TITLE: GCN CIRCULAR NUMBER: 19907 SUBJECT: GRB 160910A: Afterglow detection from OSN DATE: 16/09/11 20:56:28 GMT FROM: Antonio de Ugarte Postigo at IAA-CSIC A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), L. Izzo (IAA-CSIC), D.A. Kann (TLS Tautenburg), V. Casanova (IAA-CSIC) report on behalf of a larger collaboration: We have observed the field of GRB 160910A (Veres et al. GCN 19901, Racusin et al. GCN 19902, D’Aì et al. GCN 19904) with the 1.5m OSN telescope in Granada (Spain). The observation consisted of I-band imaging and started at 20:15:07 (26.92 hr after the burst). On the first 300 s image we detect an object within the XRT error box at I(AB) ~ 19.3 mag, not present in the SDSS images, which we identify as the counterpart of GRB 160910A We encourage further follow-up and spectroscopy of this bright afterglow.