[vsnet-grb-info 2286] GRB051021: Swift XRT analysis
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Sat Oct 22 06:54:36 JST 2005
TITLE: GCN GRB OBSERVATION REPORT
NUMBER: 4125
SUBJECT: GRB051021: Swift XRT analysis
DATE: 05/10/21 21:52:23 GMT
FROM: Judith Racusin at PSU <racusin at astro.psu.edu>
J. Racusin, J. Kennea, D. Morris, D. Fox, D. Burrows (PSU), N. Gehrels
(GSFC) on behalf of the Swift XRT team:
XRT began observing GRB051021 (Yoshida et al., GCN 4116) at 16:28:28 UT,
approximately 3 hours after the HETE trigger. From the first 2 orbits of
data, we detect an uncatlogued fading X-ray source at:
RA(J2000): 01:56:36.4
Dec(J2000): +09:04:06.3
with an estimated uncertainty of 4 arcseconds (90% containment).
This position is 4.3 arcminutes from the HETE position reported by Yoshida
et al.(GCN 4116), and 2.7 arcseconds from the optical afterglow position
reported by Fox et al.(GCN 4120).
At the time of these observations using 4.7 ks of data, the measured flux
was 2.7x10^-12 ergs/cm^2/s. Further observations are necessary to measure
the lightcurve decay slope.
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