The Sloan Digital Sky Survey Quasar Catalog: twelfth data release

Abstract

We present the Data Release 12 Quasar catalog (DR12Q) from the Baryon Oscillation Spectroscopic Survey (BOSS) of the SDSS-III. This catalog includes all SDSS-III/BOSS objects that were spectroscopically targeted as quasar candidates during the full survey and that are confirmed as quasars via visual inspection of the spectra, have luminosities Mi[z=2]<-20.5 (in a LCDM cosmology with H_0 = 70 km/s/Mpc, Omega_M = 0.3, and Omega _L=0.7), and either display at least one emission line with a full width at half maximum (FWHM)larger than 500 km/s or, if not, have interesting/complex absorption features. The catalog also includes previously known quasars (mostly from SDSS-I and II) that were reobserved by BOSS. The catalog contains 297,301 quasars detected over 9,376 square degrees with robust identification and redshift measured by a combination of principal component eigenspectra. The number of quasars with z>2.15 is about an order of magnitude greater than the number of z>2.15 quasars known prior to BOSS. Redshifts and FWHMs are provided for the strongest emission lines (CIV, CIII], MgII). The catalog identifies 29,580 broad absorption line quasars and lists their characteristics. For each object, the catalog presents five-band (u, g, r, i, z) CCD-based photometry together with some information on the optical morphology and the selection criteria. When available, the catalog also provides information on the optical variability of quasars using SDSS and PTF multi-epoch photometry. The catalog also contains X-ray, ultraviolet, near-infrared, and radio emission properties of the quasars, when available, from other large-area surveys. The calibrated digital spectra, covering the wavelength region 3,600-10,500A at a spectral resolution in the range 1,300<R<2,500, can be retrieved from the SDSS Catalog Archive Server.

arXiv commentAccepted for publication in A&A. The catalog is publicly available here: http://www.sdss.org/dr12/algorithms/boss-dr12-quasar-catalog

