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Title: The discovery of an evolving dust-scattered X-ray halo around GRB 031203
Authors: Vaughan, S.
Willingale, Richard
O'Brien, Paul T.
Osborne, Julian P.
Reeves, J. N.
Levan, Andrew J.
Watson, M. G.
Tedds, J. A.
Watson, D.
Santos-Lleó, M.
Rodríguez-Pascual, P. M.
Schartel, N.
First Published: 1-Mar-2004
Publisher: IOP Publishing
Citation: Astrophysical Journal Letters, 2004, 603 (1), L5-L8
Abstract: We report the first detection of a time-dependent dust-scattered X-ray halo around a gamma-ray burst (GRB). GRB 031203 was observed by XMM-Newton starting 6 hr after the burst. The halo appeared as concentric ringlike structures centered on the GRB location. The radii of these structures increased with time as t[superscript 1/2], consistent with small-angle X-ray scattering caused by a large column of dust along the line of sight to a cosmologically distant GRB. The rings are due to dust concentrated in two distinct slabs in the Galaxy located at distances of 880 and 1390 pc, consistent with known Galactic features. The halo brightness implies an initial soft X-ray pulse consistent with the observed GRB.
DOI Link: 10.1086/382785
ISSN: 2041-8205
eISSN: 2041-8213
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2004, The American Astronomical Society. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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