{
  "subject": "Possible GRB 051221B: Swift XRT position",
  "eventId": "GRB 051221B",
  "bibcode": "2005GCN..4378....1P",
  "createdOn": 1135206091000,
  "circularId": 4378,
  "submitter": "Kim Page at U.of Leicester  <kpa@star.le.ac.uk>",
  "email": "kpa@star.le.ac.uk",
  "body": "K.L. Page, J. Racusin, A.P. Beardmore, D.N. Burrows and N. Gehrels report\non behalf of the Swift-XRT team:\n\nWe have analysed the first orbit of XRT data for BAT trigger 173904 (GCN\n4376, Boyd et al.) and find a fading, uncatalogued source located at\n\nRA(J2000)  = 20h 49m 35.1s\nDec(J2000) = 53h 02m 12.2s\n\nwith an estimated uncertainty of 4.5 arcsec (90% containment). This \nincludes the latest XRT boresight correction and is 62 arcsec from the \non-board BAT position given in GCN 4376.\n\nFrom the current data, it is still not possible to determine whether the \nsource is a GRB or a hard X-ray transient."
}