GCN Circular 19073
A. Melandri (INAF-OAB), D.N. Burrows (PSU), T.G.R. Roegiers (PSU), L.M. McCauley (PSU), S.L. Gibson (U. Leicester), J.P. Osborne (U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC) 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 160221A (Mereghetti et al. GCN Circ. 19046). The observations now extend from T0+21.3 ks to T0+274.5 ks. The source previously reported by Melandri et al. (GCN Circ. 19050), "Source 1", is fading with 3-sigma significance, and is therefore likely the GRB afterglow. The position of this source is RA, Dec=232.0895, -28.4551 which is equivalent to: RA (J2000): 15:28:21.48 Dec(J2000): -28:27:18.4 with an uncertainty of 4.1 arcsec (radius, 90% confidence). This position is 80 arcsec from the INTEGRAL position. The source is fading with alpha >0.5. The results of the XRT-team automatic analysis of the likely afterglow are at http://www.swift.ac.uk/ToO_GRBs/00020600/index_1.php. The results of the full analysis of the XRT observations are available at http://www.swift.ac.uk/ToO_GRBs/00020600. This circular is an official product of the Swift-XRT team.