{
  "bibcode": "2005GCN..4386....1K",
  "body": "Klotz, A. (CESR-OMP), Boer M. (OHP), and Atteia, J.L. (LAT-OMP) report:\n\nWe imaged the entire field of GRB 051221B (173904) detected by SWIFT\n(Boyd et al. GCNC 4376) with the TAROT robotic telescope (D=25cm) located at\nthe Calern observatory, France. Observations started 9 seconds after the GCN\nnotice (and 216 sec. after the GRB). The field had an elevation of 35\ndegrees above horizon at the beginning of the observations and then\ndecreased. The humidity was rather high (90%), and haze appeared after few\nminutes of observation.\n\nWe compared the � 1.6 arcmin field centred on the XRT position (Fenimore et al.\nGCNC 4382) with stars of the USNO-B1 catalogue and with the DSS2-R atlas. We\ndid not find any new source. Following is the observation log and the upper\nlimits we derived:\n\n   Since-trig    Mag.\nstart      end\n+216s to +276s  R>14\n+282s to +312s  R>18.2\n+319s to +349s  R>18.2\n\nThis message may be cited.",
  "circularId": 4386,
  "createdOn": 1135253497000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 051221B: TAROT optical limits",
  "submitter": "Alain Klotz at CESR-CNRS  <Alain.Klotz@free.fr>",
  "eventId": "GRB 051221B"
}