{
  "bibcode": "2003GCN..1845....1I",
  "body": "M. Ishiguro (ISAS)\nT. Soyano, H. Mito and  Y. Urata on behalf of the Kiso GRB team:\n\n\" We have observed the entire INTEGRAL error circle of GRB030131 (Gotz\net al., GCN1838) with Kiso observatory 1.05 m Schmidt telescope. We\nobtained two R-band data sets (300 sec x 3 frames), starting at 15:36\nUT and 18:45 UT.\n\n Our data;\n Date  Time (UT)   Exposure  Limiting mag.(R, SN=3)\n 01-31 15:36:47    300s x 3  19.7\n 01-31 18:45:00    300s x 3  20.0\n\n# Limiting magnitude was estimated by comparison with\n# U1200_07092706 13:27:46.834 +30:44:13.42 16.4 mag.\n\nComparison with DSS II red images, no new object was detected down to\nthe limiting magnitude. We also could not identify any variable\nobjects in the region reported by Hurley et al (GCN1841) using a PSF\nmatched image subtraction method.\"\n\nThis message may be cited.",
  "circularId": 1845,
  "createdOn": 1044180332000,
  "email": "urata@crab.riken.go.jp",
  "subject": "GRB030131: Kiso Observations",
  "submitter": "Yuji Urata at RIKEN  <urata@crab.riken.go.jp>",
  "eventId": "GRB 030131"
}