TITLE: GCN CIRCULAR NUMBER: 7739 SUBJECT: GRB080430: optical observations DATE: 08/05/16 20:15:26 GMT FROM: Alexei Pozanenko at IKI, Moscow M. Andreev, A. Sergeev (Terskol Branch of Institute of Astronomy), Ju. Babina (CrAO), V. Petkov, A. Kurenya (BNO INR RAS), A. Pozanenko (IKI) on behalf of larger GRB follow up collaboration report: We observed the afterglow (Klotz et al. GCN 7646, Guidorzi et al. GCN 7647, Jelinek et al. GCN 7648) of GRB080430 (Guidorzi et al. GCN 7647) with Zeiss-600 of Mt.Terskol observatory on May. 01. The afterglow is detected in a combined image. A photometry of the OT against USNO-B1.0 stars is following: UT, Exposure, R_mag (mid time) May.01.8795 15x90s 20.9 +/-0.3 The message may be cited.