{
  "bibcode": "2006GCN..5919....1Y",
  "body": "F. Yuan (U Mich), B. E. Schaefer (Louisiana State), T. Guver (U \nIstanbul), D.A. Smith (Guilford) report on behalf of the ROTSE \ncollaboration:\n\nROTSE-IIIa, located at Siding Spring Observatory, Australia, responded \nto the possible burst GRB 061214 (Swift trigger 250908), producing \nimages beginning 7.0 s after the GCN notice time. An automated response \ntook the first image at 12:17:12.1 UT, 18.7 s after the burst, under \nfair conditions. We took 10 5-sec, 10 20-sec and 20 60-sec exposures. \nThese unfiltered images are calibrated relative to USNO A2.0 (R).\n\nComparison to the DSS (second epoch) reveals no new sources within the \n3-sigma error circle, for both single images and coadding into sets of \n10. Individual images have limiting magnitudes ranging from 14.9-16.8; \nwe set the following specific limits.\n\nstart UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd?\n--------------------------------------------------------------------\n12:17:12.1   12:19:32.0       139     17.1           18.7       Y\n12:19:40.7   12:24:31.2       290     17.5          167.3       Y",
  "circularId": 5919,
  "createdOn": 1166101625000,
  "email": "yuanfang@umich.edu",
  "subject": "GRB 061214(?): ROTSE-III Optical Limits",
  "submitter": "Fang Yuan at ROTSE  <yuanfang@umich.edu>",
  "eventId": "GRB 061214"
}