V811 Cyg outburst YYYYMMDD(UT) mag observer 20010803.905 <143 (E. Muyllaert) 20010804.266 <140 (M. Simonsen) 20010805.278 <143 (M. Simonsen) 20010805.915 <143 (E. Muyllaert) 20010808.910 <143 (E. Muyllaert) 20010809.260 <140 (M. Simonsen) 20010809.903 <143 (E. Muyllaert) 20010811.269 <143 (M. Simonsen) 20010811.913 <143 (E. Muyllaert) 20010812.012 <150 (M. Reszelski) 20010813.161 133 (M. Simonsen) 20010814.264 138 (M. Simonsen) 20010814.876 137 (J. Ripero) 20010815.003 138 (M. Reszelski)