ASASSN-19dd possible superoutburst YYYYMMDD(UT) mag observer 20230530.0534 <17.205g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230531.0533 <16.940g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230602.0456 <16.679g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230605.0330 16.149g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230605.7848 16.667g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230606.0329 16.807g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230606.7716 16.807g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230606.8134 <16.639g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230608.0251 16.565g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230610.7069 16.543o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230610.7096 16.556o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230610.7153 16.581o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230610.7259 16.554o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230611.9994 16.615c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230612.0026 16.498c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230613.9844 16.316g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))