{
  "bibcode": "2012GCN.13887....1K",
  "body": "Klotz A. (IRAP-CNRS-OMP), Gendre B. (ASDC/INAF-OAR),\nBoer M. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report:\n\nWe imaged the field of GRB 121024A detected by SWIFT\n(trigger 536580) with the TAROT robotic telescope (D=25cm)\nlocated at the Calern observatory, France.\n\nThe observations started 45.0s after the GRB trigger\n(13.9s after the notice). The elevation of the field decreased from\n32 degrees above horizon and weather conditions\nwere 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).\n\nWe detect a new fading source in the error box given by SWIFT\nWe detected the candidate couterpart mentioned by Pagani et al. (GCNC 13886)\nat the following position (+/- 2 arcsec):\n\nRA(J2000.0) = 04h 41m 53.41s\nDEC(J2000.0) -12d 17' 26.9\"\n\nOT was R~13.3 betwenn 45.0s and 60s after GRB.\nThen the flux decreases.\n\nObservations are continuing.\n\nMagnitudes were estimated with the nearby NOMAD1 stars\nand are not corrected for galactic dust extinction.\n\nN.B. Galactic coordinates are lon=209.4933 lat=-34.2488\nand the galactic extinction in R band is about 0.1 magnitude\nestimated from D. Schlegel et al. 1998ApJ...500..525S.\n\nThis message may be cited.\n\n[GCN OPS NOTE(24oct12): Per author's request, the circular citation\nwas added and the uncertainty was increased from 1 to 2 arcsec.]",
  "circularId": 13887,
  "createdOn": 1351048853000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 121024A: TAROT Calern observatory optical detection of a bright counterpart",
  "submitter": "Alain Klotz at CESR-CNRS  <Alain.Klotz@free.fr>",
  "eventId": "GRB 121024A"
}