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The unusual X-ray light curve of GRB 080307: the onset of the afterglow?
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Page, K. L., Willingale, R, O'Brien, P. T., Tanvir, N. R., Osborne, J. P., Zhang, B., Holland, S. T., Levan, A. J., Melandri, A., Starling, R. L. C., Bersier, D., Burrows, D. N., Geach, J. E. and Maxted, P. F. L. (2009) The unusual X-ray light curve of GRB 080307: the onset of the afterglow? Monthly Notices of the Royal Astronomical Society, Vol.395 (No.1). pp. 328-334. doi:10.1111/j.1365-2966.2009.14509.x ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1111/j.1365-2966.2009.14509.x
Abstract
Swift-detected GRB080307 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.
Item Type: | Journal Article | ||||
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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: | 1 May 2009 | ||||
Dates: |
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Volume: | Vol.395 | ||||
Number: | No.1 | ||||
Number of Pages: | 7 | ||||
Page Range: | pp. 328-334 | ||||
DOI: | 10.1111/j.1365-2966.2009.14509.x | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
Data sourced from Thomson Reuters' Web of Knowledge
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