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

De Pasquale, M and Kuin, NPM and Oates, S and Schulze, S and Cano, Z and Guidorzi, C and Beardmore, A and Evans, PA and Uhm, ZL and Zhang, B and Page, M and Kobayashi, S and Castro-Tirado, A and Gorosabel, J and Sakamoto, T and Fatkhullin, T and Pandey, SB and Im, M and Chandra, P and Frail, D and Gao, H and Kopač, D and Jeon, Y and Akerlof, C and Huang, KY and Pak, S and Park, W-K and Gomboc, A and Melandri, A and Zane, S and Mundell, CG and Saxton, CJ and Holland, ST and Virgili, FJ and Urata, Y and Steele, IA and Bersier, D and Tanvir, N and Sokolov, VV and Moskvitin, AS (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. ISSN 0035-8711

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Abstract

We present a wide dataset of -ray, X-ray, 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.

Item Type: Article
Additional Information: This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record De Pasquale, M. (2015) The optical rebrightening of GRB100814A: an interplay of forward and reverse shocks? is available online at: http://dx.doi.org/10.1093/mnras/stv267
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
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Date Deposited: 22 Oct 2015 13:08
Last Modified: 22 Oct 2015 13:08
DOI or Identification number: 10.1093/mnras/stv267
URI: http://researchonline.ljmu.ac.uk/id/eprint/1492

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