Аннотация:MASTER Global Robotic Net (http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) covered 1525 square degrees of S299213t (LVC GCN #27042, Lipunov et al. GCN #27041, GCN #27072 https://gcn.gsfc.nasa.gov/other/S200213t.gcn3 ) that is equal to 100% of 50%-error-field and 81% of 90%-error-field https://master.sai.msu.ru/site/master2/ligo_1.php?id=11331 AT2020cph MASTER-SAAO auto-detection system discovered OT source at R.A.,Dec(2000) = 04h 40m 08.76s -65d 13m 02.3s on 2020-02-14.91294 UT. The OT unfiltered magnitude (automatic photometry): 2020-02-13 22:03:33UT 19.6 2020-02-14 02:11:16UT 19.0 2020-02-14 22:04:43UT 18.9 We have reference image on 2017-12-22.95279 UT with unfiltered mlim= 20.3m, nearest in time at 2020-01-27 20:13:33 with mlim=19.0 There is no any sources in VIZIER database and in MASTER database(since Dec 2014) at this position PGC315337 has Btc=16.2 (no V in LEDA, NED) Observations and analisys will be continued.