{
  "bibcode": "2014GCN.15815....1W",
  "body": "J. Wren, W.T. Vestrand, P. Wozniak, and H. Davis,\nof Los Alamos National Laboratory report:\n\nThe RAPTOR network of robotic optical telescopes made follow-up observations\nof Swift trigger 586071 (Cenko, et al., GCN 15808).  Our narrow-field\ninstruments in Los Alamos, NM, began imaging at 07:31:24.33 UT,\n26.5 seconds after the BAT trigger time.  We clearly detect the optical\ncounterpart (Perley, et al., GCN 15809).  Our first image at Tmid-Tbat=29.0s\nshows the counterpart at an unfiltered magnitude of 14.43+-.04.  The\ncounterpart fades steadily to mag 15.50+-.08 by Tmid-Tbat=65.4s.  Our\nunfiltered observations were calibrated to the USNO-B1 R-band.",
  "circularId": 15815,
  "createdOn": 1392060726000,
  "email": "jwren@nis.lanl.gov",
  "subject": "GRB 140209A: Early RAPTOR Optical Detection",
  "submitter": "James Wren at LANL  <jwren@nis.lanl.gov>",
  "eventId": "GRB 140209A"
}