ASASSN-23df ATLAS detection Fainter outburst in 2019 Jan. in ATLAS? YYYYMMDD(UT) mag observer 20230426.7416 16.815o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230426.7447 16.796o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230426.7504 16.893o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))