{
  "bibcode": "2007GCN..6839....1C",
  "body": "S. B. Cenko (Caltech) and D. B. Fox (Penn State) report on behalf of a\nlarger collaboration:\n\nWe have imaged the field of GRB071003 (Schady et al., GCN 6837) with the\nautomated Palomar 60-inch telescope.  Observations began approximately 3\nminutes after the burst (~ 07:44 UT 10 October) and were taken at high\nairmass (~ 2.5).  At the location of the optical afterglow candidate (Li,\nGCN 6838) we detect a fading source in the g, R, i', and z' filters.\nWhile photometry is complicated by the nearby bright star (Li, GCN 6838),\nwe estimate a magnitude of R ~ 14.5 in our first 60 s image (photometric\ncalibration was performed relative to several nearby objects from the\nUSNO-B catalog).  The corresponding decay index is ~ -1.0.",
  "circularId": 6839,
  "createdOn": 1191409119000,
  "email": "cenko@srl.caltech.edu",
  "subject": "GRB 071003: P60 Confirmation of Optical Afterglow",
  "submitter": "S. Bradley Cenko at Caltech  <cenko@srl.caltech.edu>",
  "eventId": "GRB 071003"
}