{
  "bibcode": "2002GCN..1621....1M",
  "body": "G. Masi (Ceccano, Italy) reports:\n\nFollowing the afterglow detection of this GRB (D.W. Fox et al.: GCN 1564; M.\nUemura et al.: GCN 1566), A. Tasselli (Mahlow, Germany) imaged, on Masi's\nrequest, the field around the position given in GCN 1564. 36 CCD frames, each\nwith 45 seconds of integration, have been grabbed unfiltered with a 0.15m\ntelescope + CCD on Oct. 5.04375 UT, 2002,  and then coadded. The final image\nclearly shows an object in very good agreement with the cited astrometry.\n\nG. Masi performed the photometry of the source, using for calibration data from\nA. Henden (GCN 1583). The resulting magnitude is 18.5 CR. This value fits well\nwith the data plotted by N. Mirabal et al. (GCN 1602).\n\nThis message may be cited.",
  "circularId": 1621,
  "createdOn": 1034323478000,
  "email": "gianmasi@fr.flashnet.it",
  "subject": "GRB021004: optical observation",
  "submitter": "Gianluca Masi at Bellatrix Astronomical Obs  <gianmasi@fr.flashnet.it>",
  "eventId": "GRB 021004"
}