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Title: A study of the prompt and afterglow emission of the short GRB 061201
Authors: Stratta, G.
Preger, B.
Perri, M.
Conciatore, M. L.
Capalbi, M.
Giommi, P.
D'Avanzo, P.
Covino, S.
Guidorzi, C.
Campana, S.
Fugazza, D.
Moretti, A.
Tagliaferri, G.
Piranomonte, S.
Stella, L.
Guetta, D.
Antonelli, L. A.
D'Elia, V.
Fiore, F.
Cutini, S.
Conciatore, M. L.
Burrows, D.
Marshall, F. E.
Holland, S. T.
Stamatikos, M.
Guidorzi, C.
Chincarini, G.
La Parola V.
Romano, P.
Mangano, V.
Cusumano, G.
Mineo, T.
Evans, P. A.
Osborne, J. P.
Page, K. L.
First Published: Nov-2007
Publisher: EDP Sciences for European Southern Observatory (ESO)
Citation: Astronomy and Astrophysics, 2007, 474 (3), pp. 827-835
Abstract: Context: Our knowledge of the intrinsic properties of short duration Gamma-Ray Bursts has relied, so far, only upon a few cases for which the estimate of the distance and an extended, multiwavelength monitoring of the afterglow have been obtained. Aims: We carried out multiwavelength observations of the short GRB 061201 aimed at estimating its distance and studying its properties. Methods.We performed a spectral and timing analysis of the prompt and afterglow emission and discuss the results in the context of the standard fireball model. Results: A clear temporal break was observed in the X-ray light curve about 40 min after the burst trigger. We find that the spectral and timing behaviour of the X-ray afterglow is consistent with a jet origin of the observed break, although the optical data can not definitively confirm this and other scenarios are possible. No underlying host galaxy down to R ~ 26 mag was found after fading of the optical afterglow. Thus, no secure redshift could be measured for this burst. The nearest galaxy is at z = 0.111 and shows evidence of star formation activity. We discuss the association of GRB 061201 with this galaxy and with the ACO S 995 galaxy cluster, from which the source is at an angular distance of 17'' and 8.5', respectively. We also test the association with a possible undetected, positionally consistent galaxy at z ~ 1. In all these cases, in the jet interpretation, we find a jet opening angle of 1-2 degrees.
DOI Link: 10.1051/0004-6361:20078006
ISSN: 0004-6361
eISSN: 1432-0746
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2007 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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