{
  "bibcode": "2009GCN.10075....1C",
  "body": "R. Chornock, W. Li, and A. V. Filippenko (UC Berkeley) report on behalf of the\nKAIT GRB team:\n\nThe Katzman Automatic Imaging Telescope (KAIT) at Lick Observatory automatically\nresponded to the Swift BAT trigger for GRB 091024 (Marshall et al., GCN 10062)\nwith a sequence of observations starting 82 s after the BAT trigger.  The\nafterglow is not initially detected.  Our first detection of the optical\nafterglow (Mundell et al., GCN 10063) is in a 20 s I band observation starting\nat 08:58:45 UT.  The KAIT position is\n\n(J2000) 22:36:59.64  +56:53:24.0\n\nwhich is consistent the positions reported by Mundell et al. (GCN 10063) and\nHenden et al. (GCN 10073).  The optical afterglow is thereafter detected in a\nsequence of V, I, and unfiltered images as it rose to a peak at an unfiltered\nmagnitude of 16.2 (preliminarily calibrated to USNO-B1) at t=404s and then\ndeclined to mag 17.0 at t=988s, similar to the behavior described by Cano et al.\n(GCN 10066).  After this time observations ceased due to a pointing limit.",
  "circularId": 10075,
  "createdOn": 1256439249000,
  "email": "chornock@astro.berkeley.edu",
  "subject": "GRB 091024: KAIT optical afterglow observations",
  "submitter": "Ryan Chornock at UC Berkeley  <chornock@astro.berkeley.edu>",
  "eventId": "GRB 091024"
}