V503 Cyg superoutburst, fading YYYYMMDD(UT) mag observer 20010808.913 <142 (E. Muyllaert) 20010809.283 <142 (M. Simonsen) 20010809.906 <142 (E. Muyllaert) 20010810.033 <150 (G. Poyner) 20010810.944 <142 (H. McGee) 20010811.290 <146 (M. Simonsen) 20010811.916 <142 (E. Muyllaert) 20010812.021 <152 (M. Reszelski) 20010813.174 <138 (M. Simonsen) 20010814.285 137 (M. Simonsen) 20010814.875 130 (J. Ripero) 20010814.892 135 (E. Muyllaert) 20010814.973 140 (P. A. Dubovsky) 20010815.012 134 (M. Reszelski) 20010815.256 135 (M. Simonsen) 20010815.983 139 (P. A. Dubovsky) 20010816.012 135 (M. Reszelski) 20010816.907 135 (E. Muyllaert) 20010816.982 139 (P. A. Dubovsky) 20010817.021 134 (G. Poyner) 20010817.899 138 (E. Muyllaert) 20010818.989 139 (P. A. Dubovsky) 20010819.891 137 (J. Ripero) 20010820.875 139 (J. Ripero) 20010820.885 140 (E. Muyllaert) 20010821.302 138 (M. Simonsen) 20010821.871 141 (E. Muyllaert) 20010823.026 145 (M. Reszelski)