{
  "bibcode": "2009GCN..9956....1K",
  "body": "A. Klotz, T.P. Vaalsta, Liang Yan, and J. Zadko\nreport on behalf of the Zadko Telescope Team.\n\nA. Klotz (CESR, OHP), T.P. Vaalsta, Liang Yan, J. Zadko,\nH. Miao, J. Moore, K. Frost, D. Coward, A. Imerito,\nD. Blair, R. Burman, P. Luckas, S. Gordon, A. Fletcher,\nA. Ahmet, (University of Western Australia)\nM. Todd, M. Zadnik (Curtin University)\nM. Boer, M. Laas (OHP), P. Thierry (Airbus)\n\nThe 1.0m F/4 Zadko telescope started imaging\nthe field of GRB 090927 (trigger=370846, Grupe\net al., GCN 9945) 110 minutes after the Swift\ntrigger. A fading source was found within the\nXRT error circle (GCN 9946, Gronwall et al.).\nThe field was observed for 50 minutes using a\npreliminary version of a robotic observation\nmode.\n\nPreliminary photometry of unfiltered images\ntaken with an iKon DW436BV camera show the\nfollowing initial magnitudes of the optical\nafterglow:\n\ntmid(min) Exp. Time  R Magnitude\n-------------------------------------\n110           42s    >16\n126          540s     19.8 +/- 0.5\n158          360s     20.0 +/- 0.5\n\nThe fading seems to have low decay\nwhich is encouraging to perform\nspectrocopy in the next hours.",
  "circularId": 9956,
  "createdOn": 1254083345000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 090927: Zadko Telescope observations",
  "submitter": "Alain Klotz at CESR-CNRS  <Alain.Klotz@free.fr>",
  "eventId": "GRB 090927"
}