Аннотация:https://gcn.gsfc.nasa.gov/gcn3/32524.gcn3MASTER-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the Swift GRB220907.59 (trigger No 1123129,17h 55m 28.80s , -20d 18m 55.1s, R=0.05) errorbox 67 sec after notice time and 83 sec after trigger time at 2022-09-07 14:06:49 UT, with upper limit up to 13.9 mag. The observations began at zenith distance = 75 deg. The sun altitude is -21.4 deg. The galactic latitude b = 2 deg., longitude l = 9 deg.Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2082082We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment 85 | MASTER-Tunka | C | 1 | 13.9 | 91 | MASTER-Tunka | C | 1 | 13.8 | 97 | MASTER-Tunka | C | 1 | 13.8 | 103 | MASTER-Tunka | C | 1 | 13.9 | 109 | MASTER-Tunka | C | 1 | 13.9 | 115 | MASTER-Tunka | C | 1 | 13.8 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.