1RXS J185310.0+594509 superoutburst YYYYMMDD(UT) mag observer 20210829.2269 18.850zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210829.2271 18.850zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210829.5333 <150c (Yutaka Maeda) 20210830.5219 <149c (Yutaka Maeda) 20210831.5156 <156c (Yutaka Maeda) 20210903.3050 18.361zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210903.3052 18.361zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210903.3265 17.899zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210903.3267 17.899zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.2985 14.947zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.3624 15.207zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210906.889 151C (Jeremy Shears) 20210907.2401 14.996zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210907.3014 15.232zr (Zwicky Transient Facility Lasair (Masci+ 2019))