reveal predicted pair halos around blazars and/or new physics, such as, e.g., hypothetical light dark matter particles - axions. We use Fermi Gamma-Ray Space Telescope (Fermi) data to analyze four occultations of blazar 3C 279 by the Sun on October 8 each year from 2008 to 2011. A combined analysis of the observations of these occultations allows a point-like source at the position of 3C 279 to be detected with significance of 3σ, but does not reveal any significant excess over the flux expected from the quiescent Sun. The likelihood ratio test rules out complete transparency of the Sun to the blazar γ-ray emission at a 3σ confidence level.

Original languageEnglish
Article number118
JournalAstrophysical Journal
Volume784
Issue number2
DOIs
Publication statusPublished - 1 Apr 2014
Externally publishedYes

Keywords

  • Sun: X-rays, gamma rays
  • astroparticle physics
  • gamma rays: general
  • occultations
  • quasars: individual (3C 279)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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