Аннотация:MASTER-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Swift GRB 221027B ( A. Y. Lien et al., GCN 32867) errorbox 21757 sec after notice time and 22094 sec after trigger time at 2022-10-28 01:21:53 UT, with upper limit up to 18.5 mag. The observations began at zenith distance = 79 deg. The sun altitude is -31.2 deg. The galactic latitude b = 57 deg., longitude l = 80 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2136676 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_______________ ______|_____|_______|______|______ __ 22185 | MASTER-Tavrida | C | 180 | 17.6 | 22185 | MASTER- Tavrida | C | 180 | 15.2 | 22376 | MASTER-Tavrida | C | 180 | 17.9 | 22376 | MASTER-Tavrida | C | 180 | 15.1 | 22662 | MASTER- Tavrida | C | 180 | 18.3 | 22662 | MASTER-Tavrida | C | 180 | 15.4 | 23028 | MASTER-Tavrida | C | 180 | 18.3 | 23028 | MASTER- Tavrida | C | 180 | 16.0 | 23985 | MASTER-Tavrida | C | 180 | 18.5 | 23985 | MASTER-Tavrida | C | 180 | 18.0 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.