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astro-ph.HE2025
A Deep Chandra X-ray Survey of a Luminous Quasar Sample at 7
Xiangyu Jin, Feige Wang, Jinyi Yang +11
We present new Chandra observations of seven luminous quasars at . Combined with archival Chandra observations of all other known quasars, they form nearly complete X-ray ob…
astro-ph.HE2020★ 13 cited
More than softer-when-brighter: the X-Ray powerlaw spectral variability in NGC 4051
Yun-Jing Wu, Jun-Xian Wang, Zhen-Yi Cai +3
The powerlaw X-ray spectra of active galactic nuclei at moderate to high accretion rates normally appear softer when they brighten, for which the underlying mechanisms are yet uncl…