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Title: The first swift X-ray flash: The faint afterglow of XRF 050215B
Authors: Levan, A. J.
Osborne, J. P.
Tanvir, N. R.
Page, K. L.
Rol, E.
Zhang, B.
Goad, M. R.
O'Brien, P. T.
Priddey, R. S.
Burrows, D. N.
Chapman, R.
Fruchter, A. S.
Giommi, P.
Gehrels, N.
Hughes, M. A.
Pak, S.
Simpson, C.
Tagliaferri, G.
Vardoulaki, E.
First Published: 10-Sep-2006
Publisher: American Astronomical Society, IOP Publishing
Citation: The Astrophysical Journal, 648:1132-1138, 2006 September 10
Abstract: We present the discovery of XRF 050215B and its afterglow. The burst was detected by the Swift BAT during the check-out phase, and observations with the X-Ray Telescope began approximately 30 minutes after the burst. These observations found a faint, slowly fading X-ray afterglow near the center of the error box as reported by the BAT. Infrared data obtained at UKIRT after 10 hr also revealed a very faint K-band afterglow. The afterglow appears unusual since it is very faint, especially in the infrared, with K > 20 only 9 hr postburst. The X-ray and infrared light curves exhibit a slow, monotonic decay with α ~ 0.8 and no evidence for a steepening associated with the jet break to 10 days postburst. We discuss possible explanations for the faintness and slow decay in the context of present models for the production of X-ray flashes.
DOI Link: 10.1086/506018
ISSN: 2041-8205
eISSN: 2041-8213
Type: Journal Article
Rights: Creative Commons “Attribution Non-Commercial No Derivatives” licence CC BY-NC-ND, further details of which can be found via the following link: Archived with reference to SHERPA/RoMEO and publisher website.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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