135 citations · 596 across the 24 of their papers we have counts for
4 papers · 1 filter
Taming the derivative: diagnostics of the continuum and H emission in a prototypical Population B active galaxy
Swayamtrupta Panda, Edi Bon, Paola Marziani +1
We report preliminary results on the analysis of the continuum and H light curves of the type-1 active galactic nucleus (AGN) NGC 5548. We notice a clear signature of shallowing…
A Possible ~20 yr Periodicity in Long-term Optical Photometric and Spectral Variations of the Nearby Radio-Quiet Active Galactic Nucleus Ark 120
Yan-Rong Li, Jian-Min Wang, Zhi-Xiang Zhang +15
We study the long-term variability in the optical monitoring database of Ark~120, a nearby radio-quiet active galactic nucleus (AGN) at a distance of 143 Mpc (z=0.03271). We compil…
Evidence for periodicity in 43 year-long monitoring of NGC 5548
E. Bon, S. Zucker, H. Netzer +14
We present an analysis of 43 years (1972 to 2015) of spectroscopic observations of the Seyfert 1 galaxy NGC 5548. This includes 12 years of new unpublished observations (2003 to 20…
The First Spectroscopically Resolved Sub-parsec Orbit of a Supermassive Binary Black Hole
E. Bon, P. Jovanović, P. Marziani +6
One of the most intriguing scenarios proposed to explain how active galactic nuclei are triggered involves the existence of a supermassive binary black hole system in their cores.…