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On the nature of the short-duration GRB 050906
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Levan, A. J., Tanvir, N. R., Jakobsson, P., Chapman, R., Hjorth, J., Priddey, R. S., Fynbo, J. P. U., Hurley, K., Jensen, B. L., Johnson, R., Gorosabel, J., Castro-Tirado, A. J., Jarvis, M., Watson, D. and Wiersema, K.. (2008) On the nature of the short-duration GRB 050906. Monthly Notices of the Royal Astronomical Society, Vol.384 (No.2). pp. 541-547. ISSN 0035-8711
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Official URL: http://dx.doi.org/10.1111/j.1365-2966.2007.11953.x
Abstract
We present deep optical and infrared (IR) observations of the short-duration GRB 050906. Although no X-ray or optical/IR afterglow was discovered to deep limits, the error circle of the gamma-ray burst (GRB) (as derived from the Swift Burst Alert Telescope, or BAT) is unusual in containing the relatively local starburst galaxy IC328. This makes GRB 050906 a candidate burst from a soft gamma-ray repeater (SGR), similar to the giant flare from SGR 1806-20. The probability of chance alignment of a given BAT position with such a galaxy is small (less than or similar to 1 per cent), although the size of the error circle (2.6 arcmin radius) is such that a higher z origin cannot be ruled out. Indeed, the error circle also includes a moderately rich galaxy cluster at z = 0.43, which is a plausible location for the burst given the apparent preference that short-duration GRBs have for regions of high mass density. No residual optical or IR emission has been observed, in the form of either an afterglow or a later time emission from any associated supernova-like event. We discuss the constraints these limits place on the progenitor of GRB 050906 based on the expected optical signatures from both SGRs and merging compact object systems.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QB Astronomy |
| Divisions: | Faculty of Science > Physics |
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society |
| Publisher: | Wiley-Blackwell Publishing, Inc |
| ISSN: | 0035-8711 |
| Date: | 21 February 2008 |
| Volume: | Vol.384 |
| Number: | No.2 |
| Number of Pages: | 7 |
| Page Range: | pp. 541-547 |
| Identification Number: | 10.1111/j.1365-2966.2007.11953.x |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/30611 |
Data sourced from Thomson Reuters' Web of Knowledge
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