Аннотация:MASTER-IAC robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Spain (IAC Teide Observatory) was pointed to the GRB200716C (Ukwatta et al, GCN 28124) 55 sec after notice time and 79 sec after trigger time at 2020-07-16 22:59:00 UT.On our 5-th (50s exposure) set , obtained 243 sec after tigger timeat 2020-07-16 23:01:45 UT, we found an optical transient within Swift error-box (ra=196.012 dec=29.6292 r=0.05) brighter. T-Tmid Date Time Expt. Ra Dec Mag---------|---------------------|-------|-----------------|-----------------|----- 268 2020-07-16 23:01:45 50 (13h 04m 02.41s , +29d 38m 39.4s) 16.3The 5-sigma upper limit has been about 16.6magThe message may be cited.https://gcn.gsfc.nasa.gov/gcn3/28125.gcn3