ER UMa outburst YYYYMMDD(UT) mag observer 20010112.837 <134 (E. Muyllaert) 20010112.899 <137 (M. Reszelski) 20010113.847 <142 (E. Muyllaert) 20010113.955 <139 (G. Poyner) 20010115.710 <134 (M. Westlund) 20010115.826 136 (G. Comello) 20010115.874 139 (E. Muyllaert)