{
  "bibcode": "2018GCN.22488....1K",
  "body": "Klotz A., Noysena K., Atteia J.L. (CNRS-OMP-IRAP),\nBoer M., Eymar L. (CNRS-ARTEMIS),\nGendre B. (UVI - Etelman Obs.) report:\n\nWe imaged the field of GRB 180314A detected by SWIFT\n(trigger 814129) with the TAROT robotic telescope (D=25cm)\nlocated at the European Southern Observatory,\nLa Silla observatory, Chile.\n\nThe observations started 172.7s after the GRB trigger\n(83.1s after the notice). The elevation of the field decreased from\n77 degrees above horizon and weather conditions were good.\n\nWe detected the candidate couterpart mentioned by D'Avanzo et al.\n(GCNC 22478), Bolmer (GCNC 22479), Lipunov et al. (GCNC 22481),\nMelandri et al. (GCNC 22482) Sbarufatti et al. (GCNC 22484),\nGuidorzi et al. (GCNC 22487). TAROT photometry is:\n\nt1(h) t2(h) r(AB) 1sig\n0.048 0.056 15.64 0.05\n0.059 0.067 16.00 0.05\n0.070 0.079 16.34 0.05\n0.081 0.090 16.64 0.06\n0.093 0.101 16.92 0.07\n0.104 0.129 17.26 0.10\n0.132 0.182 17.68 0.13\n0.227 0.276 18.18 0.19\n0.282 0.332 18.32 0.24\n0.343 0.443 18.62 0.30\n\nIt shows clearly a decay -1.8 until 8 minutes after the trigger\nand then a decay -0.92 later. So we suspect a strong reverse shock\nduring the 8 first minutes.\n\nMagnitudes were estimated with the nearby NOMAD1 stars\nand are not corrected for galactic dust extinction.",
  "circularId": 22488,
  "createdOn": 1521050196000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 180314A: TAROT La Silla observatory optical observations",
  "submitter": "Alain Klotz at IRAP-CNRS-OMP  <Alain.Klotz@free.fr>",
  "eventId": "GRB 180314A"
}