{
  "bibcode": "2007GCN..6895....1C",
  "body": "S. B. Cenko (Caltech) reports on behalf of a larger collaboration:\n\nWe have imaged the field of GRB071011 (Marshall et al.; GCN 6882) with the\nautomated Palomar 60-inch telescope (P60).  Observations began at 12:43:38\nUT on October 11 (205 s after the burst) and we were able to obtain 3 x 60\ns images in the R, i', and z' filters before closing due to twilight.\n\nBased on comparison with the Digital Sky Survey plates, we do not find any\nnew sources inside the XRT error circle (Sbarufatti et al.; GCN 6891), as\nwas reported by Swan et al. (GCN 6894).  However, slightly outside the XRT\nerror circle (~ 8\" away), we detect a stationary, fading source at\ncoordinates (J2000.0):\n\n\tRA: 00:33:32.74   Dec: +61:08:04.4\n\nIn our initial R-band exposure, we measure a magnitude of R=17.92, using\nseveral stars from the USNO-B catalog for photometric calibration.  The\nsource fades by over a magnitude in each filter over the duration of our\nobservations.  We therefore consider this likely to be the optical\nafterglow of GRB071011.",
  "circularId": 6895,
  "createdOn": 1192144620000,
  "email": "cenko@srl.caltech.edu",
  "subject": "GRB 071011: P60 Optical Afterglow Candidate",
  "submitter": "S. Bradley Cenko at Caltech  <cenko@srl.caltech.edu>",
  "eventId": "GRB 071011"
}