TITLE: GCN CIRCULAR NUMBER: 20905 SUBJECT: GRB 170318A: Prompt enhanced Swift-XRT position DATE: 17/03/18 13:00:10 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 170318A, we find an enhanced XRT position of the afterglow: RA, Dec: 305.6668, 28.4066 which is equivalent to: RA (J2000) = 20 22 40.03 Dec (J2000) = +28 24 23.7 with an uncertainty of 2.1 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/743065. 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.