{
  "bibcode": "2001GCN..1114....1P",
  "body": "H.S. Park, G. Williams, S. Barthelmy, D. Hartmann, K. Hurley \nreport on behalf of the LOTIS collaboration:\n\nLOTIS observed the GRB 010921 optical afterglow area reported \nin GCNC #1107 on 09/21/2001 at 06:08:31 (52 min after the burst)\nduring a routine sky patrol. LOTIS uses 4 11 cm aperture\ntelephoto lenses to view an 8.8 x 8.8 deg field of view in\nthe R, V and clear bands. We searched for an optical counterpart \nin the region of GRB 010921 and we found no source. The 10 sigma \nlimits are:\n\n\tclear filter\t15.3 +/- 0.15\n\tV filter\t14.2 +/- 0.15\n\tR filter\tshutter failed to open\n\nFurther analys is in progress.\n\nThis message may be cited.",
  "circularId": 1114,
  "createdOn": 1003619754000,
  "email": "hpark@llnl.gov",
  "eventId": "GRB 010921",
  "subject": "GRB010921, optical observation at early time",
  "submitter": "Hye-Sook Park at LLNL  <hpark@llnl.gov>"
}