{
  "bibcode": "2001GCN...990....1O",
  "body": "A. Oksanen, M. Moilanen, H. Hyvonen, R. Pasanen, and\nP. Tikkanen of the Nyrola Observatory GRB team and\nthe AAVSO International GRB network, report:\n\nWe observed the optical transient for GRB010222 (GCN 961) with\nthe 0.4m telescope and ST7E CCD camera of the Nyrola\nObservatory on the night of 010222/010223 UT. Observing conditions \nwere quite good: sky was clear, but strong wind enlarged the star\nimages. Our preliminary untransformed BVR measures of the OT (GCN 961)\nfrom that night, using Henden star A (GCN 967) as calibrated by \nHenden (GCN 987) for the comparison star, are as follows:\n\nUT (mid)        mag   merr  filter exposure(s)\n----------------------------------------------\n20010222.8227  19.84  0.31   B     12x300\n20010222.8744  19.57  0.13   Rc    12x300\n20010222.9187  19.70  0.13   V     12x300\n20010222.9661  19.69  0.15   Rc    12x300\n20010223.0134  19.92  0.14   V     12x300\n20010223.0628  19.92  0.17   Rc    12x300\n20010223.1439  20.29  0.21   V      6x300\n20010223.1665  20.11  0.31   Rc     6x300\n\nThe images are available on http://nyrola.jklsirius.fi/grb/grb010222/. \n\nWe want to thank A. Henden (USRA/USNO) about preparing this circular.\n\nThis message can be cited.",
  "circularId": 990,
  "createdOn": 983132075000,
  "email": "arto.oksanen@tietoenator.com",
  "subject": "GRB010222 Optical observations",
  "submitter": "Arto Oksanen at Nyrola Obs., Finland  <arto.oksanen@tietoenator.com>",
  "eventId": "GRB 010222"
}