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The imprint of the extragalactic background light in the gamma-ray spectra of blazars

  • M. Ackermann
  • , M. Ajello
  • , A. Allafort
  • , P. Schady
  • , L. Baldini
  • , J. Ballet
  • , G. Barbiellini
  • , D. Bastieri
  • , R. Bellazzini
  • , R. D. Blandford
  • , E. D. Bloom
  • , A. W. Borgland
  • , E. Bottacini
  • , A. Bouvier
  • , J. Bregeon
  • , M. Brigida
  • , P. Bruel
  • , R. Buehler
  • , S. Buson
  • , G. A. Caliandro
  • R. A. Cameron, P. A. Caraveo, E. Cavazzuti, C. Cecchi, E. Charles, R. C.G. Chaves, A. Chekhtman, C. C. Cheung, J. Chiang, G. Chiaro, S. Ciprini, R. Claus, J. Cohen-Tanugi, J. Conrad, S. Cutini, F. D'Ammando, F. De Palma, C. D. Dermer, S. W. Digel, E. Do Couto E Silva, A. Domínguez, P. S. Drell, A. Drlica-Wagner, C. Favuzzi, S. J. Fegan, W. B. Focke, A. Franckowiak, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, N. Gehrels, S. Germani, N. Giglietto, F. Giordano, M. Giroletti, T. Glanzman, G. Godfrey, I. A. Grenier, J. E. Grove, S. Guiriec, M. Gustafsson, D. Hadasch, M. Hayashida, E. Hays, M. S. Jackson, T. Jogler, J. Kataoka, J. Knödlseder, M. Kuss, J. Lande, S. Larsson, L. Latronico, F. Longo, F. Loparco, M. N. Lovellette, P. Lubrano, M. N. Mazziotta, J. E. McEnery, J. Mehault, P. F. Michelson, T. Mizuno, C. Monte, M. E. Monzani, A. Morselli, I. V. Moskalenko, S. Murgia, A. Tramacere, E. Nuss, J. Greiner, M. Ohno, T. Ohsugi, N. Omodei, M. Orienti, E. Orlando, J. F. Ormes, D. Paneque, J. S. Perkins, M. Pesce-Rollins, F. Piron, G. Pivato, T. A. Porter, S. Rainò, R. Rando, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, L. C. Reyes, S. Ritz, A. Rau, C. Romoli, M. Roth, M. Sánchez-Conde, D. A. Sanchez, J. D. Scargle, C. Sgrò, E. J. Siskind, G. Spandre, P. Spinelli, Łukasz Stawarz, D. J. Suson, H. Takahashi, T. Tanaka, J. G. Thayer, D. J. Thompson, L. Tibaldo, M. Tinivella, D. F. Torres, G. Tosti, E. Troja, T. L. Usher, J. Vandenbroucke, V. Vasileiou, G. Vianello, V. Vitale, A. P. Waite, B. L. Winer, K. S. Wood, M. Wood
  • c/o DESY
  • Stanford University
  • Stanford Linear Accelerator Center
  • University of California, Space Sciences Laboratory
  • Max Planck Institut für Extraterrestrische Physik
  • University of Pisa
  • Universite Paris-Saclay
  • INFN Sezione di Trieste
  • University of Trieste
  • INFN
  • University of Padova
  • Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
  • University of California at Santa Cruz
  • Politecnico di Bari
  • INFN Sezione di Bari
  • University of Sheffield
  • INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan
  • Science and Research Directorate
  • INFN Sezione di Perugia
  • University of Perugia
  • George Mason University
  • Naval Research Laboratory
  • National Research Council
  • ASI Science Data Center
  • Laboratoire Univers et Particules de Montpellier
  • Stockholm University
  • Oskar Klein Centre
  • Royal Swedish Academy of Sciences
  • INAF Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo
  • INAF-IASF
  • Hiroshima University
  • NASA Goddard Space Flight Center
  • INAF Istituto di Radioastronomia
  • Department of Astronomy, Graduate School of Science, Kyoto University
  • KTH Royal Institute of Technology
  • Waseda University
  • IRAP/CNRS
  • Université Paul Sabatier
  • INFN Sezione di Torino
  • University of Maryland
  • INFN Roma Tor Vergata
  • University of Geneva
  • ISAS/JAXA
  • University of Denver
  • Max-Planck-Institut für Physik
  • Biochemical and Environmental Engineering
  • Center for Astrophysics | Harvard & Smithsonian
  • Medical University of Innsbruck
  • California Polytechnic State University, San Luis Obispo
  • University of Washington
  • Max-Planck-Institut für Kernphysik
  • NASA Ames Research Center
  • NYCB Real-Time Computing Inc.
  • Jagiellonian University
  • Purdue University Northwest
  • Pompeu Fabra University (UPF)
  • Consorzio Interuniversitario per la Fisica Spaziale (CIFS)
  • University of Rome “Tor Vergata”
  • The Ohio State University

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

The light emitted by stars and accreting compact objects through the history of the universe is encoded in the intensity of the extragalactic background light (EBL). Knowledge of the EBL is important to understand the nature of star formation and galaxy evolution, but direct measurements of the EBL are limited by galactic and other foreground emissions. Here, we report an absorption feature seen in the combined spectra of a sample of gamma-ray blazars out to a redshift of z ∼ 1.6. This feature is caused by attenuation of gamma rays by the EBL at optical to ultraviolet frequencies and allowed us to measure the EBL flux density in this frequency band.

langue originaleAnglais
Pages (de - à)1190-1192
Nombre de pages3
journalScience
Volume338
Numéro de publication6111
Les DOIs
étatPublié - 30 nov. 2012

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