Аннотация:MASTER-SAAO auto-detection system ( Lipunov et al., “MASTER Global Robotic Net”, Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 19h 42m 30.94s +07d 25m 37.1s on 2020-05-20.02309 UT. The OT unfiltered magnitude is 17.8m(mlim=18.7).