TITLE: GCN CIRCULAR NUMBER: 30830 SUBJECT: GRB 210912A: Enhanced Swift-XRT position DATE: 21/09/12 20:48:34 GMT FROM: Phil Evans at U of Leicester <pae9@leicester.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 526 s of XRT Photon Counting mode data and 1 UVOT images for GRB 210912A, 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 = 129.88990, +79.22148 which is equivalent to: RA (J2000): 08h 39m 33.58s Dec (J2000): +79d 13' 17.3" with an uncertainty of 2.6 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.