{
  "bibcode": "2006GCN..4480....1Y",
  "body": "F. Yuan (U Mich), W. Rujopakarn (U Mich), E.S. Rykoff (U Mich), S.A. \nYost (U Mich), report on behalf of the ROTSE collaboration:\n\nROTSE-IIId, located at the Turkish National Observatory at Bakirlitepe, \nTurkey, responded to GRB 060111 (Swift trigger 176818), producing images \nbeginning 5 s after the GCN notice time. An automated response took the \nfirst image at 04:23:23.2 UT, 17.1 s after the burst, under twilight \nconditions. We took 10 5-sec eposures before the individual images were \nsaturated due to twilight. These unfiltered images are calibrated \nrelative to USNO A2.0 (R).\n\nComparison to the DSS (second epoch) reveals no new sources within the \n3-sigma error circle and particularly at the XRT position, for both \nsingle images and coadding into sets of 10. Individual images have \nlimiting magnitudes ranging from 13.4-13.8; we set the following \nspecific limits.\n\nstart UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd?\n--------------------------------------------------------------------\n04:23:23.2   04:23:28.2         5     13.4           17.1       N\n04:23:23.2   04:25:31.0     127.8     14.5           17.1       Y",
  "circularId": 4480,
  "createdOn": 1136956363000,
  "email": "yuanfang@umich.edu",
  "subject": "GRB 060111: ROTSE-III Optical Limits",
  "submitter": "Fang Yuan at ROTSE  <yuanfang@umich.edu>",
  "eventId": "GRB 060111"
}