{
  "bibcode": "2011GCN.11730....1W",
  "body": "J. Wren, W.T. Vestrand, P.R. Wozniak, H. Davis,\nof Los Alamos National Laboratory report:\n\nThe RAPTOR telescope system responded to Swift trigger 445414\n(V. D'Elia et al., GCN 11705) under fair observing conditions. Our\nnarrow-field instruments began observing the location at 05:17:58.2 UTC,\n28.7 seconds after the initial BAT trigger.  We detect the optical\ncounterpart at the location reported by the Swift UVOT team.  The\ncounterpart brightens from below our threshold at around 100 seconds\nafter the BAT trigger.  It reaches a peak magnitude of 14.7 at T~300 s.\nThe counterpart then begins a steady decline to magnitude 16.0 at\nT~2000 s.  At that point, the counterpart re-brightens to a plateau at\nroughly magnitude 15.8 for about an hour before resuming the fading\nbehavior.  The following table gives a sample of our observations:\n\nt-mid(s)    exp(s)     mag     mag-err\n--------------------------------------------\n143.80      10.0      15.23    0.03\n352.60      10.0      14.68    0.02\n2179.60     30.0      16.12    0.03\n4522.90     30.0      15.58    0.03\n7172.30     30.0      16.00    0.04\n\nThe unfiltered images were calibrated against the USNO-B1 R-band.",
  "circularId": 11730,
  "createdOn": 1297724643000,
  "email": "jwren@nis.lanl.gov",
  "subject": "GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements",
  "submitter": "James Wren at LANL  <jwren@nis.lanl.gov>",
  "eventId": "GRB 110213A"
}