TITLE: GCN CIRCULAR NUMBER: 10825 SUBJECT: GRB 100606A: Prompt enhanced Swift-XRT position DATE: 10/06/06 20:01:25 GMT FROM: Phil Evans at U of Leicester P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Using 1374.0 ks of promptly downlinked XRT event data for GRB 100606A, we find an enhanced XRT position of the afterglow: RA, Dec: 350.6265, -66.2411 which is equivalent to: RA (J2000) = 23 22 30.37 Dec (J2000) = -66 14 28.1 with an uncertainty of 2.0 arc sec (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/424031. Position enhancement is is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177). This circular is an official product of the Swift-XRT team.