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Title: GRB 051210: Swift detection of a short gamma ray burst
Authors: La Parola V
Mangano, V.
Cusumano, G.
Mineo, T.
Fox, D.
Burrows, D. N.
Mészáros, P.
Zhang, B.
Krimm, H. A.
Barthelmy, S.
Gehrels, N.
Marshall, F. E.
Krimm, H. A.
Tagliaferri, G.
Campana, S.
Chincarini, G.
Moretti, A.
Romano, P.
Capalbi, M.
Giommi, P.
Perri, M.
Chincarini, G.
Mészáros, P.
O'Brien, P. T.
Palmer, D. M.
First Published: Aug-2006
Publisher: EDP Sciences for European Southern Observatory (ESO)
Citation: Astronomy & Astrophysics, 2006, 454 (3), pp. 753-757
Abstract: Aims.The short/hard GRB 051210 was detected and located by the Swift-BAT instrument and rapidly pointed towards by the narrow field instruments. The XRT was able to observe a bright, rapidly fading X-ray emission. We present the analysis of the prompt and afterglow emission of this event. Methods.The BAT spectrum is a power-law with photon index $1.0\pm0.3$. The X-ray light curve decays with slope $-2.58\pm0.11$ and shows a small flare in the early phases. The spectrum can be described with a power law with photon index $1.54\pm0.16$ and absorption $(7.5_{-3.2}^{+4.3})\times10^{20}$ cm-2. Results.We find that the X-ray emission is consistent with the hypothesis that we are observing the curvature effect of a GRB that occurred in a low density medium, with no detectable afterglow attributable to an external shock. We estimate the density of the circumburst medium to be lower than $3\times10^{-3}$ cm-3. We also discuss different hypothesis on the possible origin of the flare.
DOI Link: 10.1051/0004-6361:20065083
ISSN: 0004-6361
eISSN: 1432-0746
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2006 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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