{
  "bibcode": "2005GCN..4375....1S",
  "body": "A. M. Soderberg (Caltech) and E. Berger (Carnegie Observatories) report:\n\n\"Digital image subtraction performed on the individual 240-s r-band frames\nobtained with Gemini/GMOS (GCN 4369) reveal a fading source coincident\nwith the position of the bright NIR (GCN 4367) and optical (GCN 4369)\nobject located within the XRT error circle (GCN 4366).  The fading source\nis offset from the center of the bright object, which we identify as the\nhost galaxy, by about 0.2\" to the west.  Given the offset and fading\nbehavior we conclude that this object is the afterglow of GRB 051221.\nDetailed photometry is in progress.\"",
  "circularId": 4375,
  "createdOn": 1135191890000,
  "email": "ams@astro.caltech.edu",
  "subject": "GRB 051221: Discovery of fading optical afterglow",
  "submitter": "Alicia Soderberg at Caltech  <ams@astro.caltech.edu>",
  "eventId": "GRB 051221"
}