TITLE: GCN CIRCULAR NUMBER: 19863 SUBJECT: GRB 160824A: 1.5m OSN I-band observation DATE: 16/08/25 19:08:04 GMT FROM: Youdong HU at IAA-CSIC, UGR Y. Hu, A. Sota and A.J. Castro-Tirado (IAA-CSIC Granada), on behalf of a larger collaboration, report: Following the detection of GRB 160824A by Swift (Evans et al. GCNC 19855), optical images in the I-band were obtained at the 1.5m OSN telescope in Granada (Spain) starting at 01:25 (Aug 25), i.e. 2.05 h postburst. No optical afterglow is detected in the co-added image (13 x 300s, mid time 02:00 UT, 2.6 h after the trigger) within the enhanced Swift/XRT error box (Goad et al. GCNC 19857) down to I = 20.0.