Аннотация:https://gcn.gsfc.nasa.gov/gcn3/26658.gcn3MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB200107.81 (trigger No 948219,07h 08m 15.74s , -83d 42m 56.5s, R=0.05) errorbox 18 sec after notice time and 69 sec after trigger time at 2020-01-07 19:27:38 UT, with upper limit up to 17.7 mag. The observations began at zenith distance = 54 deg. The sun altitude is -18.0 deg. The galactic latitude b = -27 deg., longitude l = 296 deg.Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1253647We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment_________|_____________________|_____|_______|______|________ 75 | MASTER-SAAO | P\ | 10 | 16.5 | 98 | MASTER-SAAO | P\ | 20 | 16.9 | 126 | MASTER-SAAO | P\ | 20 | 16.9 | 159 | MASTER-SAAO | P\ | 30 | 17.0 | 203 | MASTER-SAAO | P\ | 40 | 17.3 | 256 | MASTER-SAAO | P\ | 50 | 17.3 | 319 | MASTER-SAAO | P\ | 60 | 17.5 | 393 | MASTER-SAAO | P\ | 70 | 17.7 | The observation and reduction will continue. The message may be cited.