{
  "bibcode": "2013GCN.14761....1C",
  "body": "S. B. Cenko (GSFC) and D. A. Perley (Caltech) report on behalf of a larger\ncollaboration:\n\nWe have imaged the field of the short-hard GRB 130603B (Melandri et al.,\nGCN 14735) with the robotic Palomar 60 inch telescope.  Images were\nobtained in the r' and i' filters beginning at 04:00 on 2013 June 4 (~\n12.2 hr after the Swift trigger).\n\nAt the location of the optical afterglow (Levan et al., GCN 14742), we\ndetect a source mildly blended with the presumed host galaxy.  Using a\nlarge aperture to include both objects, we measure a magnitude of r' =\n20.8 at this time (calibrated with respect to several nearby point sources\nfrom SDSS).",
  "circularId": 14761,
  "createdOn": 1370361279000,
  "email": "cenko@srl.caltech.edu",
  "subject": "GRB 130603B: P60 Observations",
  "submitter": "S. Bradley Cenko at Caltech  <cenko@srl.caltech.edu>",
  "eventId": "GRB 130603B"
}