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Galaxies 2017, 5(1), 6;

Challenging the Forward Shock Model with the 80 Ms Follow up of the X-ray Afterglow of Gamma-Ray Burst 130427A

Mullard Space Science Laboratory (University College London), Holmbury St. Mary, Dorking RH5 6NT, UK
Istituto Astrofisica Spaziale e Fisica Cosmica Palermo (INAF), Palermo, Via U. La Malfa 153, 90146 Palermo, Italy
Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany
Department of Physics, University of Warwick, Coventry CV4 7AL, UK
Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
Millennium Institute of Astrophysics, Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
Department of Physics and Astronomy, University of Nevada Las Vegas, 4505 S. Maryland Parkway, Las Vegas, NV 89154-4002, USA
Centre for Astrophysics and Cosmology, Science Institute, University of Iceland, 107 Reykjavik, Iceland
Department of Physics and Mathematics University of Virgin Islands, 2 John Brewer’s Bay, St Thomas, VI 00802, USA
Etelman Observatory, University of Virgin Islands, St Thomas, VI 00802, USA
Dark Cosmology Centre, Niels Bohr Institutet, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
Istituto Astrofisica Spaziale e Fisica Cosmica di Bologna (INAF), Via P. Gobetti 101, 40129 Bologna, Italy
NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
Institute of Space Astrophysics and Planetology, Via F. Del Cavaliere 100, 00133 Rome, Italy
CNRS-ARTEMIS, Boulevard de l’Observatoire, CS 34229, 06304 Nice CEDEX 4, France
Department of Physics, University of Urbino, V. S. Chiara 27, 61029 Urbino, Italy
Author to whom correspondence should be addressed.
Academic Editor: Emilio Elizalde
Received: 31 August 2016 / Revised: 13 December 2016 / Accepted: 26 December 2016 / Published: 16 January 2017
(This article belongs to the Special Issue Gamma-Ray Bursts: Recent Theoretical Models and Observations)
View Full-Text   |   Download PDF [432 KB, uploaded 16 January 2017]   |  


GRB 130427A was the most luminous gamma-ray burst detected in the last 30 years. With an isotropic energy output of 8.5 × 10 53 erg and redshift of 0.34, it combined very high energetics with a relative proximity to Earth in an unprecedented way. Sensitive X-ray observatories such as XMM-Newton and Chandra have detected the afterglow of this event for a record-breaking baseline longer than 80 million seconds. The light curve displays a simple power-law over more than three decades in time. In this presentation, we explore the consequences of this result for a few models put forward so far to interpret GRB 130427A, and more in general the implication of this outcome in the context of the standard forward shock model. View Full-Text
Keywords: Gamma-ray bursts; X-ray afterglows; GRB modeling Gamma-ray bursts; X-ray afterglows; GRB modeling

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De Pasquale, M.; Page, M.; Kann, D.A.; Oates, S.R.; Schulze, S.; Zhang, B.; Cano, Z.; Gendre, B.; Malesani, D.; Rossi, A.; Gehrels, N.; Troja, E.; Piro, L.; Boër, M.; Stratta, G. Challenging the Forward Shock Model with the 80 Ms Follow up of the X-ray Afterglow of Gamma-Ray Burst 130427A. Galaxies 2017, 5, 6.

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