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CLAMATO DR2 redshift catalog
We present the second data release of the COSMOS Ly{alpha} Mapping And Tomography Observations Survey conducted with the Low Resolution Imaging Spectrometer on the Keck I... -
13yr of R-band monitoring for 8 FRII quasars
We characterize the optical variability properties of eight lobe-dominated radio quasars (QSOs): B2 0709+37, FBQS J095206.3+235245, PG 1004+130, [HB89] 1156+631, [HB89]... -
Swift X-ray obs. of 31 SMS4 QSOs & radio gal.
We present Neil Gehrels Swift Observatory (hereafter Swift) observations of 31 sources from the SMS4 catalog, a sample of 137 bright radio sources originally designed to extend... -
NGT gri monitoring of the FSRQ 3C 454.3
Based on the database monitored by the 1.26m National Astronomical Observatory-Guangzhou University Infrared/Optical Telescope, we studied the optical variabilities of FSRQ... -
Spectral energy distributions for 4FGL blazars
In this paper, the multiwavelength data from radio to X-ray bands for 2709 blazars in the 4FGL-DR3 catalog are compiled to calculate their spectral energy distributions using a... -
AGNs with H{beta} asymmetry. III. 15 PG quasars
In this third paper of the series reporting on the reverberation mapping campaign of active galactic nuclei with asymmetric H{beta} emission-line profiles, we present results... -
BASS. XXIV. DR2 spectral line measurements of AGNs
We present the second catalog and data release of optical spectral line measurements and active galactic nucleus (AGN) demographics of the BAT AGN Spectroscopic Survey, which... -
Finding GPQs. II. Sp. observations of |b|<20{deg} QSOs
Quasars behind the Galactic plane (GPQs) are important astrometric references and valuable probes of Galactic gas, yet the search for GPQs is difficult due to severe extinction... -
Properties of ICRF3 sources from SDSS spectra
Despite their importance for astrometry and navigation, the active galactic nuclei (AGNs) that comprise the International Celestial Reference Frame (ICRF) are relatively poorly... -
Jet kinematics of blazars at 43GHz with 10yrs obs.
We analyze the parsec-scale jet kinematics from 2007 June to 2018 December of a sample of {gamma}-ray bright blazars monitored roughly monthly with the Very Long Baseline Array... -
SHELLQs. XVI. New quasars at 5.8<z<7
We present the spectroscopic discovery of 69 quasars at 5.8<z<7.0, drawn from the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) imaging survey data. This is the... -
Iron template spectrum from Mrk493 HST/STIS obs.
We present a new empirical template for iron emission in active galactic nuclei (AGNs) covering the 4000-5600{AA} range. The new template is based on a spectrum of the... -
Damped Ly{alpha} systems from SDSS DR16Q
We present the characteristics of the damped Ly{alpha} (DLA) systems found in data release DR16 of the extended Baryon Oscillation Spectroscopic Survey of the Sloan Digital Sky... -
V and R -band light curves of BZCAT blazars
In an optical monitoring program to characterize the variability properties of blazars, we observed 10 sources from the Roma-BZCAT catalog for 26 nights in V and R bands during... -
Finding QSOs behind the Galactic Plane. I. The GPQ cat.
Quasars behind the Galactic plane (GPQs) are important astrometric references and useful probes of Milky Way gas. However, the search for GPQs is difficult due to large... -
Giant radio quasars from SDSS, FIRST & NVSS
We present the largest sample of giant radio quasars (GRQs), which are defined as having a projected linear size greater than 0.7Mpc. The sample consists of 272 GRQs, of which... -
SEAMBHs XII. Reberberation mapping for 15 PG QSOs
In this work, we present the first results of the long-term high-cadence spectroscopic monitoring of 15 PG quasars with relatively strong FeII emission, as a part of a broader... -
12yrs of R-band photometry of the quasar 3C 454.3
In this work, we present 8523 pairs of R-band optical photometry observations for the quasar 3C 454.3 made during the period of 2006 October - 2018 February on the 70cm meniscus... -
The GNRIS-Distant Quasar Survey (GNRIS-DQS)
We present spectroscopic measurements for 226 sources from the Gemini Near Infrared Spectrograph-Distant Quasar Survey (GNIRS-DQS). Being the largest uniform, homogeneous survey... -
Variable MgII NALs in SDSS DR14
Compared to high ionization CIV absorption lines, variable MgII absorption lines are rare. Using spectra from the Sloan Digital Sky Survey, we investigate the variations in MgII...
