{
  "bibcode": "2021GCN.30329....1P",
  "body": "M. Perri (SSDC & INAF-OAR), V. D'Elia (SSDC & INAF-OAR), A. D'Ai\n(INAF-IASFPA), D.N. Burrows (PSU), J. D. Gropp (PSU), J.A. Kennea\n(PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester) and P.A.\nEvans (U. Leicester) report on behalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the\nSwift/BAT-GUANO-detected burst GRB 210626A (Aaron Tohuvavohu et al. GCN\nCirc. 30325), collecting 1.4 ks of Photon Counting (PC) mode data\nbetween T0+29.7 ks and T0+31.1 ks. \n\nAn uncatalogued X-ray source is detected and is above the 2SXPS 3-sigma\nupper limit at this position, and is therefore likely the GRB\nafterglow. Using 1180 s of PC mode data and 1 UVOT image, we find an\nenhanced XRT position (using the XRT-UVOT alignment and matching UVOT\nfield sources to the USNO-B1 catalogue): RA, Dec = 221.52429, -1.15625\nwhich is equivalent to:\n\nRA (J2000): 14h 46m 05.83s\nDec(J2000): -01d 09' 22.5\"\n\nwith an uncertainty of 5.7 arcsec (radius, 90% confidence). This\nposition is 5.7 arcmin from the Swift/BAT-GUANO position.  We cannot\ndetermine at the present time whether the source is fading.\n\nThe results of the XRT-team automatic analysis of the likely afterglow\nare at https://www.swift.ac.uk/ToO_GRBs/00021453/Source1.php.\nThe results of the full analysis of the XRT observations are available\nat https://www.swift.ac.uk/ToO_GRBs/00021453.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 30329,
  "createdOn": 1624752492000,
  "email": "aaron.tohu@gmail.com",
  "subject": "GRB 210626A: Swift-XRT afterglow detection",
  "submitter": "Aaron Tohuvavohu at U Toronto  <aaron.tohu@gmail.com>",
  "eventId": "GRB 210626A"
}