{
  "bibcode": "2006GCN..5981....1K",
  "body": "Klotz, A. (CESR-OMP), Boer M. (OHP), Atteia J.L. (LATT-OMP) report:\n\nWe solve technichal problems that prevent to\nacces to the first trailed image of GRB 061222B\nobtained with TAROT located at the European Southern\nObservatory, La Silla observatory, Chile.\n\nThe observations started 84.1s after the GRB trigger\n(4s after the notice). The trailed image allows to\nfollow continuously variable source during the 60s\nintegration time (see technichal description in\nKlotz et al., 2006, A&A 451, L39). The GRB expected\ntrail is blended with the trail of the USNO-B1 star\n0641-0103259 of R=14.7 after 24s. During the 24 first\nseconds we do not detect the optical transient brighter\nthan R~17.7. Moreover, we confirm the optical detection\nin the first non trailed image (Klotz et al. GCN Circ.\n5960) taken in the range t0+150 to t0+180s.\nTo summarize:\n\nt0+ 84s to t0+108s : R > 17.7\nt0+108s to t0+144s : R > 14.7\nt0+150s to t0+180s : R = 18.2 +/- 0.5 (GCNC 5960)\nt0+185s to t0+215s : R > 18.2\nt0+150s to t0+534s : R = 19.9 (GCNC 5959)\n\nMagnitudes were estimated with the nearby USNO-B1 stars\nand are not corrected for galactic dust extinction.\n\nThis message may be cited.",
  "circularId": 5981,
  "createdOn": 1167011281000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 061222B: TAROT La Silla observatory early optical observations",
  "submitter": "Alain Klotz at CESR-CNRS  <Alain.Klotz@free.fr>",
  "eventId": "GRB 061222B"
}