4 papers
Systematic Monitoring of Extreme X-ray Variability from Weak-line Quasars
Madison Reich, W. N. Brandt, Bin Luo +4
We present the results of a multi-cycle Chandra program to systematically monitor the X-ray variability of 10 weak-line quasars (WLQs) that previously had limited multi-epoch X-ray…
Gemini Near Infrared SpectrographDistant Quasar Survey: the Chandra View
Andrea Marlar, Ohad Shemmer, Michael S. Brotherton +5
We present Chandra observations of 63 sources from the Gemini Near Infrared SpectrographDistant Quasar Survey (GNIRS-DQS) of which 54 were targeted by snapshot observations in C…
Exploring the Spectral Energy Distributions of Luminous Broad Absorption Line Quasars at High Redshift
Harum Ahmed, Sarah C. Gallagher, Ohad Shemmer +4
We present the multiwavelength spectral energy distributions (SEDs) for 65 luminous broad absorption line (BAL) quasars with redshifts from the Gemi…
Intervening nuclear obscuration changing the X-ray look of the QSO CFHQS J164121+375520
Fabio Vito, William Nielsen Brandt, Andrea Comastri +16
X-ray observations of the optically selected QSO CFHQS J164121+375520 (hereafter J1641) revealed that its flux dropped by a factor from 2018, when it was a bri…