TITLE: GCN CIRCULAR NUMBER: 17642 SUBJECT: Subject: GRB 150323A; Konkoly optical observations DATE: 15/03/25 20:36:46 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 evening 23/03/2015 18:30 UT we observed the field GRB 150323A (A. Amaral-Rogers et al. GCN 17611, and M.R. Goad et al. GCN 17615). We can confirm the presence of the supposed afterglow reported by S. B. Cenko (NASA/GSFC) and D. A. Perley (Caltech) (GCN 17612) at the position RA: 08:32:42.69 DEC: 45:27:53.6 Our position and the P60 position are the same within 1 pixel. On the coadded images (total exposure time = 2400 sec) we measured an R -band magnitude of m(R) = 20.3 +/- 0.14 with respect to nearby USNO-B1.0 stars. time from GRB. exp filter Mag. ------------------------------------------------ 56136 s. 2400 s R 20.3 +/-0.14 ------------------------------------------------