The CatSouth Quasar Candidate Catalog for the Southern Sky and a Unified All-Sky Catalog Based on Gaia DR3
arXiv:2503.14141 · doi:10.3847/1538-4365/ade999
Abstract
The Gaia DR3 has provided a large sample of more than 6.6 million quasar candidates with high completeness but low purity. Previous work on the CatNorth quasar candidate catalog has shown that including external multiband data and applying machine-learning methods can efficiently purify the original Gaia DR3 quasar candidate catalog and improve the redshift estimates. In this paper, we extend the Gaia DR3 quasar candidate selection to the southern hemisphere using data from SkyMappper, CatWISE, and VISTA surveys. We train an XGBoost classifier on a unified set of high-confidence stars and spectroscopically confirmed quasars and galaxies. For sources with available Gaia BP/RP spectra, spectroscopic redshifts are derived using a pre-trained convolutional neural network (RegNet). We also train an ensemble photometric redshift estimation model based on XGBoost, TabNet, and FT-Transformer, achieving an RMSE of 0.2256 and a normalized median absolute deviation of 0.0187 on the validation set. By merging CatSouth with the previously published CatNorth catalog, we construct the unified all-sky CatGlobe catalog with nearly 1.9 million sources at , providing a comprehensive and high-purity quasar candidate sample for future spectroscopic and cosmological investigations.
arXiv comment21 pages, 7 figures, 4 tables, published in ApJS. The catalogs (CatSouth, and CatGlobe) can be downloaded in https://nadc.china-vo.org/res/r101575/
References in corpus (80)
- XGBoost: A Scalable Tree Boosting System
- Astropy: A Community Python Package for Astronomy
- The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
- The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
- HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
- The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
- Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies
- Gaia Data Release 3: Summary of the content and survey properties
- Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
- Energy input from quasars regulates the growth and activity of black holes and their host galaxies
- The 2dF Galaxy Redshift Survey: Spectra and redshifts
- SDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems
- The Baryon Oscillation Spectroscopic Survey of SDSS-III
- EAZY: A Fast, Public Photometric Redshift Code
- Overview of the DESI Legacy Imaging Surveys
- Accurate photometric redshifts for the CFHT Legacy Survey calibrated using the VIMOS VLT Deep Survey
- Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
- The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra
- An 800-million-solar-mass black hole in a significantly neutral Universe at redshift 7.5
- The 6dF Galaxy Survey: Final Redshift Release (DR3) and Southern Large-Scale Structures
- VISTA Variables in the Via Lactea (VVV): The public ESO near-IR variability survey of the Milky Way
- Preliminary Results from NEOWISE: An Enhancement to the Wide-field Infrared Survey Explorer for Solar System Science
- UltraVISTA: a new ultra-deep near-infrared survey in COSMOS
- Mid-Infrared Selection of AGN with the Wide-Field Infrared Survey Explorer. I. Characterizing WISE-Selected AGN in COSMOS
- astroquery: An Astronomical Web-Querying Package in Python
- Gaia Early Data Release 3: Photometric content and validation
- An ultra-luminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30
- The 2MASS Redshift Survey - Description and Data Release
- The Assembly of the First Massive Black Holes
- The 2dF QSO Redshift Survey - XII. The spectroscopic catalogue and luminosity function
- SkyMapper and the Southern Sky Survey
- The Sloan Digital Sky Survey Quasar Catalog: Sixteenth Data Release
- The Optical to Mid-Infrared Extinction Law Based on the APOGEE, Gaia DR2, Pan-STARRS1, SDSS, APASS, 2MASS and WISE Surveys
- A Catalog of Broad Absorption Line Quasars from the Sloan Digital Sky Survey Third Data Release
- SkyMapper Southern Survey: First Data Release (DR1)
- unWISE: unblurred coadds of the WISE imaging
- The VISTA Deep Extragalactic Observations (VIDEO) Survey
- The VMC Survey - I. Strategy and First Data
- The Early Data Release of the Dark Energy Spectroscopic Instrument
- The CatWISE2020 Catalog
- The Sloan Digital Sky Survey Data Release 7 Spectroscopic M Dwarf Catalog I: Data
- The Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V
- The 2dF-SDSS LRG and QSO Survey: the QSO luminosity function at 0.4<z<2.6
- SkyMapper Southern Survey: Second Data Release (DR2)
- The WISE AGN Catalog
- Project Overview of the Beijing-Arizona Sky Survey
- Gaia Data Release 2: The Celestial reference frame (Gaia-CRF2)
- A Catalog of Quasar Properties from Sloan Digital Sky Survey Data Release 16
- The VISTA ZYJHKs Photometric System: Calibration from 2MASS
- SDSS quasars in the WISE preliminary data release and quasar candidate selection with optical/infrared colors
- The Million Quasars (Milliquas) Catalogue, v8
- Luminous K-band Selected Quasars from UKIDSS
- Gaia Data Release 3: The extragalactic content
- SkyMapper Filter Set: Design and Fabrication of Large Scale Optical Filters
- Gaia Data Release 1: The reference frame and the optical properties of ICRF sources
- Quaia, the Gaia-unWISE Quasar Catalog: An All-Sky Spectroscopic Quasar Sample
- Quasar candidate selection and photometric redshift estimation based on SDSS and UKIDSS data
- The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: the 4th and 5th Data Release
- Second Data Release of the All-sky NOIRLab Source Catalog
- Efficient Selection of Quasar Candidates Based on Optical and Infrared Photometric Data Using Machine Learning
- The Extremely Luminous Quasar Survey (ELQS) in the SDSS footprint I.: Infrared Based Candidate Selection
- Gaia Data Release 3: A Golden Sample of Astrophysical Parameters
- Stellar parametrization of LAMOST M dwarf stars
- The Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Release Two and Three
- The Next Generation Virgo Cluster Survey. XXXIV. Ultra-Compact Dwarf (UCD) Galaxies in the Virgo Cluster
- The Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Release Six to Nine
- A Uniformly Selected, All-Sky, Optical AGN Catalog
- The Large Sky Area Multi-Object Fiber Spectroscopic Telescope Quasar Survey: Quasar Properties from First Data Release
- Finding Quasars behind the Galactic Plane. I. Candidate Selections with Transfer Learning
- Finding the brightest cosmic beacons in the Southern Hemisphere
- The Third Data Release of the Beijing-Arizona Sky Survey
- First Data Release of the All-sky NOAO Source Catalog
- The spectroscopic follow-up of the QUBRICS bright quasar survey
- The Second Data Release of the Beijing-Arizona Sky Survey
- CatNorth: An Improved Gaia DR3 Quasar Candidate Catalog with Pan-STARRS1 and CatWISE
- A Southern Photometric Quasar Catalog from the Dark Energy Survey Data Release 2
- Finding Quasars behind the Galactic Plane. II. Spectroscopic Identifications of 204 Quasars at
- Quasar and galaxy classification using Gaia EDR3 and CatWise2020
- AllBRICQS: the All-sky BRIght, Complete Quasar Survey
- Efficient Identification of Broad Absorption Line Quasars using Dimensionality Reduction and Machine Learning