TITLE: GCN CIRCULAR NUMBER: 17062 SUBJECT: GRB 141109A: AAO optical observations DATE: 14/11/12 19:34:55 GMT FROM: Alexei Pozanenko at IKI, Moscow E. Mazaeva (IKI), R. Inasaridze (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 141109A (D'Avanzo et al., GCN 17037) with AS-32 (0.7m) telescope of Abastumani Observatory. Observations were performed under mean seeing (FWHM) of 2.4". We obtained several unfiltered images on Nov. 10 starting on (UT) 01:05:04. At the position reported in (Covino, GCN 16932) we marginally detected (S/N =2) the afterglow of GRB 141109A (Covino, GCN 16932; Xu et al., GCN 17040; Graham et al., GCN 17041). Preliminary photometry is following: date UT start t-T0 Filter Exp. OT OT_err (mid, days) (s) 2014-11-10 01:05:04 0.836 clear 37*120 21.7 0.4 The photometry is based on several SDSS-DR9 stars R magnitudes transformed from SDSS-DR9 based on Lupton transformations: SDSS-DR9 R J093801.18-003731.5 17.6330 J093759.83-003741.8 17.2029 J093815.45-003332.9 18.2004