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

Journal
Date Issued
2015
Author(s)
De Pasquale, Massimiliano
•
Kuin, N. P. M.
•
Oates, S.
•
Schulze, S.
•
Cano, Z.
•
Guidorzi, C.
•
Beardmore, A.
•
Evans, P. A.
•
Uhm, Z. L.
•
Zhang, B.
•
Page, M.
•
Kobayashi, S.
•
Castro-Tirado, A.
•
Gorosabel, J.
•
Sakamoto, T.
•
Fatkhullin, T.
•
Pandey, S. B.
•
Im, M.
•
Chandra, P.
•
Frail, D.
•
Gao, H.
•
Kopač, D.
•
Jeon, Y.
•
Akerlof, C.
•
Huang, K. Y.
•
Pak, S.
•
Park, W. -K.
•
Gomboc, A.
•
•
Zane, S.
•
Mundell, C. G.
•
Saxton, C. J.
•
Holland, S. T.
•
Virgili, F.
•
Urata, Y.
•
Steele, I.
•
Bersier, D.
•
Tanvir, N.
•
Sokolov, V. V.
•
Moskvitin, A. S.
DOI
Description
MDP, MJP, NPK, and SRO acknowledge United Kingdom Space Agency (UKSA) funding. MDP thanks M. A. Aloy, F. Daigne, and A. Mizuta for insightful discussions at ‘Supernovae and Gamma-Ray Burst 2013’ conference, Kyoto. CGM thanks the Royal Society, the Wolfson Foundation and the Science and Technology Facilities Council (STFC) for support. FG acknowledges support from STFC. APB and PAE acknowledge UKSA support. This work made use of data supplied by the UK Swift Science Data Centre at the University of Leicester. AG acknowledges funding from the Slovenian Research Agency and from the Centre of Excellence for Space Sciences and Technologies SPACE-SI, an operation partly financed by the European Union, European Regional Development Fund and Republic of Slovenia. MI, YJ, and S. Pak acknowledge the support from the Creative Initiative programme, grant No. 2008-0060544 of the National Research Foundation of Korea (NRF), funded by the Korea government (MSIP). SS acknowledges financial support from support by a Grant of Excellence from the Icelandic and the Iniciativa Cientifica Milenio grant P10-064-F (Millennium Center for Supernova Science), with input from ‘Fondo de Innovación para la Competitividad, del Ministerio de Economía, Fomento y Turismo de Chile’, and Basal-CATA (PFB-06/2007). 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. The Faulkes Telescopes, now owned by the Las Cumbres Observatory Global Telescope network, are operated with support from the Dill Faulkes Educational Trust.
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.
Volume
449
Issue
1
Start page
1024
Uri
Url
Issn Identifier
0035-8711
Ads BibCode
2015MNRAS.449.1024D
Rights
open.access
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