{
  "bibcode": "2006GCN..5190....1M",
  "body": "K. Masuno, Y. Urata, M. Tashiro, K. Abe, K. Onda, N. Kodaka (Saitama-U),\nF. Usui (ISAS/JAXA), M. Kuwahara (TUS/RIKEN), T. Tamagawa (RIKEN) report: \n\n\"We observed the error region of GRB 051028 (Hurley et al. GCN 4172)\nwith the very wide-field camera WIDGET located at Akeno, Japan. WIDGET\nmonitored the region with repeat of unfiltered 5-second exposures\nbetween 16.0 min and 11.2 min before the burst. We did not find any\noptical emission from the afterglow position (Jelinek et al. GCN\n4175). The 1-sigma limiting magnitude of each frame derived by the\nTycho-2 catalog was around V=10.3 magnitudes.\" \n\nThis message may be cited.",
  "circularId": 5190,
  "createdOn": 1149075671000,
  "email": "tamagawa@riken.jp",
  "subject": "GRB 051028 : WIDGET pre-trigger limit",
  "submitter": "Toru Tamagawa at RIKEN  <tamagawa@riken.jp>",
  "eventId": "GRB 051028"
}