{
  "bibcode": "2002GCN..1717....1F",
  "body": "T.A. Fatkhullin, V.N. Komarova, A.V. Moiseev (SAO RAS) report for the\nlarger GOSH collaboration:\n\n\nThe field of the GRB 021004 optical transient was observed with the SCORPIO\ninstrument at the 6-m telescope of SAO RAS. The images were taken\nstarting from 15:30 to 17:45 UT on Nov 29 and from 18.55 to 20.00 UT on Nov 30\nunder conditions of thin cirrus with seeing of about 1.2 arcsec in the first\nnight and 1.5 arcsec in the second one. The V, Rc and Ic filters were used.\nThe absolute astrometry was done relatively to USNO-B1.0 stars with internal\nerror of 0.3 arcsec. We detect an object which coincides with the position\nof the optical transient (Henden et al. GCN #1592)  within the astrometric\nerror. Photometric calibration was performed using 6 standards\n(Henden et al. GCN #1630) in our FOV.\nThe results of the photometry are given below:\n\n Data    Filter  Exp.       OT mag.     Aperture\n------------------------------------------\n 29 Nov   Rc   15x180s   24.36+/-0.18   3.5 arcsec\n 29 Nov    V    5x450s   24.53+/-0.18   3.5 arcsec\n 30 Nov   Ic   14x120s   >23.9\n------------------------------------------\n\nAt this stage it is not clearly whether the object is the pure host\ngalaxy. Further observations are planned.\nImages can be seen at URL:\nhttp://www.sao.ru/~sokolov/GRB/FOLLOWUP/GRB021004/GRB021004.html\n\nThis message may be cited.",
  "circularId": 1717,
  "createdOn": 1038847919000,
  "email": "sokolov@sao.ru",
  "subject": "GRB021004, late time optical observations",
  "submitter": "Vladimir Sokolov at SAO RAS  <sokolov@sao.ru>",
  "eventId": "GRB 021004"
}