{
  "bibcode": "2012GCN.13319....1K",
  "body": "Klotz A. (IRAP-CNRS-OMP), Gendre B. (ASDC/INAF-OAR),\nBoer M. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report:\n\nWe imaged the field of GRB 120521C detected by SWIFT\n(trigger 522656) with the TAROT robotic telescope (D=25cm)\nlocated at the Calern observatory, France.\n\nThe observations started 23 min after the GRB trigger.\nThe elevation of the field decreased from\n68 degrees above horizon but humidity was higher\nthan 93% until 23 min after the trigger preventing\nthe record of the beginning of the event.\n\nWe co-added a series of exposures.\nNo OT was found in the XRT error box (Baumgartner\net al. GCNC 13318).\n\nstart   stop\n23min   37min   R > 19.4\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": 13319,
  "createdOn": 1337645885000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 120521C: TAROT Calern observatory optical observations",
  "submitter": "Alain Klotz at CESR-CNRS  <Alain.Klotz@free.fr>",
  "eventId": "GRB 120521C"
}