[vsnet-grb-info 2337] GRB051028: Swift XRT Position

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4174
SUBJECT: GRB051028: Swift XRT Position
DATE:    05/10/29 05:11:11 GMT
FROM:    Judith Racusin at PSU  <racusin at astro.psu.edu>

J. Racusin (PSU), K. Page (U. Leicester), J. Kennea, D. Morris, C. Pagani, 
D. Burrows (PSU), N. Gehrels (GSFC) on behalf of the Swift XRT team:

The Swift XRT began observing the field of the HETE discovered GRB 051028 
(Hurley et al., GCN 4172) at 20:44:08 UT, approximately 7.1 hours after 
the trigger. We have analyzed the first 3 orbits of data and we detect an 
uncatalogued fading X-ray source at the following coordinates:

RA(J2000):   01 48 15.1
Dec(J2000): +47 45 12.5

with an estimated uncertainty of 6 arcseconds (90% containment), including 
corrections for the XRT boresight offset.  This position is 5.2 arcminutes 
from the center of the HETE error box reported in Hurley et al. (GCN 
4172).

Note that the HETE error box quoted in Hurley et al. (GCN4172) actually 
extends beyond the field of view of the XRT.  However, the source 
mentioned above is the only bright source in the field and is decaying. 
Therefore, it is likely the afterglow of GRB051028.