TITLE: GCN CIRCULAR NUMBER: 5653 SUBJECT: GRB060908: optical observations DATE: 06/09/29 14:58:49 GMT FROM: Alexei Pozanenko at IKI, Moscow M. Andreev, A. Sergeev (Terskol Branch of Institute of Astronomy), A. Kurenya (Baksan Neutrino Observatory), A. Pozanenko (IKI) on behalf of larger GRB follow up collaboration report: We observed the afterglow of GRB060908 (Evans et al., GCN 5544) with 2m telescope of Terskol Observatory on Sep. 08 (UT) 20:51:45 - 21:14:45. We detect the afterglow on a combined image of 20x60 s exposure. Based on USNO A2.0 field stars we estimate brightness of the optical transient: Mid time (UT), Exposure, R_mag Sep. 08.877 20x60 s 20.70 +/- 0.27 It should be noted that R magnitude of the star (USNO-B1.0 0903-0022606 R = 18.29) used in GCN 5552 (Wiersema et. al) is inconsistent with the R-magnitude of the same star USNO A2.0 (0900-00494220 R = 14.9). R-magnitudes of other field stars of the two catalogs USNO-B1.0 and USNO A2.0 are also inconsistent by ~2.9 mag in average. The message may be cited.