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• The Redshift Distribution of Infrared-Faint Radio Sources
• Chemical enrichment and host galaxies of extremely-strong intervening DLAs towards quasars
• Galaxy Spectra neural Network (GaSNet). II. Using Deep Learning for Spectral Classification and Redshift Predictions
• Radiation-pressure Waves and Multiphase Quasar Outflows
• A New Multi-Wavelength Census of Blazars
• Searching for Super-Eddington Quasars using a Photon Trapping Accretion Disc Model
• The thermal and gravitational energy densities in the large-scale structure of the Universe
• QSO MUSEUM II: Search for extended Ly$\alpha$ emission around eight $z\sim 3$ quasar pairs
• Active Galactic Nuclei Abundance in Cosmic Voids
• Black hole virial masses from single-epoch photometry: the miniJPAS test case
• Ghostly Damped Ly$\alpha$ Systems: Tracers of Gas Flows in the Close Vicinity of Quasars ?
• Quasi-stellar objects and galaxy mass density profiles derived using the submillimetre galaxies magnification bias
• Multiwavelength analysis and the C IV λ1549 Å emission line behavior from 2008 to 2020 of the FSRQ B2 1633+382
• Faint Quasars Live in the Same Number Density Environments as Lyman Break Galaxies at z ~ 4
• Identification confusion and blending concealment in the SDSS-DR16 Quasar catalogues -- 40 new quasars and 82 false quasars identified
• Discovery of Metastable He I* $\lambda$10830 Mini-broad Absorption Lines and Very Narrow Paschen $\alpha$ Emission Lines in the ULIRG Quasar IRAS F11119+3257
• The Circumgalactic Medium of Submillimeter Galaxies. II. Unobscured QSOs within Dusty Starbursts and QSO Sightlines with Impact Parameters below 100 Kiloparsec
• X-ray Luminosity Function of Quasars at 3<z<5 from XMM-Newton Serendipitous Survey Data
• Extreme circumgalactic HI and CIII absorption around the most massive, quenched galaxies
• Multi-epoch spectroscopy of Mg II broad absorption line transitions
• Evaluating and Improving the Redshifts of z>2.2 Quasars
• On the limitations of statistical absorption studies with the Sloan Digital Sky Surveys I--III
• Possible evolution of the circum-galactic medium around QSOs with QSO age and cosmic time revealed by Ly$\alpha$ halos
• Overdensity of galaxies in the environment of quasar pairs
• Determination of astrophysical parameters of quasars within the Gaia mission
• Spectroscopic QUasar Extractor and redshift (z) EstimatorSQUEzE II: Universality of the results
• Extreme [OIII] Emitters at z $\sim$ 0.5
• Properties of a Previously Unidentified Instrumental Signature in $\text{Kepler/K2}$ that was Confused for AGN Variability
• Discovery of a Low-Redshift Damped Ly$\alpha$ System in a Foreground Extended Disk Using a Starburst Galaxy Background Illuminator
• A SysTematic seaRch fOr Dual Agns in meRgINg Galaxies (ASTRO-DARING) II: first results from long-slit spectroscopic observations
• X-ray Insights into the Nature of Quasars with Redshifted Broad Absorption Lines
• A multi-wavelength continuum characterization of high-redshift broad absorption line quasars
• High-$z$ Universe probed via Lensing by QSOs (HULQ) I. Number Estimates of QSO-QSO and QSO-Galaxy Lenses
• Absorption-line Environments of High-redshift BOSS Quasars
• FNet II: Spectral Classification of Quasars, Galaxies, Stars, and broad absorption line (BAL) Quasars
• Galaxy Properties Derived with Spectral Energy Distribution Fitting in the Hawaii-Hubble Deep Field-North
• Probing the Heart of Active Narrow-line Seyfert 1 Galaxies with VERA Wideband Polarimetry
• Quasi-Stellar Objects acting as potential Strong Gravitational Lenses in the SDSS-III BOSS survey
• Clustering of galaxies around AGN in the HSC Wide survey
• Improved selection of extremely red quasars with boxy CIV lines in BOSS
• An Optically Faint Quasar Survey at z~5 in the CFHTLS Wide Field: Estimates of the Black Hole Masses and Eddington Ratios
• The Atacama Cosmology Telescope: Flux Upper Limits from a Targeted Search for Extragalactic Transients
• Extreme High-velocity Outflows from High-redshift BOSS Quasars
• The Spectroscopic Signature of Variability in High-Redshift Quasars
• The detections of inflowing gas from narrow absorption lines at the parsec scale
• An Intercomparison Study of Two Proximate Damped Ly$\alpha$ Systems with Residual Flux upon the Ly$\alpha$ Absorption Trough toward Quasars
• A search for cosmological anisotropy using the Lyman alpha forest from SDSS quasar spectra
• A metal-line strength indicator for Damped Lyman Alpha (DLA) systems at low signal-to-noise
• Deep CFHT Y-band Imaging of VVDS-F22 Field: II. Quasar Selection and Quasar Luminosity Function
• Efficient Identification of Broad Absorption Line Quasars using Dimensionality Reduction and Machine Learning
• Optical Spectroscopy of Dual Quasar Candidates from the Subaru HSC-SSP program
• Spectral shape corrections for SDSS BOSS quasars
• The miniJPAS & J-NEP surveys: Identification and characterization of the Ly$\alpha$ Emitter population and the Ly$\alpha$ Luminosity Function
• Quasars in the Galactic Anti-Center Area from the LAMOST DR3
• The Seventeenth Data Release of the Sloan Digital Sky Surveys: Complete Release of MaNGA, MaStar and APOGEE-2 Data
• The miniJPAS Survey: Detection of double-core Lyα morphology of two high-redshift (z>3) QSOs
• A candidate quadruple AGN system at $z\sim 3$
• Ultra-low-frequency gravitational waves from individual supermassive black hole binaries as standard sirens
• Quasars Have Fewer Close Companions than Normal Galaxies
• The Qz5 Survey (I): How the HI Mass Density of the Universe Evolves With Cosmic Time
• Development of Hydrogen and Helium Proximity Zones around Quasars
• Primordial black hole detection through diffractive microlensing
• Kinematics of MgII Absorbers from the Redshift-space Distortion Around Massive Quiescent Galaxies
• Forecasts for Broadband Intensity Mapping of the Ultraviolet-Optical Background with CASTOR and SPHEREx
• Circumgalactic Ly$\alpha$ Nebulae in Overdense Quasar Pair Regions Observed with the Palomar Cosmic Web Imager
• The MEXSAS2 Sample and the Ensemble X-ray Variability of Quasars
• A measure of cosmological distance using the \civ\ Baldwin effect in quasars
• Origin of Metals around Galaxies I: Catalogs of Metal-line Absorption Doublets from High-Resolution Quasar Spectra
• Leaked Lya emission: an indicator of the size of quasar absorption outflows
• Discovery of two quasars at $z=5$ from the OGLE Survey
• Ultra-dense Broad-line Region Scale Outflow in Highly Reddened Quasar SDSS J145057.28+530007.6
• Automated Measurement of Quasar Redshift with a Gaussian Process
• Probing the rapid formation of black holes and their galaxy hosts in QSOs
• Spectral Signatures of Quasar Ages at z~3
• A cosmological distance measure using radio-loud quasars
• Analysis of interacting and isolated quasars
• Automated quasar continuum estimation using neural networks: a comparative study of deep-learning architectures
• Studying Quasar Absorber Host Galaxy Properties Using Image Stacking Technique
• Following the crumbs: Statistical effects of Ram Pressure in Galaxies
• A comparison of cosmological models with high-redshift quasars
• Submillimeter galaxy overdensities around physically associated quasar pairs
• Exploratory Study of Transverse Proximity Effect around BAL Quasars
• Cosmic magnification on high-redshift submillimeter galaxies
• The Effect of Interstellar Absorption on Measurements of the Baryon Acoustic Peak in the Lyman-α Forest
• Far-UV Fe Emission as Proxy of Eddington Ratios
• Applying Vision Transformers on Spectral Analysis of Astronomical Objects
• Filling in the Quasar Redshift Gap at $z\sim 5.5$ II: A Complete Survey of Luminous Quasars in the Post-Reionization Universe
• DESI Mg II Absorbers: Extinction Characteristics & Quasar Redshift Accuracy
• Prospects for constraining quasar ages with fiber spectrographs: quasar-induced Ly$\alpha$ emission from the intergalactic medium
• QUEST (Quasar Unsupervised Encoder and Synthesis Tool): A machine learning framework to generate quasar spectra
• A comparative study of ultraluminous infrared galaxies in the IRAS and SDSS Surveys
• Physical Drivers of Emission Line Diversity of SDSS Seyfert 2s and LINERs After Removal of Contributions by Star Formation
• Measurements of quasar proximity zones with the Ly$\alpha$ forest of DESI Y1 quasars
• The miniJPAS survey quasar selection I: Mock catalogues for classification
• Las Cumbres Observatory Gravitational-Wave Follow-up in the Third and Fourth Observing Runs: Strengths and Weaknesses of a Rapid Response Galaxy Targeted Strategy
• High-$z$ Universe probed via Lensing by QSOs (HULQ) II. Deep GMOS spectroscopy of a QSO lens candidate