TITLE:   GCN CIRCULAR
NUMBER:  34394
SUBJECT: GRB 230812B: Improved Swift/XRT localization
DATE:    23/08/13 05:19:38 GMT
FROM:    K.L. Page at U Leicester <klp5@leicester.ac.uk>

K.L. Page (U. Leicester) reports on behalf of the Swift-XRT team:

We have analysed 1.8 ks of XRT data for GRB 230812B, starting 25.4 ks
after the Fermi trigger (GCN 34391, 34392). The data are entirely in
Photon Counting (PC) mode. The currently best available XRT position is
RA, Dec = 249.1323, 47.8574, which is equivalent to:

RA (J2000):  16 36 31.76
Dec(J2000): +47 51 26.7

with an uncertainty of 3.7 arcsec (radius, 90% confidence).

We note that this is 20 arcsec from the preliminary position given in GCN
34393.

A detailed refined analysis circular will be sent when more data are
available.

This circular is an official product of the Swift-XRT team.