{
  "bibcode": "2005GCN..3978....1Y",
  "body": "S.A. Yost, E.S. Rykoff (U Mich), B. Schaefer (Louisiana State), D.A. \nSmith (Guilford), T. Guver (U. Istanbul) report on behalf of the ROTSE \ncollaboration:\n\nROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB \n050915 (Swift trigger 155242), producing images beginning 7.5 s after \nthe GCN notice time. An automated response took the first image at \n11:23:10.5 UT, 28.2 s after the burst, under fair conditions. We took \n10 5-sec, 10 20-sec and 20 60-sec eposures. These unfiltered images are \ncalibrated relative to USNO A2.0 (R). With the arrival of morning \ntwilight, few further images are expected.\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 16.0-17.4; \nwe set the following specific limits.\n\nstart UT \t\tend UT \tt_exp(s) \tmlim \tt_start-tGRB(s) Coadd?\n--------------------------------------------------------------------\n11:23:10.5 \t11:24:32.5 \t82 \t17.4 \t\t28.2\t\t Y\n11:24:33.4 \t11:29:34.4 \t301 \t18.0 \t\t111.1 \t Y",
  "circularId": 3978,
  "createdOn": 1126786188000,
  "email": "sayost@umich.edu",
  "subject": "GRB 050915: ROTSE-III optical limits",
  "submitter": "Sarah Yost at U.Michigan  <sayost@umich.edu>",
  "eventId": "GRB 050915"
}