Swift observations of GRB050712
Abstract
We present the results of X-ray and optical observations of GRB050712 performed by Swift. The X-ray lightcurve of this burst exhibits episodes of flares in the first 1000s, the same epoch at which the UVOT detected an optical counterpart. A shallow X-ray decay, with a decay slope of -0.73, followed and lasted ~70ks. This behaviour can be explained in terms of activity of GRB 'inner engine', with the possibility of that the last flare is caused by the interaction of the ejecta with the surrounding medium. We also find interesting spectral parameters for the X-ray emission. In particular, data suggest the presence of an intrinsic absorption in the first 1000s, which can be explained if circumbust medium clouds lie along the line of sight.
Keywords
Cite
@article{arxiv.astro-ph/0605111,
title = {Swift observations of GRB050712},
author = {M. De Pasquale and D. Grupe and T. S. Poole and A. A. Breeveld and S. Zane and S. R. Rosen and M. J. Page and K. O. Mason and D. N. Burrows and H. A. Krimm. and N. Gehrels and J. A. Nousek and P. W. A. Roming and S. Kobayashi and B. Zhang},
journal= {arXiv preprint arXiv:astro-ph/0605111},
year = {2010}
}
Comments
13 pages, 5 figures. Accepted for publication by MNRAS