[vsnet-grb-info 5551] GRB 080121: Enhanced Swift-XRT position
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Fri Jan 25 18:08:15 JST 2008
TITLE: GCN CIRCULAR
NUMBER: 7214
SUBJECT: GRB 080121: Enhanced Swift-XRT position
DATE: 08/01/25 09:07:23 GMT
FROM: Phil Evans at U of Leicester <pae9 at star.le.ac.uk>
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester)
report on behalf of the Swift-XRT team.
Using 1003 s of overlapping XRT Photon Counting mode and UVOT
V-band data for GRB 080121, we find an astrometrically corrected X-ray
position (using the XRT-UVOT alignment and matching UVOT field sources
to the USNO-B1 catalogue): RA, Dec = 137.15169, +41.84639 which is equivalent
to:
RA (J2000): 09h 08m 36.41s
Dec (J2000): +41d 50' 47.0"
with an uncertainty of 3.5 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position
can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is
described by Goad et al. (2007, astro-ph/0708.0986
http://www.swift.ac.uk/xrt_positions/Goad.pdf).
This circular was automatically generated, and is an official product of the
Swift-XRT team.
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