ASASSN-15at bright outburst Past ZTF data might suggest an SU UMa star. YYYYMMDD(UT) mag observer 20210105.2108 15.873zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210105.2691 16.062zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210107.2114 15.914zr (Zwicky Transient Facility Lasair (Masci+ 2019))