299 citations · 646 across the 23 of their papers we have counts for
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astro-ph.GA2017★ 2 cited
Analysis of the rich optical iron-line spectrum of the x-ray variable I Zw 1 AGN 1H0707-495
Hartmut Winkler, Bynish Paul
Thirty years ago the optical counterpart of the x-ray source 1H0707-495 was discovered to be a 15th magnitude broad-line Seyfert galaxy with a rich Fe II emission line spectrum typ…
astro-ph.HE2017★ 51 cited
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…