Swift observations of GRB 050712

Massimiliano De Pasquale, Dirk Grupe, T. S. Poole, A. A. Breeveld, S. Zane, S. R. Rosen, M. J. Page, K. O. Mason, D. N. Burrows, H. A. Krimm, N. Gehrels, J. A. Nousek, P. W.A. Roming, S. Kobayashi, B. Zhang

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11 Scopus citations

Abstract

We present the results of X-ray and optical observations of GRB 050712 performed by Swift. The X-ray light curve of this burst exhibits episodes of flares in the first 1000 s, the same epoch at which the UVOT detected an optical counterpart. A shallow X-ray decay, with a decay slope of α = -0.73, followed and lasted ∼70 ks. This behaviour can be explained in terms of activity of the gamma-ray burst 'inner engine', with the possibility 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 1000 s, which can be explained if circumburst medium clouds lie along the line of sight.

Original languageEnglish (US)
Pages (from-to)1859-1866
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Volume370
Issue number4
DOIs
StatePublished - Aug 2006

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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