TITLE: GCN CIRCULAR NUMBER: 43357 SUBJECT: GRB 260102A: Swift-XRT afterglow detection DATE: 26/01/09 06:45:08 GMT FROM: Phil Evans at U of Leicester <pae9@star.le.ac.uk> 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. View this GCN Circular online at https://gcn.nasa.gov/circulars/43357. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...