[vsnet-grb-info 2289] GRB051021B: Swift XRT Position
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Sat Oct 22 17:05:17 JST 2005
TITLE: GCN GRB OBSERVATION REPORT
NUMBER: 4128
SUBJECT: GRB051021B: Swift XRT Position
DATE: 05/10/22 08:03:04 GMT
FROM: Judith Racusin at PSU <racusin at astro.psu.edu>
J. Racusin, D. Morris, C. Pagani, D. Burrows, A. Retter (PSU), N. Gehrels
(GSFC) on behalf of the Swift XRT team:
The Swift XRT began observing GRB 051021B (trigger #160672, Retter et al.,
GCN 4126) at 23:33:14 UT, but was unable to obtain an on-board centroid.
Analysis of the first 2 orbits of the ground data reveal a previously
uncatalogued, fading X-ray source at the following coordinates:
RA(J2000) = 08 24 11.8
Dec(J2000) = -45 32 30.8
We estimate an uncertainty of 4 arcseconds (90% containment), including
corrections for the XRT boresight offset. This position lies 88
arcseconds from the BAT position reported in GCN 4126.
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