TITLE: GCN CIRCULAR NUMBER: 12177 SUBJECT: GRB 110719A: optical upper limit DATE: 11/07/19 15:54:18 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (SAI MSU), L. Elenin (ISON), I. Molotov (ISON), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 110719A (Sakamoto et al. GCN 12173) with 0.45-m telescope Ïf ISON-NM observatory on July 19 starting (UT) 06:54:39. We took 30 unfiltered images. In a stacked image we do not detect any source within enhanced XRT error circle (Goad et al., GCN 12176) up to 19.7m. The photometry is based on the USNO-B1.0 1245-0023215 star (RA=01:38:11.95, Dec=+34:35:52.6) assuming R=13.72. T0+ Filter, Exposure, OT, Upper Limit (mid, d) (s) 0.04370 none 30x60s n/d 19.7