TITLE: GCN CIRCULAR NUMBER: 19646 SUBJECT: GRB 160629A: AbAO optical observations DATE: 16/07/03 15:12:57 GMT FROM: Alexei Pozanenko at IKI, Moscow E. Mazaeva (IKI), A. Pozanenko (IKI), A. Volnova (IKI), R. Inasaridze (AbAO), V. Ayvazian (AbAO), V. Zhuzhunadze, (AbAO), O.Kvaratskhelia (AbAO), G. Inasaridze (AbAO), I. Molotov (KIAM), report on behalf of larger GRB follow-up collaboration: We observed the field of the INTEGRAL GRB 160629A (Gotz et al., GCN 19621) with AS-32 (0.7m) telescope of Abastumani Observatory on June, 01 (UT) 19:07:28. We obtained several unfiltered images of the field. Within XRT error circle (D'Ai et al., GCN 19641) we detected optical afterglow (Klotz et al., GCN 19622; Sokolov et al., GCN 19623) on July 1, and obtained upper limit on June 30. Preliminary photometry of the optical afterglow is following Date UT start t-T0 Filter Exp. OT UpLim (3 sigma) (mid, days) (s) 2016-06-30 18:23:01 0.86572 CR 37*60 n/d 21.4 2016-07-01 19:34:47 1.93748 CR 36*120 22.2+/-0.2 23.0 Photometry is based on nearby USNO-B1.0 stars USNO-B.1_id R2 1669-0002297 15.53 1669-0002325 15.34 1669-0002281 15.48 1669-0002346 16.43 1669-0002192 15.78