ASASSN-15dq superoutburst YYYYMMDD(UT) mag observer 20230326.4430 <152c (Yutaka Maeda) 20230327.1182 18.354o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230328.4727 <158c (Yutaka Maeda) 20230402.4347 <147c (Yutaka Maeda) 20230406.9332 16.247o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230406.9412 16.159o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230406.9462 16.102o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230406.9595 16.088o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.4537 140:c (Yutaka Maeda) 20230408.4619 142cG (Yutaka Maeda)