{
  "bibcode": "2007GCN..6341....1M",
  "body": "P.A. Milne and G.G. Williams (U Arizona) report on behalf of the\nSuper-LOTIS team:\n\nThe 1.54m Kuiper telescope began R and V-band observations of the error\nregion of GRB070419A (Swift trigger 276205) at 10:26:37 UT, 27 minutes\nafter the burst.  The OT detected by Chornock et al. (GCN 6304) and\nobserved by Cenko et al., Urata et al., Rol et al., Smith et al.,\nUpdike et al., Wren et al., Williams et al., Yoshida et al., Swan et al.\n(GCN 6306/6322, 6308/6311, 6309, 6315, 6317, 6324, 6328, 6329, 6339)  is\nclearly visible in the first image and all subsequent images until\n11:36:36 UT.\n\nWe used the USNO-B star at RA=12:10:57.57, Dec=+39:55:40.2 to\nderive the R and V magnitudes. For the R-band magnitude, we use R=15.22\n(Cenko et al. GCN 6306). For the V-band magnitude, we used the\ng=15.866 and r=15.447 magnitudes from Cool et al. (GCN 6318),\nand derived a V magnitude of V=15.61 using the transformation\nequations of Jester et al. (2005).\n\nThe R-band magnitude of the afterglow in the first image is:\nUT Time       delta Time  R magnitude     error\n10:26:37      60.0 s       19.12            0.09\n\nThe V-band magnitude of the afterglow in the first V-band image is:\nUT Time       delta Time  V magnitude     error\n10:35:35      60.0 s      19.66           0.14\n\n\nThis message can be cited.",
  "circularId": 6341,
  "createdOn": 1177111429000,
  "email": "pmilne@as.arizona.edu",
  "subject": "GRB070419A: Kuiper Optical detection",
  "submitter": "Peter A. Milne at Super-LOTIS  <pmilne@as.arizona.edu>",
  "eventId": "GRB 070419A"
}