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Title: The unusual X-ray light curve of GRB 080307: The onset of the afterglow?
Authors: Page, K. L.
Willingale, R.
O'Brien, P. T.
Tanvir, N. R.
Osborne, J. P.
Starling, R. L. C.
Zhang, B.
Holland, S. T.
Levan, A. J.
Melandri, A.
Bersier, D.
Burrows, D. N.
Geach, J. E.
Maxted, P.
First Published: 1-May-2009
Citation: Monthly Notices of the Royal Astronomical Society, 2009, 395 (1), pp. 328-334
Abstract: Swift-detected GRB 080307 showed an unusual smooth rise in its X-ray light curve around 100 s after the burst, at the start of which the emission briefly softened. This ‘hump’ has a longer duration than is normal for a flare at early times and does not demonstrate a typical flare profile. Using a two-component power-law-to-exponential model, the rising emission can be modelled as the onset of the afterglow, something which is very rarely seen in Swift-X-ray light curves. We cannot, however, rule out that the hump is a particularly slow early-time flare, or that it is caused by upscattered reverse shock electrons.
DOI Link: 10.1111/j.1365-2966.2009.14509.x
ISSN: 0035-8711
eISSN: 1365-2966
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2009 the authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. 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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