{
  "bibcode": "2013GCN.15468....1S",
  "body": "M. C. Stroh and J. A. Kennea (PSU) report on behalf of the Swift/XRT team:\n\nSwift-XRT has observed the error circle of the Fermi/LAT GRB 131108A (Racusin et al., GCN #15464, Evans, GCN #15465) in a series of observations tiled on the sky. In 621 s of data, beginning 3.9 ks after the Fermi/LAT trigger, we detect a bright, fading, uncatalogued X-ray source at RA, Dec = 156.50066, 9.66232 which is equivalent to:\nRA (J2000.0)\t= 10h 26m 0.16s\nDec (J2000.0) = +09d 39' 44.4\"\nwith an uncertainty of 3.6 arcsec (radius, 90% confidence). We note that this position lies 14.4' from the center of the Fermi/LAT\nerror circle (GCN #15464), consistant with that position, and inside the IPN error box (GCN #15466).\n\nThis previously uncatalogued source is significantly brighter than the RASS limit and fading, and we thus consider it the likely GRB afterglow.\n\nThe source was detected in 2 overlapping fields, with target IDs:\n00020321, 00020322.\n\nThe results of the automated XRT processing of the source in these fields are available at: \nhttp://www.swift.ac.uk/xrt_products/TILED_GRB00021/00020321\nhttp://www.swift.ac.uk/xrt_products/TILED_GRB00021/00020322\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 15468,
  "createdOn": 1383967915000,
  "email": "stroh@astroh.org",
  "subject": "GRB 131108A: Swift detection of a possible X-ray afterglow",
  "submitter": "Michael Stroh at PSU/Swift  <stroh@astroh.org>",
  "eventId": "GRB 131108A"
}