GRB060403: Search for an optical transient [Observed: 4 April 2006]
No optical counterpart for this gamma ray burst, down to mag 17.2, 14.9 hours after the event.

GRB041211: Search for an optical transient [Observation: 11 Dec 2004]
10 hours after the burst, no optical counterpart down to mag 17.8.

GRB 030913 []
Analysis of images of GRB 030913, with a negative result.