{
  "bibcode": "2009GCN.10150....1J",
  "body": "M. Jel����nek (IAA-CSIC), A. de Ugarte Postigo (INAF-OAB), R. Felletti, L.\nHanlon (UCD Dublin), H. Van Heerden (UOVS, Bloemfontein), P. Kub����nek\n(IPL UV, IAA-CSIC) reports on behalf of a large collaboration:\n\nWatcher telescope, located at Boyden Observatory, South Africa,\nobserved autonomously GRB 091109B (S. R. Oates et al., GCN 10148). We\nobtained a set of 5s exposures in clear filter, starting 78s after the\nGRB (65s after the notice). We see no new sources in the XRT error box\ndown to the single-image limiting magnitude of 16.5. Coaddition of\nfirst 120s (mean exposure time 153s after the GRB) of imaging data\nimproves this limit to ~17.7 calibrated against field USNO-A2.0 R-band\nstars. Those results are consistent with ROTSE-III non-detection\n(Schaefer et al. GCN 10149).\n\nWe note that there is a R~15.3 galaxy 8\" North-West of the XRT position,\nposibly the host of this short GRB.\n\nFurther observations are ongoing. This message can be quoted.",
  "circularId": 10150,
  "createdOn": 1257810427000,
  "email": "petr@lascaux.asu.cas.cz",
  "subject": "GRB 091109B: Optical limits from Watcher",
  "submitter": "Petr Kubanek at AIO  <petr@lascaux.asu.cas.cz>",
  "eventId": "GRB 091109B"
}