Very-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?
Author:
Albert J.12345, Aliu E.12345, Anderhub H.12345, Antonelli L. A.12345, Antoranz P.12345, Backes M.12345, Baixeras C.12345, Barrio J. A.12345, Bartko H.12345, Bastieri D.12345, Becker J. K.12345, Bednarek W.12345, Berger K.12345, Bernardini E.12345, Bigongiari C.12345, Biland A.12345, Bock R. K.12345, Bonnoli G.12345, Bordas P.12345, Bosch-Ramon V.12345, Bretz T.12345, Britvitch I.12345, Camara M.12345, Carmona E.12345, Chilingarian A.12345, Commichau S.12345, Contreras J. L.12345, Cortina J.12345, Costado M. T.12345, Covino S.12345, Curtef V.12345, Dazzi F.12345, De Angelis A.12345, De Cea del Pozo E.12345, de los Reyes R.12345, De Lotto B.12345, De Maria M.12345, De Sabata F.12345, Mendez C. Delgado12345, Dominguez A.12345, Dorner D.12345, Doro M.12345, Errando M.12345, Fagiolini M.12345, Ferenc D.12345, FernaÌndez E.12345, Firpo R.12345, Fonseca M. V.12345, Font L.12345, Galante N.12345, LoÌpez R. J. GarciÌa12345, Garczarczyk M.12345, Gaug M.12345, Goebel F.12345, Hayashida M.12345, Herrero A.12345, HoÌhne D.12345, Hose J.12345, Hsu C. C.12345, Huber S.12345, Jogler T.12345, Kneiske T. M.12345, Kranich D.12345, La Barbera A.12345, Laille A.12345, Leonardo E.12345, Lindfors E.12345, Lombardi S.12345, Longo F.12345, LoÌpez M.12345, Lorenz E.12345, Majumdar P.12345, Maneva G.12345, Mankuzhiyil N.12345, Mannheim K.12345, Maraschi L.12345, Mariotti M.12345, MartiÌnez M.12345, Mazin D.12345, Meucci M.12345, Meyer M.12345, Miranda J. M.12345, Mirzoyan R.12345, Mizobuchi S.12345, Moles M.12345, Moralejo A.12345, Nieto D.12345, Nilsson K.12345, Ninkovic J.12345, Otte N.12345, Oya I.12345, Panniello M.12345, Paoletti R.12345, Paredes J. M.12345, Pasanen M.12345, Pascoli D.12345, Pauss F.12345, Pegna R. G.12345, Perez-Torres M. A.12345, Persic M.12345, Peruzzo L.12345, Piccioli A.12345, Prada F.12345, Prandini E.12345, Puchades N.12345, Raymers A.12345, Rhode W.12345, RiboÌ M.12345, Rico J.12345, Rissi M.12345, Robert A.12345, RuÌgamer S.12345, Saggion A.12345, Saito T. Y.12345, Salvati M.12345, Sanchez-Conde M.12345, Sartori P.12345, Satalecka K.12345, Scalzotto V.12345, Scapin V.12345, Schmitt R.12345, Schweizer T.12345, Shayduk M.12345, Shinozaki K.12345, Shore S. N.12345, Sidro N.12345, Sierpowska-Bartosik A.12345, SillanpaÌaÌ A.12345, Sobczynska D.12345, Spanier F.12345, Stamerra A.12345, Stark L. S.12345, Takalo L.12345, Tavecchio F.12345, Temnikov P.12345, Tescaro D.12345, Teshima M.12345, Tluczykont M.12345, Torres D. F.12345, Turini N.12345, Vankov H.12345, Venturini A.12345, Vitale V.12345, Wagner R. M.12345, Wittek W.12345, Zabalza V.12345, Zandanel F.12345, Zanin R.12345, Zapatero J.12345
Affiliation:
1. UniversitaÌt WuÌrzburg, D-97074 WuÌrzburg, Germany. 2. Institut de FiÌsica d'Altes Energies, Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain. 3. ETH Zurich, CH-8093 Zurich, Switzerland. 4. Istituto Nazionale di Astrofisica (INAF) National Institute for Astrophysics, I-00136 Rome, Italy. 5. Universidad Complutense, E-28040 Madrid, Spain.
Abstract
The atmospheric Cherenkov gamma-ray telescope MAGIC, designed for a low-energy threshold, has detected very-high-energy gamma rays from a giant flare of the distant Quasi-Stellar Radio Source (in short: radio quasar) 3C 279, at a distance of more than 5 billion light-years (a redshift of 0.536). No quasar has been observed previously in very-high-energy gamma radiation, and this is also the most distant object detected emitting gamma rays above 50 gigaelectron volts. Because high-energy gamma rays may be stopped by interacting with the diffuse background light in the universe, the observations by MAGIC imply a low amount for such light, consistent with that known from galaxy counts.
Publisher
American Association for the Advancement of Science (AAAS)
Subject
Multidisciplinary
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