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Title: Discovery of the afterglow and host galaxy of the low-redshift short GRB 080905A
Authors: Wiersema, K.
Tanvir, N. R.
O'Brien, P. T.
Pagani, C.
Levan, A. J.
Rol, E.
Hjorth, J.
Fynbo, J. P. U.
Thöne, C. C.
De Ugarte Postigo A.
Jakobsson, P.
Pagani, C.
Stamatikos, M.
First Published: 11-Oct-2010
Publisher: Oxford University Press (OUP)
Citation: Monthly Notices of the Royal Astronomical Society, 2010, 408 (1), pp. 383-391
Abstract: We present the discovery of short GRB 080905A, its optical afterglow and host galaxy. Initially discovered by Swift, our deep optical observations enabled the identification of a faint optical afterglow, and subsequently a face-on spiral host galaxy underlying the GRB position, with a chance alignment probability of <1 per cent. There is no supernova component present in the afterglow to deep limits. Spectroscopy of the galaxy provides a redshift of z= 0.1218, the lowest redshift yet observed for a short GRB. The GRB lies offset from the host galaxy centre by ∼ 18.5 kpc, in the northern spiral arm which exhibits an older stellar population than the southern arm. No emission lines are visible directly under the burst position, implying little ongoing star formation at the burst location. These properties would naturally be explained were the progenitor of GRB 080905A a compact binary merger.
DOI Link: 10.1111/j.1365-2966.2010.17115.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 ©: 2010 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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