GK Per outburst (update) YYMMDD(UT) mag observer 990211.816 131 (E. Muyllaert) 990212.558 129 (T. Watanabe) 990212.774 129 (G. Comello) 990212.800 133 (A. Diepvens) 990212.819 129 (R. J. Johanns) 990213.397 129 (T. Watanabe) 990213.444 131 (N. Makiguchi) 990213.506 128 (M. Hiraga) 990213.512 130 (H. Itoh) 990213.531 132 (M. Nakatani) 990213.794 129 (R. J. Bouma) 990213.822 130 (E. Muyllaert) 990213.860 131 (G. Comello) 990213.908 134 (H. McGee) 990214.488 131 (H. Maehara) 990214.528 129 (M. Hiraga) 990214.573 129 (T. Watanabe) 990215.167 131 (R. J. Modic) 990215.474 130 (M. Hiraga) 990215.580 131 (T. Watanabe) 990216.740 131 (H-G. Lindberg) 990216.926 131 (G. Poyner) 990217.519 130 (T. Watanabe) 990217.839 132 (G. Comello) 990219.508 130 (S. Takahashi) 990220.514 128 (H. Maehara) 990220.528 126 (M. Nakatani) 990220.562 127 (T. Watanabe) 990220.565 124 (H. Itoh) 990220.608 122 (H. Itoh) 990220.787 125 (E. Muyllaert)