Аннотация:https://gcn.gsfc.nasa.gov/gcn3/28204.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) started inspect of the Fermi GRB 200803B ( Fermi GBM team, GCN 28201) errorbox 558 sec after notice time and 586 sec after trigger time at 2020-08-03 17:02:29 UT, with upper limit up to 18.9 mag. Observations started at twilight. The observations began at zenith distance = 25 deg. The sun altitude is -12.7 deg. The galactic latitude b = 20 deg., longitude l = 308 deg.Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1413147We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment_________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 646 | 2020-08-03 17:02:29 | MASTER-SAAO | (13h 17m 10.58s , -42d 23m 09.6s) | C | 120 | 18.1 | 807 | 2020-08-03 17:04:55 | MASTER-SAAO | (13h 17m 11.44s , -42d 22m 10.7s) | C | 150 | 18.2 | 807 | 2020-08-03 17:04:55 | MASTER-SAAO | (13h 07m 35.82s , -42d 23m 16.8s) | C | 150 | 18.7 | 991 | 2020-08-03 17:07:45 | MASTER-SAAO | (13h 17m 16.35s , -42d 23m 11.8s) | C | 180 | 18.2 | 991 | 2020-08-03 17:07:45 | MASTER-SAAO | (13h 07m 40.58s , -42d 24m 18.0s) | C | 180 | 18.9 | 1191 | 2020-08-03 17:11:04 | MASTER-SAAO | (13h 17m 11.97s , -42d 24m 13.2s) | C | 180 | 18.1 | 1191 | 2020-08-03 17:11:04 | MASTER-SAAO | (13h 07m 36.04s , -42d 25m 19.1s) | C | 180 | 18.8 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.