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146 papers
Reprocessing Models for the Optical Light Curves of Hypervariable Quasars from the Sloan Digital Sky Survey Reverberation Mapping Project
Tatsuya Akiba, Jason Dexter, William Brandt +5
We explore reprocessing models for a sample of 17 hypervariable quasars, taken from the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) project, which all show coordinated…
Gemini Near Infrared Spectrograph -- Distant Quasar Survey: Augmented Spectroscopic Catalog and a Prescription for Correcting UV-Based Quasar Redshifts
Brandon M. Matthews, Cooper Dix, Ohad Shemmer +13
Quasars at most often have redshifts measured from rest-frame ultraviolet emission lines. One of the most common such lines, C IV , shows blueshifts up to ${…
Radio AGN Selection and Characterization in Three Deep-Drilling Fields of the Vera C. Rubin Observatory Legacy Survey of Space and Time
Shifu Zhu, William N. Brandt, Fan Zou +4
The Australia Telescope Large Area Survey (ATLAS) and the VLA survey in the XMM-LSS/VIDEO deep field provide deep ( Jybeam) and high-resolution ( 4.5…
Shedding New Light on Weak Emission-Line Quasars in the C-H Parameter Space
Trung Ha, Cooper Dix, Brandon M. Matthews +20
Weak emission-line quasars (WLQs) are a subset of Type 1 quasars that exhibit extremely weak LyN V 1240 and/or C IV 1549 emission lines. We investigate the relationship b…
X-ray Unveiling Events in a z~1.6 Active Galactic Nucleus in the 7 Ms Chandra Deep Field-South
Li-Ming Yu, Bin Luo, William N. Brandt +14
We investigate the extreme X-ray variability of a z = 1.608 active galactic nucleus in the 7 Ms Chandra Deep Field-South (XID 403), which showed two significant X-ray brightening e…
The Sloan Digital Sky Survey Reverberation Mapping Project: The Black Hole MassStellar Mass Relations at
Jennifer I-Hsiu Li, Yue Shen, Luis C. Ho +7
We measure the correlation between black-hole mass and host stellar mass for a sample of 38 broad-line quasars at (median redshift $z…