TITLE: GCN CIRCULAR NUMBER: 22469 SUBJECT: GRB 180311A: Prompt enhanced Swift-XRT position DATE: 18/03/11 19:03:38 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 180311A, we find an enhanced XRT position of the afterglow: RA, Dec: 3.3872, -54.4914 which is equivalent to: RA (J2000) = 00 13 32.93 Dec (J2000) = -54 29 29.0 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/813721. 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.