Аннотация:MASTER-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) started inspect of the Fermi GRB220831.58 (trigger No 683646997,01h 52m 24.00s , -45d 05m 24.0s, R=7.86) errorbox 349 sec after notice time and 34983 sec after trigger time at 2022-08-31 23:39:36 UT, with upper limit up to 15.8 mag. The observations began at zenith distance = 27 deg. The sun altitude is -62.6 deg. The galactic latitude b = -68 deg., longitude l = 272 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2074300 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________| _____________________|__________ ___________|_____________________ _______________|_____|_______|___ ____|________ 35014 | 2022-08-31 23:39:36 | MASTER- SAAO | (01h 40m 09.68s , -44d 38m 08.0s) | C | 60 | 15.8 | 35093 | 2022-08-31 23:40:56 | MASTER-SAAO | (01h 51m 30.21s , -44d 38m 04.1s) | C | 60 | 14.9 | 35185 | 2022-08-31 23:42:28 | MASTER- SAAO | (01h 43m 43.63s , -46d 31m 42.7s) | C | 60 | 13.0 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.