MKN421 active state continues YYYYMMDD(UT) mag observer 20010211.923 133 (J. Ripero) 20010212.894 129 (G. Poyner) 20010212.919 133 (J. Ripero) 20010212.960 125 (H. McGee) 20010213.962 127 (G. Poyner) 20010215.610 129 (T. Watanabe) 20010215.889 129 (E. Muyllaert) 20010215.897 130 (H. McGee) 20010216.510 129 (T. Watanabe) 20010216.535 128 (T. Watanabe) 20010216.558 129 (T. Watanabe) 20010216.581 129 (T. Watanabe) 20010216.608 129 (T. Watanabe) 20010216.765 129 (T. Watanabe) 20010216.815 129 (T. Watanabe) 20010216.930 129 (J. Ripero) 20010217.906 129 (G. Poyner) 20010217.933 128 (J. Ripero) 20010218.385 126 (M. Simonsen) 20010218.514 129 (T. Watanabe) 20010218.680 126 (H. Maehara) 20010219.278 127 (M. Simonsen) 20010219.628 124 (H. Itoh) 20010219.919 127V (D. Rodriguez) 20010221.919 123V (D. Rodriguez) 20010221.960 126 (J. Ripero) 20010222.919 124 (J. Ripero) 20010223.938 126 (G. Poyner)