{
  "bibcode": "2016GCN.19073....1M",
  "body": "A. Melandri (INAF-OAB), D.N. Burrows (PSU), T.G.R. Roegiers (PSU), L.M.\nMcCauley (PSU), S.L. Gibson (U. Leicester), J.P. Osborne (U.\nLeicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC) and P.A. Evans (U.\nLeicester) report on behalf of the Swift-XRT team:\n\nSwift-XRT has conducted further observations of the field of the\nINTEGRAL-detected burst GRB 160221A (Mereghetti et al. GCN Circ.\n19046). The observations now extend from T0+21.3 ks to T0+274.5 ks. The\nsource previously reported by Melandri et al. (GCN Circ. 19050),\n\"Source 1\", is fading with 3-sigma significance, and is therefore\nlikely the GRB afterglow.  The position of this source is RA,\nDec=232.0895, -28.4551 which is equivalent to:\n\nRA (J2000): 15:28:21.48\nDec(J2000): -28:27:18.4\n\nwith an uncertainty of 4.1 arcsec (radius, 90% confidence).  This\nposition is 80 arcsec from the INTEGRAL position.  The source is fading\nwith alpha >0.5.\n\nThe results of the XRT-team automatic analysis of the likely afterglow\nare at http://www.swift.ac.uk/ToO_GRBs/00020600/index_1.php.\nThe results of the full analysis of the XRT observations are available\nat http://www.swift.ac.uk/ToO_GRBs/00020600.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 19073,
  "createdOn": 1456386534000,
  "email": "kpa@star.le.ac.uk",
  "subject": "GRB 160221A: Swift-XRT afterglow detection",
  "submitter": "Kim Page at U.of Leicester  <kpa@star.le.ac.uk>",
  "eventId": "GRB 160221A"
}