The unusual X-ray light curve of GRB 080307: the onset of the afterglow?
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. ISSN 0035-8711Full text not available from this repository.
Official URL: http://dx.doi.org/10.1111/j.1365-2966.2009.14509.x
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|
|Subjects:||Q Science > QB Astronomy|
|Divisions:||Faculty of Science > Physics|
|Journal or Publication Title:||Monthly Notices of the Royal Astronomical Society|
|Official Date:||1 May 2009|
|Number of Pages:||7|
|Page Range:||pp. 328-334|
|Access rights to Published version:||Restricted or Subscription Access|
Actions (login required)