TITLE: GCN CIRCULAR NUMBER: 16557 SUBJECT: GRB 140709B: OSN optical limit DATE: 14/07/09 22:47:34 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia A. Sota (IAA-CSIC), J. Gorosabel (IAA-CSIC, UPV-EHU) and A. J. Castro-Tirado (IAA-CSIC, ISA-UMA), on behalf of a larger collaboration, report: Following the detection of GRB 140709B by Swift (Swenson et al. GCNC 16551), we have taken I-band frames with the 1.5m OSN telescope at Observatorio de Sierra Nevada (Granada, Spain) starting at 20:45 UT (5.5 h post burst) at high airmass. Within the enhanced XRT position (Goad et al. GCNC 16556) we find no credible counterpart down to the DSS-2 limiting magnitude when all the images are co-added (10 x 150s). Near-infrared imaging is encouraged.