{
  "bibcode": "2003GCN..2497....1K",
  "body": "G. Kosugi, Y. Ohyama, T. Yamada, K. Sekiguchi, T. Sasaki, M. Akiyama,\nand N. Kawai report on behalf of the Subaru GRB team:\n\n\"We have observed the field covering most of the SXC error box of \nGRB 031220 (=H2976) in I band with FOCAS on the Subaru 8.2m telescope\non Mauna Kea beginning at 11:20 UT on Dec 20, approximately 8 hours after\nthe burst.  The field was covered with 5 pointings of 10 min exposure,\nwith average seeing of 0.9 arcseconds.\n\nVisual comparison with DSS-2 images revealed no obvious counterpart\ncandidates.\"",
  "circularId": 2497,
  "createdOn": 1071979738000,
  "email": "nkawai@hp.phys.titech.ac.jp",
  "subject": "GRB 031220: Subaru observation",
  "submitter": "Nobuyuki Kawai at Tokyo Tech  <nkawai@hp.phys.titech.ac.jp>",
  "eventId": "GRB 031220"
}