[vsnet-grb-info 4833] GRB 070621: UVOT-enhanced XRT position
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Fri Jun 22 17:56:21 JST 2007
TITLE: GCN CIRCULAR
NUMBER: 6567
SUBJECT: GRB 070621: UVOT-enhanced XRT position
DATE: 07/06/22 08:56:15 GMT
FROM: Boris Sbarufatti at INAF-IASF-Pa <sbarufatti at ifc.inaf.it>
B. Sbarufatti (INAF-IASF Pa), P. A. Evans (LU) report on behalf of
the Swift team
Using 746 s of overlapping XRT Photon Counting mode and UVOT V-band
data, 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 =
323.79225, -24.81752 which is equivalent to:
RA (J2000): 21 35 10.10
Dec (J2000): -24 49 03.1
with an uncertainty of 2.0 arcsec (90% confidence).
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