{
  "bibcode": "2007GCN..7035....1K",
  "body": "Klotz, A. (CESR-OMP), Boer M. (OHP), Atteia J.L. (LATT-OMP) report:\n\nWe imaged the field of GRB 071101 detected by SWIFT\n(trigger 295779) with the TAROT robotic telescope (D=25cm)\nlocated at the Calern observatory, France.\n\nThe observations started 39.4s after the GRB trigger\n(7.1s after the notice). The elevation of the field increased from\nfrom 36 degrees above horizon and weather conditions\nwere good. Images were acquired with no filter.\n\nThe date of trigger : t0 = 2007-11-01T17:53:46.752\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 any OT at the XRT location defined\nby Pagani et al. GCN Circ. 7034) with a limiting magnitude of:\nt0+39.4s to t0+99.4s : R > 16.3\n\nThe second image is 30.0s exposure in tracking mode:\nt0+106.4s to t0+136.4s : R > 17.5\n\nWe co-added a series of exposures:\nt0+106.4s to t0+393.6s : R > 18.4\n\nMagnitudes were estimated with the nearby USNO-B1 stars\nand are not corrected for galactic dust extinction.\n\nN.B. Galactic coordinates are lon=138.4726 lat= +3.9459\nand the galactic extinction in R band is about 4.0 magnitudes\nestimated from D. Schlegel et al. 1998ApJ...500..525S.\n\nThis message may be cited.",
  "circularId": 7035,
  "createdOn": 1193988426000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 071101: TAROT Calern observatory optical observations",
  "submitter": "Alain Klotz at CESR-CNRS  <Alain.Klotz@free.fr>",
  "eventId": "GRB 071101"
}