{
  "bibcode": "2013GCN.15252....1K",
  "body": "Klotz A. (IRAP-CNRS-OMP), Gendre B. (IRAP-CNRS-OMP),\nBoer M., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA),\nAtteia J.L. (IRAP-CNRS-OMP) report:\n\nWe imaged the field of GRB 130925A detected by SWIFT\n(trigger 571830) with the TAROT robotic telescope (D=25cm)\nlocated at the European Southern Observatory,\nLa Silla observatory, Chile.\n\nThe observations started 88.1s after the GRB trigger\n(13.0s after the notice). The elevation of the field increased from\n50 degrees above horizon and weather conditions\nwere good.\n\nWe do not detect the afterglow discovered by Sudilovsky\net al. (GCNC 15247, GCNC 15250) and confirmed by Vreeswijk\net al. (GCNC 15249). However, the observations of TAROT\ngive upper optical limits of the early afterglow.\n\nThe first image is trailed with a duration of 60.0s\n(see the description in Klotz et al., 2006, A&A 451, L39):\nt0+88.1s to t0+148.1s : Rlim = 17.5\n\nWe co-added a series of exposures with diurnal drift:\nt0+477s to t0+1081s : Rlim = 19.2\n\nMagnitudes were estimated with the nearby NOMAD1 stars\nand are not corrected for galactic dust extinction.",
  "circularId": 15252,
  "createdOn": 1380115650000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 130925A: TAROT La Silla observatory optical observations",
  "submitter": "Alain Klotz at IRAP-CNRS-OMP  <Alain.Klotz@free.fr>",
  "eventId": "GRB 130925A"
}