Multi-epoch X-ray analysis of PHL 1811 indicates its apparent weakness results from heavy obscuration by a radiatively driven wind rather than intrinsic X-ray weakness.
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Low-luminosity AGN exhibit optical variability structure function slopes that increase with black hole mass from ~0.1 to ~0.3, with amplitude anticorrelated with luminosity, no breaks observed, and variability continuing to rise on 20-year timescales.
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The Curious Case of PHL 1811: Heavy Obscuration Versus Intrinsic X-ray Weakness
Multi-epoch X-ray analysis of PHL 1811 indicates its apparent weakness results from heavy obscuration by a radiatively driven wind rather than intrinsic X-ray weakness.
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Optical Variability Structure Function of Low-Luminosity AGN using ATLAS Lightcurves
Low-luminosity AGN exhibit optical variability structure function slopes that increase with black hole mass from ~0.1 to ~0.3, with amplitude anticorrelated with luminosity, no breaks observed, and variability continuing to rise on 20-year timescales.