TITLE: GCN CIRCULAR NUMBER: 22923 SUBJECT: GRB 180706A: TSHAO optical observations DATE: 18/07/06 21:15:30 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (IKI), I. Reva (FAPHI), E. Mazaeva (IKI), A. Pozanenko (IKI), A. Kusakin (FAPHI), M. Krugov (FAPHI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 180706A (Stamatikos et al., GCN 22909) with Zeiss-1000 telescope of Tien Shan Astronomical Observatory starting on July 06 (UT) 16:18:35. We obtained several images in R-filter. The optical afterglow (Stamatikos et al., GCN 22909; Watson et al., GCN 22910) is clearly detected in a combined image. Preliminary photometry of the afterglow is following. Date UT start t-T0 Filter Exp. OT Err. UL (mid, days) (s) 2018-07-06 16:18:35 0.35345 R 29*120 20.65 0.09 22.2 The photometry is based on several SDSS-DR12 stars. Ref.stars SDSS-DR12_id R(Lupton) J120642.39+660133.6 18.5600.025 J120649.22+660218.2 17.5190.018 J120653.24+660249.5 17.9870.017