{
  "bibcode": "2009GCN.10183....1B",
  "body": "E. Berger (Harvard) and I. Momcheva (OCIW) report:\n\n\"We obtained a second set of optical r-band observations of the BAT \nerror circle of GRB 091117 (GCN #10171) with IMACS on the Magellan/Baade \n6.5-m telescope starting on 2009 Nov 20.03 UT.  A comparison to our \nfirst epoch of Magellan observations (GCN #10174) reveals no variable \nsources within the BAT error circle or in coincidence with the two XRT \nsources (GCNs #10173,10177,10181) to a limit of r~24 mag.  The point \nsource identified as an HII region (GCN #10176) has not varied in \nbrightness.  Further analysis is in progress.\"",
  "circularId": 10183,
  "createdOn": 1258696805000,
  "email": "eberger@cfa.harvard.edu",
  "subject": "GRB 091117:  2nd epoch of Magellan optical observations",
  "submitter": "Edo Berger at Harvard  <eberger@cfa.harvard.edu>",
  "eventId": "GRB 091117"
}