Аннотация:MASTER-Kislovodsk auto-detection system ( Lipunov et al., “MASTER Global Robotic Net”, Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 00h 43m 10.68s +41d 26m 04.3s on 2021-04-15.02956 UT. The OT unfiltered magnitude is 18.2m (mlim=19.2).