{
  "bibcode": "2007GCN..7122....1R",
  "body": "E.S. Rykoff (UCSB), W. Rujopakarn (Steward), B. E. Schaefer (Louisiana \nState), T.A. McKay (U Mich), H. Swan (U Mich), report on behalf of the \nROTSE collaboration:\n\nROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB \n071122 (Swift trigger 297114; Stamatikos et al., GCN 7121), producing \nimages beginning 8.5 s after the GCN notice time. An automated response \ntook the first image at 01:24:51.5 UT, 85.9 s after the burst, under \nfair conditions. These observations were affected by proximity to the \nfull moon. We took 10 5-sec, and 30 20-sec exposures. These unfiltered \nimages are calibrated relative to USNO A2.0 (R). Imaging is on going.\n\nComparison to the DSS (second epoch) reveals no new sources within the \n3-sigma Swift/BAT error circle or the XRT error circle, for both single \nimages and coadding into sets of 10. Individual images have limiting \nmagnitudes ranging from 15.7-16.8; we set the following specific limits.\n\nstart UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd?\n--------------------------------------------------------------------\n01:24:51.5   01:24:56.5         5     15.8           85.9       N\n01:24:51.4   01:25:58.5        67     17.3           85.8       Y\n01:26:12.0   01:30:54.8       282     17.8          166.4       Y",
  "circularId": 7122,
  "createdOn": 1195696831000,
  "email": "erykoff@physics.ucsb.edu",
  "subject": "GRB 071122: ROTSE-III Optical Limits",
  "submitter": "Eli Rykoff at UCSB  <erykoff@physics.ucsb.edu>",
  "eventId": "GRB 071122"
}