SDSS J152419.33+220920.0 outburst UGSU+E YYYYMMDD(UT) mag observer 20220531.2786 18.394zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220602.2749 19.395zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220603.5512 <158c (Yutaka Maeda) 20220606.2132 18.414zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220606.5588 <157c (Yutaka Maeda) 20220610.3212 15.400zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220610.3661 15.562zg (Zwicky Transient Facility Lasair (Masci+ 2019))