{
  "bibcode": "2007GCN..6324....1W",
  "body": "J. Wren, W.T. Vestrand, P.R. Wozniak, R. White, J. Pergande\nof Los Alamos National Laboratory report:\n \nOur Raptor telescopes responded to Swift trigger 276205\n(Stamatikos et al., GCN 6302) at 10:00:49.8 UT, 83.7 s after\nthe trigger and 7.8 s after receiving the GCN packet.  We detect\noptical emission from the counterpart reported by the KAIT team\n(Chornock et al., GCN 6304).  Our observations show that the\ncounterpart brightened from below magnitude 18.8 to 18.44 (+- .15)\nat a mid-exposure time of 10:09:27.9 UT (60s duration).  The\ncounterpart then began a slow decline but remained detectable in\nour images until we interrupted our observing sequence at\n10:47:17 UT for Swift trigger 276212.  Our unfiltered images were\ncalibrated using the R-band magnitudes from the USNO B1.0 catalog.\n \nThis information is also being transmitted via VOEvent on the\nVOEventNet.",
  "circularId": 6324,
  "createdOn": 1177026140000,
  "email": "jwren@nis.lanl.gov",
  "subject": "GRB 070419A: RAPTOR Detection of Early Emission",
  "submitter": "James Wren at LANL  <jwren@nis.lanl.gov>",
  "eventId": "GRB 070419A"
}