X Leo outburst YYYYMMDD(UT) mag observer 20010408.510 <123 (R. Stubbings) 20010408.558 <125 (P. Nelson) 20010409.132 <135 (M. Simonsen) 20010409.410 <125 (R. Stubbings) 20010409.810 <143 (T. Kinnunen) 20010409.858 <135 (E. Muyllaert) 20010410.819 <135 (T. Kinnunen) 20010410.826 <150 (M. Reszelski) 20010410.940 <135 (H. McGee) 20010411.869 <141 (J. Ripero) 20010411.878 <143 (E. Muyllaert) 20010412.412 <141 (R. Stubbings) 20010412.848 134 (M. Reszelski) 20010413.417 123 (R. Stubbings) 20010413.440 121: (P. Nelson) 20010413.858 120 (J. Ripero)