{
  "bibcode": "2004GCN..2912....1R",
  "body": "E. Rykoff, T. McKay, H. Swan (U. Michigan) report on behalf of the ROTSE \ncollaboration:\n\nROTSE-IIIc, located at the H.E.S.S. sit at Mt. Gamsberg, Namibia, \nresponded to Swift GRB041224 (GCN#2908).  A manual response was \ninitiated at 23:20:41 UT, 3 hours after the burst.  We took 10 5-s \nexposures followed by 250 20-s exposures.  All the images were taken \nwith >95% moon illumination.  The unfiltered images were calibrated \nrelative to USNO A2.0.  Individual images have limiting magnitudes \naround 17.2.  Comparison to DSS (second epoch) reveals no new sources \nwithin the 3-sigma error circle to a limiting magnitude of 18.5 for \nstacks of 10 images taken during the first hour of observation.",
  "circularId": 2912,
  "createdOn": 1103945563000,
  "email": "erykoff@umich.edu",
  "subject": "GRB041224: ROTSE-III Optical Observations",
  "submitter": "Eli Rykoff at Univ. of Michigan/ROTSE  <erykoff@umich.edu>",
  "eventId": "GRB 041224"
}