Please use this identifier to cite or link to this item:
|Title:||A study of the prompt and afterglow emission of the short GRB 061201|
Conciatore, M. L.
Antonelli, L. A.
Conciatore, M. L.
Marshall, F. E.
Holland, S. T.
La Parola V.
Evans, P. A.
Osborne, J. P.
Page, K. L.
|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.|
|Rights:||Copyright © 2007 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.|
|Appears in Collections:||Published Articles, Dept. of Physics and Astronomy|
Files in This Item:
|aa8006-07.pdf||Published (publisher PDF)||370.88 kB||Adobe PDF||View/Open|
Items in LRA are protected by copyright, with all rights reserved, unless otherwise indicated.