MASTER OT J210334.55+234128.9 outburst Type unknown, but a normal outburst? YYYYMMDD(UT) mag observer 20200402.4870 18.462zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20200417.5022 14.816zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20200418.8269 146:c (Yutaka Maeda)