TITLE:   GCN CIRCULAR
NUMBER:  6812
SUBJECT: GRB 070920b: LCO optical observations
DATE:    07/09/21 13:40:32 GMT
FROM:    Edo Berger at Carnegie Obs  <eberger@ociw.edu>

E. Berger (Princeton,OCIW) and W. Krzeminski (LCO) report:

"We observed the BAT error circle of GRB 070920b (GCN 6808) with the Swope 
40-inch telescope at Las Campanas Observatory starting on 2007 Sep. 21.22 
UT (8.2 hours after the burst).  A total of 30 minutes were obtained in 
R-band in mediocre seeing conditions (~1.5").  A comparison to DSS reveals 
no new objects within the revised BAT error circle (GCN 6811)."