TITLE: GCN CIRCULAR NUMBER: 6910 SUBJECT: GRB071013: optical limit DATE: 07/10/13 16:47:58 GMT FROM: Alexei Pozanenko at IKI, Moscow E. Klunko(ISTP), A. Marchenkov (ISTP), A. Pozanenko (IKI) on behalf of larger GRB follow up collaboration report: We observed the error box of GRB071013 (Marshall et al., GCN 6907) in R-band on Oct.13 with 1.5m telescope of Sayan observatory. A set of images of 120 s exposure was obtained starting (UT) 13:20:27. No obvious optical candidate is found within BAT error circle in the first image (UT) 13:20:27 in comparison with DSS2. Based on USNO A2.0 we estimate limiting magnitude of the first image as R=19.2. The message may be cited.