GCN Circular 43357

M.G. Bernardini (INAF-OAB), S. Dichiara (PSU), J.A. Kennea (PSU), D.N.
Burrows (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester),
E. Ambrosi  (INAF-IASFPA) , M. Capalbi (INAF-OAR) and P.A. Evans (U.
Leicester) reports on behalf of the Swift-XRT team:

Swift-XRT has conducted further observations of the field of the
SVOM/ECLAIRs-detected burst GRB 260102A. The observations now extend
from T0+9.6 ks to T0+582.4 ks and have a total exposure time of 7.3 ks.
The source previously reported, "Source 2", is fading with >3-sigma
significance, and is therefore likely the GRB afterglow. Using 838 s of
PC mode data and 1 UVOT image, we find an enhanced XRT position (using
the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1
catalogue): RA, Dec = 183.94925, +48.25058 which is equivalent to:

RA (J2000): 12h 15m 47.82s
Dec(J2000): +48d 15' 02.1"

with an uncertainty of 6.2 arcsec (radius, 90% confidence). This
position is 2.8 arcmin from the SVOM/ECLAIRs position.	The source is
fading with alpha >0.2.

The results of the XRT-team automatic analysis of the likely afterglow
are at https://www.swift.ac.uk/ToO_GRBs/00021896/Source2.php.
The results of the full analysis of the XRT observations are available
at https://www.swift.ac.uk/ToO_GRBs/00021896.

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