{
  "bibcode": "2002GCN..1615....1K",
  "body": "A. Klotz and M. Boer CESR/CNRS (Toulouse, France), and W. Thuillot\nIMCCE/BDL Paris, France report the following data on GRB 021004 obtained\nwith the 1.20 meter telescope at the OHP/CNRS (Observatoire de Haute\nProvence - France).\n\nImages were R-cousin filtered. Each measurement image results of\nco-addition of 4 frames of 40s (dark and flat corrected). Magnitudes are\ncomputed compared to the USNO star at 00:26:58.713 +18:56:56.61 (Fox et\nal. GCN 1564) assuming R=15.64.\n\nMagnitudes of GRB021004 : (R band) \n\n2002 oct. 04 22:04:44.5 UT (JD=2452552.41996) : 18.29\n2002 oct. 04 22:12:01.7 UT (JD=2452552.42502) : 18.37\n2002 oct. 04 22:20:32.3 UT (JD=2452552.43093) : 18.40\n2002 oct. 04 23:51:04.3 UT (JD=2452552.49380) : 18.67\n2002 oct. 04 23:57:13.2 UT (JD=2452552.49807) : 18.65\n\nDates are middle of exposures. This data fill nicely a gap around T0 +\n0.4 when the decay index of the light curve increases.",
  "circularId": 1615,
  "createdOn": 1034235146000,
  "email": "Michel.Boer@cesr.fr",
  "subject": "GRB 021004: Optical measurement at OHP",
  "submitter": "Michel Boer at CESR-CNRS  <Michel.Boer@cesr.fr>",
  "eventId": "GRB 021004"
}