{
  "bibcode": "2011GCN.12499....1R",
  "body": "W. Rujopakarn (Steward), B. E. Schaefer (Louisiana State), T. Guver (U\nArizona), report on behalf of the ROTSE collaboration:\n\nROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB\n111029A (Swift trigger 506519; Troja, GCN 12498), producing images\nbeginning 7.7 s after the GCN notice time. An automated response took\nthe first image at 09:46:34.7 UT, 114.2 s after the burst, under\nexcellent conditions. We took 10 5-sec, 10 20-sec and 20 60-sec\nexposures. These unfiltered images are calibrated relative to USNO\nA2.0 (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\nsingle images and coadding into sets of 10; the field is not crowded.\nIndividual images have limiting magnitudes ranging from 16.9-17.6; we\nset the following specific limits.\n\nstart UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd?\n--------------------------------------------------------------------\n09:46:34.7   09:46:39.7         5     17.2          114.2       N\n09:46:34.7   09:48:21.8       107     18.0          114.2       Y",
  "circularId": 12499,
  "createdOn": 1319883094000,
  "email": "rujopakarn@gmail.com",
  "subject": "GRB 111029A: ROTSE-III Optical Limits",
  "submitter": "Wiphu Rujopakarn at U AZ/Steward  <rujopakarn@gmail.com>",
  "eventId": "GRB 111029A"
}