{
  "bibcode": "2007GCN..6816....1K",
  "body": "Klotz, A. (CESR-OMP), Boer M. (OHP), Atteia J.L. (LATT-OMP) report:\n\nWe imaged the field of GRB 070920B detected by SWIFT\n(trigger 291728) with the TAROT robotic telescope (D=25cm)\nlocated at the European Southern Observatory,\nLa Silla observatory, Chile.\n\nThe observations started 2.7h after the GRB trigger\n(beginning of the night). The elevation of the field increased from\nfrom 27 degrees above horizon and weather conditions\nwere good but the moon (phase=0.58) was only at 68 degrees\nof the field, limiting the detectivity.\n\nWe co-added a series of 8 x 180s unfiltered exposures.\nWe do not detect any OT in the refined position\nprovided by Barthelmy et al. (GCNC 6811) nor the source\nreported by de Ugarte Postigo et al. (GCNC 6809):\n\nt0+2.7h to t0+3.6h : R > 18.2\n\nMagnitudes were estimated with the nearby USNO-B1 stars\nand are not corrected for galactic dust extinction\n(which is very low along the line of sight).\n\nThis message may be cited.",
  "circularId": 6816,
  "createdOn": 1190441372000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 070920B: TAROT La Silla observatory optical observations",
  "submitter": "Alain Klotz at CESR-CNRS  <Alain.Klotz@free.fr>",
  "eventId": "GRB 070920B"
}