{
  "bibcode": "2006GCN..4737....1R",
  "body": "W. Rujopakarn (U Mich), E.S. Rykoff (U Mich), B. E. Schaefer (Louisiana \nState), F. Yuan (U Mich), S.A. Yost (U Mich), report on behalf of the \nROTSE collaboration:\n\nROTSE-IIIa, located at Siding Spring Observatory, Australia, responded \nto GRB 060211 (Hurkett et al., GCN 4736), producing images beginning \n6.2 s after the GCN notice time. An automated response took the first \nimage at 09:41:38.2 UT, 147.2 s after the burst, under twilight \nconditions. We took 10 5-sec, and 100 20-sec exposures. These \nunfiltered 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 14.0-16.2; \nwe set the following specific limits.\n\nstart UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd?\n--------------------------------------------------------------------\n09:41:38.2   09:41:43.2         5     14.3          147.2       N\n09:41:38.2   09:43:51.7       133     15.7          147.2       Y\n09:44:00.9   09:48:44.2       283     16.1          289.9       Y",
  "circularId": 4737,
  "createdOn": 1139654605000,
  "email": "wiphu@umich.edu",
  "subject": "GRB 060211: ROTSE-III Optical Limits",
  "submitter": "Wiphu Rujopakarn at U Michigan/ROTSE  <wiphu@umich.edu>",
  "eventId": "GRB 060211"
}