GCN Circular 27676
M. Perri (ASDC), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), D.N. Burrows (PSU), J. D. Gropp (PSU), J.A. Kennea (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team: Swift-XRT has conducted further observations of the field of the INTEGRAL-detected burst GRB 200424A (Mereghetti et al. GCN Circ. 27634). The observations now extend from T0+17.1 ks to T0+633.1 ks. Of the sources reported by Perri et al. (GCN Circ. 27640), "Source 1" is fading with 3-sigma significance, and is therefore likely the GRB afterglow. Using 1970 s of PC mode data and 1 UVOT image, we find an enhanced XRT position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 307.50547, -39.70013 which is equivalent to: RA (J2000): 20h 30m 01.31s Dec(J2000): -39d 42' 00.5" with an uncertainty of 3.0 arcsec (radius, 90% confidence). This position is 22 arcsec from the INTEGRAL position. The source is fading with alpha >0.3. The results of the XRT-team automatic analysis of the likely afterglow are at https://www.swift.ac.uk/ToO_GRBs/00020989/Source1.php. The results of the full analysis of the XRT observations are available at https://www.swift.ac.uk/ToO_GRBs/00020989. This circular is an official product of the Swift-XRT team.