{
  "bibcode": "2010GCN.10917....1F",
  "body": "H. Flewelling (IfA/Hawaii), W. Zheng (U Mich), S. B. Pandey (U Mich), W.\nRujopakarn (Steward), report on behalf of the ROTSE collaboration:\n\nROTSE-IIIc, located at the H.E.S.S. site at Mt. Gamsberg, Namibia, responded\nto GRB 100702 (Swift trigger 426438; M. H. Siegel, GCN 10916), producing\nimages beginning 7.7 s after the GCN notice time. An automated response took\nthe first image at 01:04:06.7 UT, 19.5 s after the burst, under fair\nconditions. We took 10 5-sec, 10 20-sec and 40 60-sec exposures. These\nunfiltered images are calibrated relative to USNO A2.0 (R). Imaging is on\ngoing.\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; however, we are limited as the field is\nseverely crowded. Individual images have limiting magnitudes ranging from\n15.6-15.9; we set the following specific limits.\n\nstart UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd?\n--------------------------------------------------------------------\n01:04:06.7   01:05:22.8        76     16.1           19.5       Y\n\n01:20:08.4   01:24:48.5       280     16.2          981.2       Y",
  "circularId": 10917,
  "createdOn": 1278035053000,
  "email": "flewelling.heather@gmail.com",
  "subject": "GRB 100702: ROTSE-III Optical Limits",
  "submitter": "Heather Flewelling at IfA/Hawaii  <flewelling.heather@gmail.com>",
  "eventId": "GRB 100702"
}