TITLE: GCN CIRCULAR NUMBER: 17570 SUBJECT: GRB 150309A: AAO optic upper limit DATE: 15/03/12 18:16:20 GMT FROM: Alexei Pozanenko at IKI, Moscow E. Mazaeva (IKI), R. Inasaridze (AAO), Sh. Makandarashvili (AAO), A. Volnova (IKI), Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the Swift GRB 150309A (Cummings et al., GCN 17553) with AS-32 (0.7m) telescope of Abastumani Observatory starting on Mar. 10 (UT) 01:40:54. Within the enhanced XRT position (Osborne et al., GCN 17555) we do not detect any object. An upper limit is following Date UT start t-T0 Filter Exp. UL(3 sigma) (mid, days) (s) 2015-03-10 01:40:54 0.12699 None 19*120 21.2 The photometry is based on USNO-B1.0 star USNO-B1.0_id R2 1764-0030460 15.42