MASTER OT J155215.19+831424.4 possible superoutburst

Type from ZTF data.

YYYYMMDD(UT) mag observer 20220418.6094 <158c (Yutaka Maeda) 20220419.6140 <153c (Yutaka Maeda) 20220421.4282 16.070zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220421.4685 16.109zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220424.6172 <157c (Yutaka Maeda) 20220425.2789 16.193zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220425.4116 16.222zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220427.1999 16.471zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220427.2658 16.803zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220429.3873 16.638zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220501.2588 16.692zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220501.2863 16.720zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.3130 16.918zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.3676 16.787zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.6015 <162c (Yutaka Maeda) 20220504.5874 <153c (Yutaka Maeda)