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Discovery of the afterglow and host galaxy of the low-redshift short GRB 080905A
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Rowlinson, A., Wiersema, K., Levan, A. J., Tanvir, N. R., O'Brien, P. T., Rol, E., Hjorth, J., Thoene, C. C., Postigo, A. de Ugarte, Fynbo, J. P. U., Jakobsson, P., Pagani, C. and Stamatikos, M. (2010) Discovery of the afterglow and host galaxy of the low-redshift short GRB 080905A. Monthly Notices of the Royal Astronomical Society, Vol.408 (No.1). pp. 383-391. doi:10.1111/j.1365-2966.2010.17115.x ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1111/j.1365-2966.2010.17115.x
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 similar to 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.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||
| Publisher: | Wiley | ||||
| ISSN: | 0035-8711 | ||||
| Official Date: | 11 October 2010 | ||||
| Dates: |
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| Volume: | Vol.408 | ||||
| Number: | No.1 | ||||
| Number of Pages: | 9 | ||||
| Page Range: | pp. 383-391 | ||||
| DOI: | 10.1111/j.1365-2966.2010.17115.x | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Science and Technology Funding Council, European Community, Icelandic Research Fund, DNRF, British Council and Platform Beta Techniek through the Partnership Programme in Science | ||||
| Grant number: | PERG03-GA-2008-226653, PPS WS 005 |
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