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On the nature of the short-duration GRB 050906
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Levan, A. J., Tanvir, Nial R., Jakobsson, Páll, Chapman, R. (Robert), Hjorth, J. (Jens), Priddey, Robert S., Fynbo, J. P. U., Hurley, K., Jensen, B. L., Johnson, R., Gorosabel, Javier, Castro-Tirado, A. J. (Alberto J.), Jarvis, Matt J., Watson, Darach and Wiersema, K. (2008) On the nature of the short-duration GRB 050906. Monthly Notices of the Royal Astronomical Society, Volume 384 (Number 2). pp. 541-547. doi:10.1111/j.1365-2966.2007.11953.x
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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 | ||||
| Library of Congress Subject Headings (LCSH): | Gamma ray bursts | ||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||
| Publisher: | Wiley | ||||
| ISSN: | 0035-8711 | ||||
| Official Date: | 21 February 2008 | ||||
| Dates: |
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| Volume: | Volume 384 | ||||
| Number: | Number 2 | ||||
| Number of Pages: | 7 | ||||
| Page Range: | pp. 541-547 | ||||
| DOI: | 10.1111/j.1365-2966.2007.11953.x | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Spain. Ministerio de Educación y Ciencia (MEC), Danmarks Grundforskningsfond [Danish National Research Foundation], Sixth Framework Programme (European Commission) (FP6) | ||||
| Grant number: | AYA2004-01515, ESP2005-07714-C03-0 (MEC), MEIF-CT-2006-042001 (FP6) |
Data sourced from Thomson Reuters' Web of Knowledge
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