TITLE: GCN CIRCULAR NUMBER: 14890 SUBJECT: GRB 130612A: ISON-NM optical observations DATE: 13/06/12 21:13:30 GMT FROM: Alexei Pozanenko at IKI, Moscow L. Elenin (KIAM), A. Volnova (IKI), V. Savanevych (KNURE), A. Bryukhovetskiy (NSFCTC), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed of the field of the Swift GRB 130612A (Racusin et al., GCN 14874) with 0.45-m telescope of ISON-NM observatory starting on June, 12 (UT) 04:06:14. Series of 30 s exposures were obtained in clear filter. In the combined images we detected afterglow (Racusin et al., GCN 14874; Melandri et al., GCN14875) in coordinates (J2000) 17 19 10.63 +16 43 12.0. Preliminary photometry is based on the USNO-B1.0 1067-0299350 star assuming R=18.92. UT start, T0+ Filter Exposure, OT mid,d s 2013-06-12T04:06:14 0.0305 none 30*30 20.75 +/- 0.15 2013-06-12T04:29:28 0.0466 none 30*30 21.25 +/- 0.20