TITLE: GCN CIRCULAR NUMBER: 11118 SUBJECT: GRB 100814A : Lulin optical observation DATE: 10/08/17 08:03:26 GMT FROM: Yuji Urata at Nat. Central U. Y. Urata (NCU) and K.Y Huang (ASIAA) on behalf of EAFON report; "We observed the GRB 100814A optical afterglow (Beardmore et al. GCN 11087) using Lulin One-meter Telescope (LOT) with g', r', i' and z'-band filters. The observation started at 2010 August 16 19:09 about 2.65 days after the trigger. All of images show the optical afterglow clearly. The brightness of the afterglow calibrated against USNO-B1 stars in the field is R~19.2. The afterglow decays only ~0.5 magnitude from our previous observation at August 14 (0.7 days after the burst). This interesting feature is also notified by Pasquale (# 11107). Further observation is scheduled."