TITLE: GCN CIRCULAR NUMBER: 15689 SUBJECT: LOAO R-band Observation of GRB 140102A DATE: 14/01/06 02:52:23 GMT FROM: Changsu Choi at Seoul Nat U Changsu Choi, Myungshin Im (CEOU/SNU), Hyun-Il Sung (KASI), and Yuji Urata (NCU), on behalf of EAFON We observed the field of GRB 140102A (Hagen et al., GCN 15653) in R-band using the 1-m telescope at Mt. Lemmon Optical Observatory (LOAO) in Arizona, US The observation started at 2014-01-03 13:01:40 UT, or about 15.34 hours after the BAT alert. We marginally identify the afterglow in a stacked image with a total exposure time of ~ 45min. The approximate magnitude of the object is R(Vega) = 21.5 +- 0.3 mag, calibrated against R1-mag of USNO-B1 stars in the vicinity. We thank the LOAO operator, Jae-Hyuk Yoon for performing the observation.