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The First Pulse of the Extremely Bright GRB 130427A: A Test Lab for Synchrotron ShocksGamma-ray burst (GRB) 130427A is one of the most energetic GRBs ever observed. The initial pulse up to 2.5 s is possibly the brightest well-isolated pulse observed to date. A fine time resolution spectral analysis shows power-law decays of the peak energy from the onset of the pulse, consistent with models of internal synchrotron shock pulses. However, a strongly correlated power-law behavior is observed between the luminosity and the spectral peak energy that is inconsistent with curvature effects arising in the relativistic outflow. It is difficult for any of the existing models to account for all of the observed spectral and temporal behaviors simultaneously.
Document ID
20150011662
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
External Source(s)
doi:10.1126/science.1242302
Authors
Preece, R. (Alabama Univ. Huntsville, AL, United States)
Burgess, J. Michael (Alabama Univ. Huntsville, AL, United States)
von Kienlin, A. (Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Bhat, P. N. (Alabama Univ. Huntsville, AL, United States)
Briggs, M. S. (Alabama Univ. Huntsville, AL, United States)
Byrne, D. (University Coll. Dublin, Ireland)
Chaplin, V. (Alabama Univ. Huntsville, AL, United States)
Cleveland, W. (Universities Space Research Association Columbia, MD, United States)
Collazzi, A. C. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Goldstein, A. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Kouveliotou, C. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Wilson-Hodge, C. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Gehrels, N. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Harding, A. K. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Nemmen, R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Racusin, J. L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Scargle, J. D. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
June 26, 2015
Publication Date
October 22, 2013
Publication Information
Publisher: Science
Subject Category
Astronomy
Report/Patent Number
GSFC-E-DAA-TN23274
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Pulse
Bright
First

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