[vsnet-grb-info 11702] GRB 120324A: Enhanced Swift-XRT position

GCN Circulars gcncirc at capella2.gsfc.nasa.gov
Sat Mar 24 18:09:25 JST 2012


TITLE:   GCN CIRCULAR
NUMBER:  13093
SUBJECT: GRB 120324A: Enhanced Swift-XRT position
DATE:    12/03/24 09:08:32 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 1195 s of XRT Photon Counting mode data and 1 UVOT
images for GRB 120324A, 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 = 291.07873, +24.12958 which is equivalent
to:

RA (J2000): 19h 24m 18.90s
Dec (J2000): +24d 07' 46.5"

with an uncertainty of 1.7 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, A&A, 476, 1401) and Evans
et al. (2009, MNRAS, 397, 1177).

This circular was automatically generated, and is an official product of the
Swift-XRT team.


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