Kouveliotou 2013 NuSTAR对GRB 130427A 3 – 79 keV 的余辉观测

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Title:		NuSTAR Observations of GRB 130427A Establish a Single Component Synchrotron Afterglow Origin for the Late Optical to Multi-GeV Emission
Authors:		Kouveliotou, C.; Granot, J.; Racusin, J. L.; Bellm, E.; Vianello, G.; Oates, S.; Fryer, C. L.; Boggs, S. E.; Christensen, F. E.; Craig, W. W.; Dermer, C. D.; Gehrels, N.; Hailey, C. J.; Harrison, F. A.; Melandri, A.; McEnery, J. E.; Mundell, C. G.; Stern, D. K.; Tagliaferri, G.; Zhang, W. W.
Affiliation:		AA(Astrophysics Office/ZP12, NASA Marshall Space Flight Center, Huntsville, AL 35812, USA chryssa.kouveliotou@nasa.gov), AB(Department of Natural Sciences, The Open University of Israel, 1 University Road, P.O. Box 808, Ra'anana 43537, Israel granot@openu.ac.il), AC(NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA judith.racusin@nasa.gov), AD(Cahill Center for Astronomy and Astrophysics, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA), AE(W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305, USA), AF(Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK), AG(CCS-2, Los Alamos National Laboratory, Los Alamos, NM 87545, USA), AH(Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA), AI(DTU Space-National Space Institute, Technical University of Denmark, Elektrovej 327, 2800 Lyngby, Denmark), AJ(Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA; Lawrence Livermore National Laboratory, Livermore, CA 94550, USA), AK(Code 7653, National Research Laboratory, Washington, DC 20375-5352, USA), AL(NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA), AM(Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USA), AN(Cahill Center for Astronomy and Astrophysics, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA), AO(INAF-Osservatorio Astronomico di Brera, via E. Bianchi 46, I-23807 Merate, Italy), AP(NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA), AQ(Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool Science Park, Liverpool L3 5RF, UK), AR(Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA), AS(INAF-Osservatorio Astronomico di Brera, via E. Bianchi 46, I-23807 Merate, Italy), AT(NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA)
Publication:		The Astrophysical Journal Letters, Volume 779, Issue 1, article id. L1, 6 pp. (2013). (ApJL Homepage)
Publication Date:		12/2013
Origin:		IOP
Astronomy Keywords:		acceleration of particles, gamma-ray burst: individual: GRB 130427A, magnetic fields, radiation mechanisms: non-thermal, shock waves
DOI:		10.1088/2041-8205/779/1/L1
Bibliographic Code:		2013ApJ...779L...1K

Abstract

GRB 130427A occurred in a relatively nearby galaxy; its prompt emission had the largest GRB fluence ever recorded. The afterglow of GRB 130427A was bright enough for the Nuclear Spectroscopic Telescope ARray (NuSTAR) to observe it in the 3-79 keV energy range long after its prompt emission (~1.5 and 5 days). This range, where afterglow observations were previously not possible, bridges an important spectral gap. Combined with Swift, Fermi, and ground-based optical data, NuSTAR observations unambiguously establish a single afterglow spectral component from optical to multi-GeV energies a day after the event, which is almost certainly synchrotron radiation. Such an origin of the late-time Fermi/Large Area Telescope >10 GeV photons requires revisions in our understanding of collisionless relativistic shock physics.

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