72 citations · 506 across the 18 of their papers we have counts for
5 papers · 1 filter
Incorporating Measurement Error in Astronomical Object Classification
Sarah Shy, Hyungsuk Tak, Eric D. Feigelson +2
Most general-purpose classification methods, such as support-vector machine (SVM) and random forest (RF), fail to account for an unusual characteristic of astronomical data: known…
The X-ray spectral and variability properties of typical radio-loud quasars
Shifu Zhu, John Timlin, W. N. Brandt
We present X-ray spectral and long-term variability analyses of an unbiased sample of 361 optically selected radio-loud quasars (RLQs) utilizing sensitive serendipitous X-ray data…
Multi-epoch spectroscopy of Mg II broad absorption line transitions
Weimin Yi, John Timlin
Built upon a sample of 134 quasars that was dedicated to a systematic study of \mgii-BAL variability from Yi et al. (2019a), we investigate these quasars showing \mgii-BAL disappea…
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…
On the Observational Difference Between the Accretion Disk-Corona Connections among Super- and Sub-Eddington Accreting Active Galactic Nuclei
Hezhen Liu, B. Luo, W. N. Brandt +5
We present a systematic X-ray and multiwavelength study of a sample of 47 active galactic nuclei (AGNs) with reverberation-mapping measurements. This sample includes 21 super-Eddin…