TITLE: GCN CIRCULAR NUMBER: 18693 SUBJECT: GRB 151215A: Prompt enhanced Swift-XRT position DATE: 15/12/15 03:52:01 GMT FROM: Phil Evans at U of Leicester P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Using promptly downlinked XRT event data for GRB 151215A, we find an enhanced XRT position of the afterglow: RA, Dec: 93.5840, 35.5162 which is equivalent to: RA (J2000) = 06 14 20.17 Dec (J2000) = +35 30 58.3 with an uncertainty of 2.2 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/667392. 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.