{
  "bibcode": "2006GCN..5608....1U",
  "body": "T.Uehara, I.Takahashi, K.Yoshida, A.Kobayashi,\nD.Oyamada, Y.E.Nakagawa, S.Sugita, K.Yamaoka,\nA.Yoshida (AGU) report:\n\nWe have observed the feild of GRB060923C (Stamatikos et al. GCN 5591)\nfrom 13:35:46 (UT) with 0.3m  AROMA robotic telescope with R-band filter\nat Aoyama Gakuin University.\n\nAlthough the weather condition was not good, we have taken 60 frames of\nimage with 20s exposure each.   The photometric calibration was made\nby first 5 and every 20 frames by comparing with USNO A2.0 stars\nin the same field.  No new source was found. The 3 sigma\nlimiting magnitude of each combined image is as below.\n\n\nnumber       mean           time since     limiting magnitude\nof frames    time (UT)      GRB (s)        in R (3 sigma)\n========================================================================\n5            13:36:39          217                 15.4\n20           13:40:20          436                 15.8\n20           13:54:06          1264                16.8\n20           14:10:26          2244                17.5",
  "circularId": 5608,
  "createdOn": 1159188325000,
  "email": "grbalert-ylab@phys.aoyama.ac.jp",
  "subject": "GRB060923C: AROMA optical obsevation",
  "submitter": "Atsumasa Yoshida at Aoyama Gakuin U  <grbalert-ylab@phys.aoyama.ac.jp>",
  "eventId": "GRB 060923C"
}