A Caltech Library Service

NuSTAR Observations of GRB 130427A Establish a Single Component Synchrotron Afterglow Origin for the Late Optical to Multi-GeV Emission

Kouveliotou, C. and Granot, J. and Racusin, J. L. and Bellm, E. and Vianello, G. and Oates, S. and Fryer, C. L. and Boggs, S. E. and Christensen, F. E. and Craig, W. W. and Dermer, C. D. and Gehrels, N. and Hailey, C. J. and Harrison, F. A. and Melandri, A. and McEnery, J. E. and Mundell, C. G. and Stern, D. K. and Tagliaferri, G. and Zhang, W. W. (2013) NuSTAR Observations of GRB 130427A Establish a Single Component Synchrotron Afterglow Origin for the Late Optical to Multi-GeV Emission. Astrophysical Journal Letters, 779 (1). Art. No. L1. ISSN 2041-8205. doi:10.1088/2041-8205/779/1/L1.

PDF - Published Version
See Usage Policy.

PDF - Submitted Version
See Usage Policy.


Use this Persistent URL to link to this item:


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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Kouveliotou, C.0000-0003-1443-593X
Granot, J.0000-0001-8530-8941
Bellm, E.0000-0001-8018-5348
Fryer, C. L.0000-0003-2624-0056
Boggs, S. E.0000-0001-9567-4224
Christensen, F. E.0000-0001-5679-1946
Harrison, F. A.0000-0003-2992-8024
Stern, D. K.0000-0003-2686-9241
Zhang, W. W.0000-0002-1426-9698
Additional Information:© 2013 American Astronomical Society. Received 2013 October 15; accepted 2013 November 7; published 2013 November 21. This work was supported under NASA Contract NNG08FD60C, and made use of data from the NuSTAR mission, a project led by CalTech, managed by JPL, and funded by NASA. We thank the NuSTAR Operations, Software and Calibration teams for support with the execution and analysis of these observations. This research has made use of the NuSTAR Data Analysis Software (NuSTARDAS) jointly developed by the ASI Science Data Center (ASDC, Italy) and CalTech. This work made use of data supplied by the UK Swift Science Data Centre at the University of Leicester. The Fermi/LAT Collaboration acknowledges support from NASA and DOE (U.S.), CEA/Irfu and IN2P3/CNRS (France), ASI and INFN (Italy), MEXT, KEK, and JAXA (Japan), and the K.A. Wallenberg Foundation, the Swedish Research Council and the National Space Board in Sweden. Additional support from INAF in Italy and CNES in France for science analysis during the operations phase is also gratefully acknowledged. The Liverpool Telescope is operated by Liverpool John Moores University at the Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias. C.G.M. acknowledges support from the Royal Society.
Group:NuSTAR, Space Radiation Laboratory
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Institut de recherche sur les lois fondamentales de l'Univers (Irfu)UNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)UNSPECIFIED
Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)UNSPECIFIED
Ministry of Education, Culture, Sports, Science and Technology (MEXT)UNSPECIFIED
Japan Aerospace Exploration Agency (JAXA)UNSPECIFIED
Knut and Alice Wallenberg FoundationUNSPECIFIED
Swedish Research CouncilUNSPECIFIED
Swedish National Space Board (SNSB)UNSPECIFIED
Istituto Nazionale di Astrofisica (INAF)UNSPECIFIED
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Commissariat à l’Energie Atomique (CEA)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Subject Keywords: acceleration of particles; gamma-ray burst: individual (GRB 130427A); magnetic fields; radiation mechanisms: non-thermal; shock waves
Issue or Number:1
Record Number:CaltechAUTHORS:20140108-072801401
Persistent URL:
Official Citation:NuSTAR Observations of GRB 130427A Establish a Single Component Synchrotron Afterglow Origin for the Late Optical to Multi-GeV Emission C. Kouveliotou et al. 2013 ApJ 779 L1
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43256
Deposited By: Ruth Sustaita
Deposited On:08 Jan 2014 16:12
Last Modified:10 Nov 2021 16:35

Repository Staff Only: item control page