TITLE: GCN CIRCULAR NUMBER: 17643 SUBJECT: GRB 150323B; Konkoly optical observations DATE: 15/03/25 20:49:43 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 24/03/2015 02:48 UT we observed the field GRB 150323B (J. R. Cummings GCN 17619 ). We imaged the X-ray positions published by P. D'Avanzo et al. GCN 17634. On the coadded R band images (total exposure = 1500 sec) we found marginal optical sources on the positions coincide with soure 1 and source 2. Source 1 /GCN 17634/ our work R mag.(Based on USNO-B1.0 stars) -------------------------------------------------------- RA: 17:21:48.83 RA: 17:21:48.62 20.8 +/-0.14 DEC: 38:19:04.6 DEC: 38:19:08.8 Source 2 /GCN 17634/ our work R mag.(Based on USNO-B1.0 stars) -------------------------------------------------------- RA: 17:21:50.35 RA: 17:21:50.47 19.9 +/-0.14 DEC: 38:16:58.5 DEC: 38:16:59.7 Due to the bad weather variability was not confirmed.