TITLE: GCN GRB OBSERVATION REPORT NUMBER: 891 SUBJECT: GRB001109, optical observations DATE: 00/11/23 00:23:50 GMT FROM: Valery Petkov at Terskol Observatory V.Petkov, on behalf of the peak Terskol Observatory GRB followup team. We acquired on Nov 9.796 UT one R-band (300s exposure) image and one I-band (600s exposure) image of the GRB001109 error box (GCN #885) using the CCD camera of the 2m peak Terskol Observatory telescope. Photometric calibration of the images was done based on USNO-A2.0 magnitudes in the R-band and with selected areas SA 113 and SA 92 for the I band. A comparison with Nov 15.653 (1200s exposure) images reveals no fading object in the GRB error box down to R=19.6 and I=19.8.