GCN Circular 4668
Martin Jelinek, D. Martinez, S. Guziy, S. Vitek and A. de Ugarte Postigo (IAA Granada, Spain) report: We imaged the error box of Swift GRB060204C (Grupe et al. GCN 4663) with the 1.5m telescope at Observatorio Sierra Nevada. We do not detect any new or variable source within the BAT error box down to the limiting magnitude I=21.0 at an image obtained 38minutes after the GRB. The image is calibrated against USNO-B1.0 I2 magnitude. Further observations are in progress. This message may be cited.