BL Lac may be active again Possible existence of short-term variation? YYYYMMDD(UT) mag observer 20000703.985 <143 (E. Muyllaert) 20000704.267 152 (G. Hanson) 20000705.250 153 (G. Hanson) 20000706.240 154 (G. Hanson) 20000707.206 153 (G. Hanson) 20000707.307 <143 (M. Simonsen) 20000707.910 14.45V (D. Rodriguez)