{
  "bibcode": "2008GCN..7568....1W",
  "body": "J. Wren, W.T. Vestrand, P.R. Wozniak, H. Davis\nof Los Alamos National Laboratory report:\n\nOur RAPTOR telescopes responded to Swift trigger 308041\n(Mao et al., GCN 7537) at 03:41:39.93 UTC, 23.1 seconds\nafter the trigger.  Our observations show an optical flash\n(about 10 s duration) at T ~ 60 s that is simultaneous\nwith the fourth gamma-ray peak detected by that BAT\n(Markwardt et al., GCN 7549).  Subsequently, we detect the\nrise of an optical afterglow starting at T ~ 150 s that\nlevels off to a flat plateau at around T ~ 300 s and then\nstarts to rapidly decay after about T ~ 2000 s.  The\nunfiltered measurements reported in the following table\nare calibrated to the USNO-B1 R band.\n\nt-mid(s)    exp(s)     mag     mag-err\n-----------------------------------------\n38.78       31.4      (18.3)   5 sigma limit\n58.88       5.0       17.46    0.22\n83.15       31.3      (18.4)   5 sigma limit\n141.96      22.7      17.62    0.10\n294.80      22.7      17.03    0.07\n504.74      15.0      17.15    0.06",
  "circularId": 7568,
  "createdOn": 1207601740000,
  "email": "jwren@nis.lanl.gov",
  "subject": "GRB 080330: RAPTOR detection of prompt optical flash",
  "submitter": "James Wren at LANL  <jwren@nis.lanl.gov>",
  "eventId": "GRB 080330"
}