TITLE: GCN CIRCULAR NUMBER: 11324 SUBJECT: GRB 101008A: SAO RAS optical observations DATE: 10/10/09 01:56:35 GMT FROM: Vladimir Sokolov at SAO RAS A. S. Moskvitin, T. A. Fatkhullin, A. V. Zyazeva report on behalf of a larger collaboration: We have observed the field of the GRB 101008A (Baumgartner et al., GCN#11318, GCN#11319; Beardmore et al., GCN#11321) with the 1m telescope Zeiss-1000 of SAO RAS, Russia. The observations were carried out in Rc band on October, 8.763 -- 8.800 UT (1.581 -- 2.484 hours after the trigger). We have detected three possible candidates of the OT near the enhanced XRT error box, which are absent in the DSS R-band image. A comparison of the DSS and our images is demonstrated at ftp://ftp.sao.ru/pub/grb/GRB101008A/GRB101008A.jpeg We have measured the R magnitudes of these three objects according to R2 = 16.33 of the USNO-B1.0 star 1270-0570798: S1 R = 20.84 +/- 0.04 S2 R = 21.03 +/- 0.06 S3 R = 21.01 +/- 0.05 All the errors are formal and they do not include the errors of the USNO-B1.0 to Johnson-Cousins photometric system transformation. This message may be cited.