45 citations · 45 across the 2 of their papers we have counts for
5 papers
The aox--HeII EW Connection in Radio-Loud Quasars
John D. Timlin, Shifu Zhu, W. Niel Brandt +1
Radio-loud quasars (RLQs) are known to produce excess X-ray emission, compared to radio-quiet quasars (RQQs) of the same luminosity, commonly attributed to jet-related emission. Re…
Long-Timlescale X-ray Variability of BAL and Mini-BAL Quasars
John Timlin, W. N. Brandt, Shifu Zhu
We investigated the rest-frame 0.1-5 year X-ray variability properties of an unbiased and uniformly selected sample of 24 BAL and 35 mini-BAL quasars, making it the larges…
X-ray spectral variations of synchrotron peak in BL Lacs
Yijun Wang, Shifu Zhu, Yongquan Xue +3
The spectral energy distribution of blazars around the synchrotron peak can be well described by the log-parabolic model that has three parameters: peak energy (), pe…
Piercing Through Highly Obscured and Compton-thick AGNs in the Chandra Deep Fields: I. X-ray Spectral and Long-term Variability Analyses
Junyao Li, Yongquan Xue, Mouyuan Sun +13
We present a detailed X-ray spectral analysis of 1152 AGNs selected in the Chandra Deep Fields (CDFs), in order to identify highly obscured AGNs (…
Systematic investigation of X-ray spectral variability of TeV blazars during flares in the era
Yijun Wang, Yongquan Xue, Shifu Zhu +1
Utilizing all the 16-year observations, we analyze the X-ray spectra of 32 TeV blazars, and perform a systematic investigation of X-ray spectral variability for the 5 bright…