TITLE: GCN CIRCULAR NUMBER: 13185 SUBJECT: GRB 120326A: HCT optical observations DATE: 12/04/01 11:06:15 GMT FROM: D.K. Sahu at Indian Inst of Astrophysics,Bangalore D.K. Sahu, G.C. Anupama (Indian Institute of Astrophysics, Bangalore) and S.B. Pandey (ARIES, Nainital) report. The optical afterglow of GRB 120326A (Siegel et al., GCN 13105) was observed in Bessell R band, with the 2m. Himalayan Chandra Telescope of the Indian Astronomical Observatory, Hanle, India. Observations were made between 22:36 UT and 23:14 UT on 27/03/2012. The optical afterglow was detected in our individual frames of 300sec each. The preliminary R magnitudes of the optical afterglow calibrated using nearby USNO B1.0 stars is as under: ------------------------------------------------------------------ Date Mid UT Mid time from Exp. R Magnitude GRB(hrs) (sec) ------------------------------------------------------------------ 23-03-2012 22:55 45.5750 5x300 19.68 +/-0.07 -------------------------------------------------------------------