{
  "bibcode": "2001GCN..1000....1V",
  "body": "The optical counterpart of GRB010222 has been observed using the\nCFHT Multi Object Spectrograph in imaging mode at the Cassegrain\nfocus of the 3.6-m CFH Telescope on the night of Feb. 28 to March 1.\n\nTwo 10 mn images were obtained in much better conditions than\nthe night before (GCN #998) with a seeing of about 0.8\".  There are\nonly a few point like sources in the vicinity of the OT. A star like\nobject ~11\" S of the OT has been carefully measured with respect\nto the two stars used in GCN #998 and has a very consistent R\nmagnitude on the MOS exposures (R = 20.13 +/- 0.02). A fainter\nobject 8\" from the OT is used for internal consistency checks at\nR = 22.35.\n\nPrecise reduction of the images from Feb. 28 and March 1 gives the\nfollowing results:\n\nFeb. 28.653 UTC   R = 22.73 +/- 0.10\nMar. 01.628 UTC   R = 22.96 +/- 0.10\n\nThe index of the power law decay given in GCN #998 is not \nsignificantly modified and found as 1.25 +/- 0.06.\n\nThere is not structure found on the OT, which is still seen as a \npoint source on the March 1 combined image.\n\nMore information (with the new images of the OT) can be found at\nhttp://www.cfht.hawaii.edu/~veillet/grb.html\n\nM. Pakull, L. Mirioni, and J. McDonald are acknowledged for their\nhelp  in this observation.\n\nThis message may be cited.\n-- \n************************************************************\nDr. Christian Veillet,       CFHT Senior Resident Astronomer\nPhone: (808) 885-3161   http://www.cfht.hawaii.edu/~veillet/\n************************************************************",
  "circularId": 1000,
  "createdOn": 983499363000,
  "email": "veillet@cfht.hawaii.edu",
  "subject": "GRB010222 - Optical observation",
  "submitter": "Christian Veillet at CFHT  <veillet@cfht.hawaii.edu>",
  "eventId": "GRB 010222"
}