{
  "bibcode": "2014GCN.17063....1K",
  "body": "Klotz A., Turpin D. (IRAP-CNRS-OMP),\nBoer M., Gendre B., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA),\nAtteia J.L. (IRAP-CNRS-OMP) report:\n\nWe imaged the field of GRB 141109A detected by SWIFT\n(trigger 618024) with the TAROT robotic telescope (D=25cm)\nlocated at the European Southern Observatory,\nLa Silla observatory, Chile.\n\nThe observations started 93s after the GRB trigger\n(18s after the notice). The elevation of the field increased from\n10 degrees above horizon and weather conditions were good.\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).\nThis image was obtained when the gamma emission was still\nvery active. We do not detect any OT with a limiting magnitude of:\n\nt0+93s to t0+153s : Rlim = 12.9\n\nThe optical afterglow reported by Covino (GCNC 17039)\nis detected in co added images (in tracking mode):\n\n  t0+465s to  t0+655s : Rlim = 17.3\n  t0+665s to  t0+868s : R = 16.8\n  t0+879s to t0+1069s : R = 16.1\nt0+1093s to t0+1283s : R = 16.7\nt0+1293s to t0+1497s : Rlim = 17.2\n\nThe TAROT photometry indicates that the optical afterglow\nreached the maximum of light about 16 minutes after the\nSwift trigger.\n\nMagnitudes were estimated with the nearby NOMAD1 stars\nand are not corrected for galactic dust extinction.",
  "circularId": 17063,
  "createdOn": 1415834277000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 141109A: TAROT La Silla observatory optical observations",
  "submitter": "Alain Klotz at IRAP-CNRS-OMP  <Alain.Klotz@free.fr>",
  "eventId": "GRB 141109A"
}