Аннотация:https://gcn.gsfc.nasa.gov/gcn3/27517.gcn3MASTER-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 GRB200410.10 (trigger No 965638,19h 58m 32.88s , +51d 45m 46.8s, R=0.05) errorbox 16 sec after notice time and 55 sec after trigger time at 2020-04-10 02:26:05 UT, with upper limit up to 16.1 mag. Observations started at twilight. The observations began at zenith distance = 23 deg. The sun altitude is -8.2 deg. The galactic latitude b = 11 deg., longitude l = 86 deg.Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1333659We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment_________|_____________________|_____|_______|______|________ 60 | MASTER-Tavrida | C | 10 | 15.5 | 80 | MASTER-Tavrida | C | 50 | 16.1 | Coadd 96 | MASTER-Tavrida | C | 20 | 15.7 | 136 | MASTER-Tavrida | C | 20 | 15.5 | 181 | MASTER-Tavrida | C | 30 | 15.4 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.