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The optical rebrightening of GRB100814A: An interplay of forward and reverse shocks?

De Pasquale, M; Kuin, NPM; Oates, S; Schulze, S; Cano, Z; Guidorzi, C; Beardmore, A; ... Moskvitin, AS; + view all (2015) The optical rebrightening of GRB100814A: An interplay of forward and reverse shocks? Monthly Notices of the Royal Astronomical Society , 449 (1) pp. 1024-1042. 10.1093/mnras/stv267. Green open access

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Abstract

We present a wide data set of gamma-ray, X-ray, UV/Opt/IR (UVOIR), and radio observations of the Swift GRB100814A. At the end of the slow decline phase of the X-ray and optical afterglow, this burst shows a sudden and prominent rebrightening in the optical band only, followed by a fast decay in both bands. The optical rebrightening also shows chromatic evolution. Such a puzzling behaviour cannot be explained by a single component model. We discuss other possible interpretations, and we find that a model that incorporates a long-lived reverse shock and forward shock fits the temporal and spectral properties of GRB100814 the best.

Type: Article
Title: The optical rebrightening of GRB100814A: An interplay of forward and reverse shocks?
Open access status: An open access version is available from UCL Discovery
DOI: 10.1093/mnras/stv267
Publisher version: http://dx.doi.org/10.1093/mnras/stv267
Language: English
Additional information: This article has been accepted for publication in the Royal Astronomical Society ©: 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Keywords: Gamma-ray burst: general, Radiation mechanism: non-thermal, Shock waves
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/1420680
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