{
  "bibcode": "2013GCN.15306....1K",
  "body": "D. Kopac (U. Ljubljana), R. J. Smith (LJMU), C. G. Mundell (LJMU), N. R.\nTanvir (U. Leicester) and A. Gomboc (U. Ljubljana), on behalf of a large\ncollaboration report:\n\nThe 2-m Liverpool Telescope automatically began observing the field of GRB\n131004A (Hagen et al., GCN 15303). We detect the optical afterglow in the\nposition consistent with the NOT (Xu et al., GCN 15304) and TNG (Malesani\net al., GCN 15305). Our preliminary photometry yields:\n\nMid time from   Exp    Filter   Magnitude\ntrigger (min)   (sec)\n-------------------------------------------\n85.1            300    i'       20.2 +- 0.1\n111.3           300    i'       20.6 +- 0.1\n-------------------------------------------\n\nThe magnitudes are calibrated agains I magnitudes of nearby USNO-B1.0\nstars and are not corrected for the Galactic extinction.",
  "circularId": 15306,
  "createdOn": 1380931575000,
  "email": "drejc.kopac@fmf.uni-lj.si",
  "subject": "GRB 131004A: Liverpool Telescope optical afterglow observations",
  "submitter": "Drejc Kopac at Math Phys U,Slovenia  <drejc.kopac@fmf.uni-lj.si>",
  "eventId": "GRB 131004A"
}