TITLE: GCN CIRCULAR NUMBER: 13097 SUBJECT: GRB 120324A: CQUEAN rizY Observation DATE: 12/03/24 15:47:25 GMT FROM: Myungshin Im at Seoul Nat U Myungshin Im, Jae-Woo Kim, and Duho Kim (CEOU/Seoul National Univ.) We observed GRB 120324A (Zhang et al., GCN 13090) in r,i,z,Y filters using CQUEAN camera on the 2.1m Otto-Struve telescope at McDonald Observatory, Texas, US. The observation started at 2012-03-24 10:31:44 UT, or about 4.5 hours after the BAT alert. We find a faint object in i,z,Y images at the edge of the error circle of the enhanced XRT position (Evans et al. GCN 13093). The coordinate of the object is RA=19:24:18.78, Dec=24:07:47.3 (J2000) with an error of 0.7". Due to high stellar density in this field, it is not clear if this object is the optical counterpart of the GRB Further observations are planned to check the variability of this source. The finding chart of the object is available at http://astro.snu.ac.kr/~mim/grb120324a/grb120324a_cquean_i.gif We note that an optical candidate reported by Guidorzi et al. (GCN 13092) is clearly seen in both a POSS2 image retrieved from the Digitized Sky Survey and our CQUEAN images, making it less likely that the object is a GRB afterglow. We thank Karl Gebhardt and his observing team for their help with the observation.