{
  "bibcode": "2002GCN..1286....1H",
  "body": "A. Henden and P. Nelson (Ellinbank Observatory, Australia)\non behalf of the AAVSO International GRB Network, report:\n\nThe Ellinbank 320mm f/5 Newtonian with an ST-8E CCD were used on 020321 UT\nto image the BeppoSAX WFC error circle for GRB020321\n(Gandolfi, GCN 1281; Guidorzi et al., GCN 1284).\nA total of 30 x 30 sec images in Rc were taken from 12:22 to 12:47 UT\n(8.2hrs after the burst), covering a 20x30 arcmin field that\nincludes the entire BeppoSAX error circle.\n\nThe ESO R and AAO R plate scans from the USNO PMM pixel database\nwere used to blink the resultant coadded image.  The limiting\nmagnitude is estimated to be Rc=19.  Two faint objects, near the\nlimiting magnitude, do not appear on the ESO or AAO plates, and\nare not included in the minor planet database.  These two objects\nare at:\n    16:11:30.00  -83:39:12.1  J2000\n    16:12:52.00  -83:40:13.9\n\nwith position errors of about 0.5arcsec.  These may be artifacts\nof the processing, but are the only objects inside of the WFC error\ncircle that do not also appear on the photographic plates.  In particular,\nwe find nothing new at our limiting magnitude inside the recent\nNFI error circle (Gandolfi, GCN 1285).\n\nThe AAVSO would like to thank the Curry Foundation for supporting the\nAAVSO International GRB Network.",
  "circularId": 1286,
  "createdOn": 1016734692000,
  "email": "aah@nofs.navy.mil",
  "subject": "GRB020321 optical observations",
  "submitter": "Arne A. Henden at USNO/USRA  <aah@nofs.navy.mil>",
  "eventId": "GRB 020321"
}