GCN Circular 7773
Subject
GRB 080523: Swift-XRT refined analysis
Date
2008-05-24T22:00:24Z (16 years ago)
From
Michael Stroh at PSU/Swift <stroh@astroh.org>
M. C. Stroh and D. Grupe (PSU) report on behalf of the Swift-XRT Team:
We have analyzed the first eight orbits of Swift-XRT data obtained for
GRB 080523 (Stroh et al. GCN Circ. 7767), totaling 250 s of Windowed
Timing (WT) data and 11.8ks of Photon Counting (PC) data.
The light curve can be described as a single broken power-law with an
initial decay index of 2.17 +/- 0.04 followed by a shallower decay
index of 0.56 +/- 0.27 with a break at T+3.5ks. We predict a count
rate at T+48 hours of 3.2e-3 cts/s.
The WT data (93 - 343 seconds) can be modeled as an absorbed power law
with photon index of 2.17 +/- 0.04 and a total absorbing column
density that is consistent with the Galactic value of 2.1e20 cm^-2.
The 0.3-10 keV absorbed (unabsorbed) flux during this time is 4.58e-10
(4.99e-10) erg cm^-2 s^-1.
This circular is an official product of the Swift-XRT team.