BL Lac outburst and apparent short-term large variation! Apparent intranight variation present! Frequent obvserations are very urged. YYYYMMDD(UT) mag observer 20000914.819 144 (T. Kinnunen) 20000914.860 <137 (E. Muyllaert) 20000915.819 145 (T. Kinnunen) 20000915.822 <137 (J. Ripero) 20000916.830 145 (T. Kinnunen) 20000916.880 147 (M. Verdenet) 20000917.810 148 (T. Kinnunen) 20000917.830 147 (M. Verdenet) 20000918.082 145 (M. Reszelski) 20000918.147 144 (M. Simonsen) 20000918.810 145 (T. Kinnunen) 20000918.850 145 (M. Verdenet) 20000918.976 147 (G. Poyner) 20000919.780 146 (T. Kinnunen) 20000920.780 145 (T. Kinnunen) 20000920.819 145 (M. Verdenet) 20000920.865 142 (E. Muyllaert) 20000920.909 139 (C. P. Jones) 20000920.958 142 (C. P. Jones) 20000920.976 145 (G. Poyner) 20000921.003 143 (G. Poyner) 20000921.026 142 (G. Poyner) 20000921.053 143 (G. Poyner)