Left Image: OJ287 imaged at the University Observatory in Großschwabhausen during its photometric outburst on the morning of 12 Nov 2021 with the Cassegrain-Teleskop-Kamera-II in the R-band (659 nm).

Right Image: R-band light curve of OJ287 with the detected strong intraday flare (marked with a black arrow), which reached its maximum on 12 Nov 2021....