TITLE: GCN CIRCULAR NUMBER: 17644 SUBJECT: Subject: GRB 150323C; Konkoly optical observations DATE: 15/03/25 21:02:06 GMT FROM: Janos Kelemen at Konkoly Obs/Hungary J. Kelemen (kelemen at konkoly.hu) on behalf of the GRB OT observing program at the Konkoly Observatory. Starting on the night 23/03/2015 we observed the field GRB 150323C (A. Amaral-Rogers et al. GCN 17621 ). On the position reported by D. Xu et al. (GCN 17625) according our coadded R images we confirmed the presence of a marginal optical source in R band. Position from D. Xu our work --------------------------------------------------------------- RA(J2000) = 12:50:27.92 RA: 12:50:28.02 Dec(J2000) = +50:11:28.75 DEC: 50:11:28.3 Photometric results: (Based on nearby USNO-B1.0 stars) time from GRB. exp filter Mag. ------------------------------------------------ 10653 s. 1800 s R 21.7 +/-0.18 ------------------------------------------------