{
  "bibcode": "2005GCN..3022....1Y",
  "body": "S.A. Yost, D.A. Smith, and E.S. Rykoff report on behalf of the ROTSE\ncollaboration:\n\nROTSE3B, located at McDonald Observatory, Texas, responded to GRB050215B\n(Swift#0106107) under fair conditions (low elevation). An automatic\nresponse (interrupting the sequence for 050215A) resulted in a sequence of\n60+ images beginning 8 sec after the trigger. The first image was taken at\n02:35:19.0, 97 sec after the burst. We took 10 5 sec, 10 20 sec, and 40+\n60 sec exposures. The images are unfiltered and were calibrated relative\nto USNO A2.0.\n\nIndividual images have limiting magnitudes from 16-17.7 mag. Comparison to\nthe DSS reveals no new sources within the 3-sigma error circle to a\nlimiting magnitude of 17.8-18.8 for coadded sets of 10 images between 100\nsec and 50 min post-burst\n\nThis message may be cited",
  "circularId": 3022,
  "createdOn": 1108440092000,
  "email": "sayost@umich.edu",
  "subject": "GRB050215B: ROTSE-III optical observations",
  "submitter": "Sarah Yost at U.Michigan  <sayost@umich.edu>",
  "eventId": "GRB 050215B"
}