[vsnet-grb-info 3038] GRB 060313: Swift-XRT team refined analysis
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Mon Mar 13 15:41:38 JST 2006
TITLE: GCN GRB OBSERVATION REPORT
NUMBER: 4875
SUBJECT: GRB 060313: Swift-XRT team refined analysis
DATE: 06/03/13 06:38:57 GMT
FROM: Claudio Pagani at PSU/Swift-XRT <pagani at astro.psu.edu>
C. Pagani (PSU), D. Morris (PSU), D. Grupe (PSU) and D. Burrows (PSU) report on
behalf of the Swift XRT team:
We have analyzed the first two orbits of Swift XRT data of GRB 060313 (Pagani et
al., GCN 4867). The revised XRT position is
RA(J2000) = 04h 26m 28.5s
Dec(J2000) = -10d 50m 40.2s
We estimate an uncertainty of 4 arcseconds radius (90% containment).
The revised position is 2 acrseconds from the suggested optical afterglow
reported by Levan et al. (GCN 4871) and 1.5 arcseconds form the previously
reported XRT position (GCN 4870).
The X-ray spectrum of the data can be fitted by a single absorbed power law with
a photon index Gamma=1.70+/-0.10 and an absorption column density nH consistent
with the Galactic value of 4.7e20cm-2; Dickey & Lockman 1990.
The light curve shows a decay during with alpha=1.50+/-0.18. Assuming this decay
slope the prediction for the flux 24 hours after the trigger is 1.2e-13
ergs/s/cm2.
This circular is an official product of the Swift XRT Team.
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