{
  "bibcode": "2005GCN..3245....1T",
  "body": "K. Torii (Osaka U.) reports\n\n \"The error region of GRB 050412 (Cummings, et al. GCN 3237) was\nobserved with the 0.3-m telescope in the New Mexico Skies observatory.\nImaging through clear filter started at 05:48:13 UT (250-s after trigger) \nand 10 frames of 120-s exposure were obtained.\n\n We do not find an optical counterpart to the X-ray source\n(Tamburelli, et al. GCN 3241) and derive its 3-sigma upper limit\nrelative to USNO-A2.0 (R) mag as follows.\n\nMeanEpoch Magnitude Exposure\n05:49:13 >18.9 120s\n06:00:31 >20.5 10x120s\n\"",
  "circularId": 3245,
  "createdOn": 1113311874000,
  "email": "torii@crab.riken.go.jp",
  "subject": "GRB 050412: Optical limit",
  "submitter": "Ken ichi Torii at RIKEN  <torii@crab.riken.go.jp>",
  "eventId": "GRB 050412"
}