GCN Circular 10668
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Using 1.4 ks of promptly downlinked XRT data and 1 promptly available UVOT image we find an enhanced position of the XRT afterglow of GRB 100424A (Hoversten et al., GCN Circ. 10667) of RA, Dec 209.4478, 1.5386 which is equivalent to: RA(J2000) = 13h 57m 47.44s Dec(J2000) = +01d 32' 18.8" with an uncertainty of 2.0 arcseconds (radius, 90% containment). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/420367. Position enhancement 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.