{
  "bibcode": "2013GCN.14680....1C",
  "body": "S. B. Cenko (UC Berkeley) reports on behalf of a larger collaboration:\n\nWe have imaged the location of the Fermi GBM (Xiong et al., GCN 14674),\nLAT (Omodei et al., GCN 14675), Swift BAT (Cummings et al., GCN 14676),\nand Konus-Wind (Golenetskii et al., GCN 14677) GRB 130518A with the\nrobotic Palomar 60 inch telescope.  Observations were obtained in the r'\nand i' filters beginning at 10:24 UT on 2013 May 19 (~ 0.85 d after the\nGBM trigger).\n\nWe detect the optical afterglow (Evans et al., GCN 14678; Troja et al.,\nGCN 14679) in both filters.  Using several nearby point sources from SDSS\nfor calibration, we measure a magnitude of r' = 19.3 at this time.",
  "circularId": 14680,
  "createdOn": 1369022617000,
  "email": "cenko@srl.caltech.edu",
  "subject": "GRB 130518A: P60 Afterglow Observations",
  "submitter": "S. Bradley Cenko at Caltech  <cenko@srl.caltech.edu>",
  "eventId": "GRB 130518A"
}