{
  "bibcode": "2014GCN.16884....1P",
  "body": "D. A. Perley (Caltech) reports on behalf of a larger collaboration:\n\nThe Palomar 60-inch robotic telescope automatically triggered on the \nSwift-BAT alert for GRB 141005A (GCN 16882, D'Elia et al.) and began \nobservations of the field at 05:16:28 UT, 202 seconds after the BAT \ntrigger.  A sequence of cycling 60-second r, i, and z band images were \nacquired, ending at 05:33:20 UT.\n\nIn the initial images we identify a source inside the SPER XRT error \ncircle at the following position:\n\nRA  = 19:24:22.392\ndec = +36:05:42.26\n(J2000, +/- 0.3\")\n\nThe source is faint and probably fading, from r = 20.6 +/- 0.2 and i = \n20.0 +/- 0.2 in the initial exposures to r = 21.4 +/- 0.3 and i = 21.3 \n+/- 0.4 in the final exposures.   The source is also present in archival \nimaging of the field from SDSS.  Measuring the flux of the source in the \nsame aperture in these images yields magnitudes of g=21.9, r=21.6, \ni=21.3, z=20.7.\n\nThese observations suggest a faint optical afterglow superimposed on a \nhost galaxy or Galactic foreground star.  More observations are \nencouraged to characterize this object.",
  "circularId": 16884,
  "createdOn": 1412492037000,
  "email": "dperley@astro.caltech.edu",
  "subject": "GRB 141005A: P60 probable afterglow deteaction",
  "submitter": "Daniel Perley at Caltech  <dperley@astro.caltech.edu>",
  "eventId": "GRB 141005A"
}