TITLE: GCN CIRCULAR NUMBER: 23507 SUBJECT: GRB 181201A: continued optical observations in TSHAO DATE: 18/12/04 18:59:33 GMT FROM: Alexei Pozanenko at IKI, Moscow I. Reva (AFIF), M. Krugov (AFIF), A. Volnova (IKI), E. Mazaeva (IKI), S. Belkin (IKI), A. Pozanenko (IKI) report on behalf of IKI-FuN follow-up collaboration: We continue observations the optical afterglow (e.g. Podesta et al., GCN 23470; Kong GCN 23475) of INTEGRAL GRB 181201A (Mereghetti et al., GCN 23469) with Zeiss-1000 1-m telescope of Tien Shan Astronomical Observatory. Preliminary photometry of the afterglow in R-filter on December 04 is following Date UT start t-T0 Filter Exp. OT Err. (mid, days) (s) 2018-12-04 12:19:26 3.4202 R 2400 19.67 0.07 The photometry is based on the SDSS-DR12 star SDSS-DR12_id R(Lupton) J211710.81-123706.3 16.296