V503 Cyg superoutburst fading YYYYMMDD(UT) mag observer 20010512.994 <142 (H. McGee) 20010513.010 <152 (M. Reszelski) 20010513.050 <156 (G. Poyner) 20010513.330 <142 (M. Simonsen) 20010513.935 <148 (M. Reszelski) 20010514.992 <152 (M. Reszelski) 20010517.017 137 (P. A. Dubovsky) 20010518.014 135 (M. Reszelski) 20010519.069 134 (H. McGee) 20010520.017 135 (M. Reszelski) 20010520.076 136 (G. Poyner) 20010520.324 137 (M. Simonsen) 20010520.951 134 (E. Muyllaert) 20010520.953 137: (M. Reszelski) 20010521.024 133 (P. A. Dubovsky) 20010521.053 134 (H. McGee) 20010522.056 138 (G. Poyner) 20010522.956 139 (E. Muyllaert) 20010522.992 139 (P. A. Dubovsky) 20010523.021 136 (M. Reszelski) 20010523.058 141 (H. McGee) 20010523.074 140 (G. Poyner) 20010524.023 139 (M. Reszelski) 20010524.028 141 (H. McGee) 20010524.038 141 (G. Poyner) 20010524.969 141 (H. McGee) 20010525.012 143 (M. Reszelski) 20010525.028 141 (P. A. Dubovsky) 20010526.034 144 (P. A. Dubovsky) 20010527.951 <138 (E. Muyllaert) 20010530.017 153 (G. Poyner) 20010530.949 <142 (E. Muyllaert) 20010531.042 <142 (H. McGee)