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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.
Goad, M. R.
O'Brien, P. T.
Priddey, R. S.
Burrows, D. N.
Fruchter, A. S.
Hughes, M. A.
|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.|
|Rights:||Creative Commons “Attribution Non-Commercial No Derivatives” licence CC BY-NC-ND, further details of which can be found via the following link: http://creativecommons.org/licenses/by-nc-nd/4.0/ Archived with reference to SHERPA/RoMEO and publisher website.|
|Appears in Collections:||Published Articles, Dept. of Physics and Astronomy|
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