705 citations · 4.9k across the 53 of their papers we have counts for
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astro-ph.HE2021★ 14 cited
Probing the disk-corona systems and broad line regions of changing-look quasars with X-ray and optical observations
Xiangyu Jin, John J. Ruan, Daryl Haggard +8
"Changing-look" quasars are a new class of highly variable active galactic nuclei that have changed their spectral type over surprisingly short timescales of just a few years. The…
astro-ph.HE2021★ 63 cited
The 450 days X-ray monitoring of the changing-look AGN 1ES 1927+654
C. Ricci, M. Loewenstein, E. Kara +16
1ES 1927+654 is a nearby active galactic nucleus (AGN) which underwent a changing-look event in early 2018, developing prominent broad Balmer lines which were absent in previous ob…