{
  "bibcode": "2014GCN.15952....1K",
  "body": "A. Klotz, D. Turpin (IRAP-CNRS-OMP), D. Macpherson (UWA/ICRAR), D. \nCoward (UWA),\nM. Boer, B. Gendre, K. Siellez, H. Dereli, O. Bardho (UNS-CNRS-OCA),\nA. Williams (PO-UWA), R. Martin (PO-UWA)\nreport:\n\nWe imaged the field of GRB 140311A detected by SWIFT\n(trigger 591390) with the Zadko robotic telescope (D=100cm)\nlocated at the observatory - Gingin, Australia.\n\nThe observations started 119.5s after the GRB trigger\n(46.9s after the notice). The elevation of the field was at\n45 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).\nWe do not detect the OT discovered by Xu et al. GCNC 15947\nwith a limiting magnitude of:\n\nt0+119.5s to t0+179.5s : Rlim = 19.5\n\nThe second image is 30.0s exposure in tracking mode\nWe detect the OT discovered by Xu et al. GCNC 15947:\nt0+208s to t0+238s : R = 19.6 +/- 0.5\n\nFollow-up was performed until the dawn which arrived\n18 minutes after the trigger.\n\nWe co-added a series of exposures:\nt0+208s to t0+325s : R = 19.9 +/- 0.3\nt0+338s to t0+515s : R = 19.2 +/- 0.3\nt0+530s to t0+1111s : R = 18.5 +/- 0.3\n\nConclusions, the afterglow brightness increases\nslowly during the first 18 minutes after the trigger.\n\nMagnitudes were estimated with the nearby star\nNOMAD1 0906-0229793 (R=16.44) and are not corrected\nfor galactic dust extinction.",
  "circularId": 15952,
  "createdOn": 1394583054000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 140311A: Zadko observatory - Gingin optical observations",
  "submitter": "Alain Klotz at IRAP-CNRS-OMP  <Alain.Klotz@free.fr>",
  "eventId": "GRB 140311A"
}