TITLE: GCN CIRCULAR NUMBER: 18327 SUBJECT: GRB 150910A: AAO optical observations DATE: 15/09/17 07:27:12 GMT FROM: Alexei Pozanenko at IKI, Moscow E. Mazaeva (IKI), R. Inasaridze (AAO), O. Kvaratskhelia(AAO), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 150910A (Pagani et al., GCN 18264) with AS-32 (0.7m) telescope of Abastumani Observatory starting on Sep. 11 (UT) 20:32:45. We obtained several unfiltered images. The afterglow (Pagani et al., GCN 18264; Zheng & Filippenko, GCN 18265) is clearly visible in a combined image. The photometry of the combined image is following Date UT start t-T0 Filter Exp. OT Err (mid, days) (s) 2015-09-11 20:32:45 1.46327 none 49*120 21.55 +/- 0.08 The photometry is based on SDSS stars used in GCN 18281 (Mazaeva et al.), R magnitude deduced from Lupton's transformations.