BL Lac in action
As can be seen in recent AAVSO data, the classic blazar BL Lac has become active again. As recently as Sep 25 it was down at V ~14.2, but is now bouncing around V ~12.5. Two recent ATels report activity in the visible and at gamma-rays:
https://www.astronomerstelegram.org/?read=15684
https://www.astronomerstelegram.org/?read=15688
This activity is not unusual, but a potential precursor to an outburst.