TITLE: GCN CIRCULAR NUMBER: 19141 SUBJECT: GRB 160303A: BOAO R-band Detection DATE: 16/03/04 15:28:40 GMT FROM: Myungshin Im at Seoul Nat U Myungshin Im (CEOU/SNU), Hyun-Il Sung (KASI), Yuji Urata (NCU), Soomin Jeong (SKKU/IAA-CSIC) We observed the field of GRB 160303A (Beardmore et al. GCN 19126) using the 1.8m telescope at the Bohyunsan Optical Astronomy Observatory ​ ​ (BOAO) in Korea. The observation started at 2016-02-28 13:31:46 UT, ​ ​ or about 2.6 hours after the BAT alert. We clearly identify the afterglow at the location of the RATIR detection (Butler et al. GCN 19131) with R = 22.75 +- 0.12 mag in a stacked image of 6 x 5 min frames (Mid-point: 2016-02-28 13:54). Together with the ​ result​ at 10 ​ ​ hrs after the BAT alert (de Ugarte Postiago et al. ​​ GCN 19136), our photometry unambiguously confirms the fading nature of this source. Further observation and the analysis of the data are planned. We thank the BOAO staffs for their assistance with the observation.