{
  "bibcode": "2020GCN.29092....1K",
  "body": "J.A. Kennea (PSU), A. Tohuvavohu (U. Toronto), J.P. Osborne (U.\nLeicester), K.L. Page (U. Leicester), T. Sbarrato (INAF-OAB), P.\nD'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), B. Sbarufatti (PSU)\nand P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team:\n\nSwift-XRT has conducted further observations of the field of the\nINTEGRAL-detected burst GRB 201214A (Mereghetti et al. GCN Circ.\n29037). The observations now extend from T0+5.3 ks to T0+378.1 ks. The\nsource previously reported by Kennea et al. (GCN Circ. 29048), \"Source\n2\", is fading with 3-sigma significance, and is therefore likely the\nGRB afterglow. Using 2671 s of PC mode data and 4 UVOT images, we find\nan enhanced XRT position (using the XRT-UVOT alignment and matching\nUVOT field sources to the USNO-B1 catalogue): RA, Dec = 170.92446,\n+33.86930 which is equivalent to:\n\nRA (J2000): 11h 23m 41.87s\nDec(J2000): +33d 52' 09.5\"\n\nwith an uncertainty of 2.2 arcsec (radius, 90% confidence). This\nposition is 36 arcsec from the INTEGRAL position.  The source is fading\nwith alpha >0.6.\n\nA spectrum formed from the PC mode data can be fitted with an absorbed\npower-law with a photon spectral index of 2.7 (+0.9, -0.7). The\nbest-fitting absorption column is  1.9 (+2.2, -1.6) x 10^21 cm^-2, in\nexcess of the Galactic value of 2.4 x 10^20 cm^-2 (Willingale et al.\n2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion\nfactor deduced from this spectrum  is 2.6 x 10^-11 (2.6 x 10^-11) erg\ncm^-2 count^-1. \n\nA summary of the PC-mode spectrum is thus:\nTotal column:\t     1.9 (+2.2, -1.6) x 10^21 cm^-2\nGalactic foreground: 2.4 x 10^20 cm^-2\nExcess significance: 1.8 sigma\nPhoton index:\t     2.7 (+0.9, -0.7)\n\nThe results of the XRT-team automatic analysis of the likely afterglow\nare at https://www.swift.ac.uk/ToO_GRBs/00021406/Source2.php.\nThe results of the full analysis of the XRT observations are available\nat https://www.swift.ac.uk/ToO_GRBs/00021406.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 29092,
  "createdOn": 1608406110000,
  "email": "aaron.tohu@gmail.com",
  "subject": "GRB 201214A: Swift-XRT afterglow detection",
  "submitter": "Aaron Tohuvavohu at U Toronto  <aaron.tohu@gmail.com>",
  "eventId": "GRB 201214A"
}