The extremes of AGN variability: outbursts, deep fades, changing looks, exceptional spectral states, and semi-periodicities

S Komossa, D Grupe, P Marziani, LC Popovic… - arxiv preprint arxiv …, 2024 - arxiv.org
The extremes of Active Galactic Nuclei (AGN) variability offer valuable new insights into the
drivers and physics of AGN. We discuss some of the most extreme cases of AGN variability; …