{
  "bibcode": "2015GCN.18692....1C",
  "body": "S. B. Cenko (NASA/GSFC) reports on behalf of a larger collaboration:\n\nWe have imaged the location of GRB151215A (Gibson et al., GCN 18691) with the robotic Palomar 60 inch telescope.  Observations began at 3:07 UT (~ 6 minutes after the BAT trigger) and were obtained in the r', i', and z' filters.  \n\nJust outside the XRT error circle, we find a fading source at (J2000.0) coordinates:\n\n   RA: 06:14:20.22\n   Dec: +35:30:57.2\n\nUsing calibration from nearby point sources, we find the object fades from i' = 17.47 +/- 0.05 mag at 3:07 UT to 18.58 +/- 0.15 mag at 3:24 UT.  Thus, we believe this quite likely to be the optical afterglow of GRB151215A.\n\nFurther observations are planned.",
  "circularId": 18692,
  "createdOn": 1450151449000,
  "email": "brad.cenko@nasa.gov",
  "subject": "GRB151215A: P60 Optical Afterglow Candidate",
  "submitter": "S. Bradley Cenko at NASA/GSFC  <brad.cenko@nasa.gov>",
  "eventId": "GRB 151215A"
}