The Million Quasars (Milliquas) catalog (6.3) : VII/283

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Authors : Flesch E.W. orcid (hide) et..al

VizieR DOI :
Bibcode : 2015PASA...32...10F (ADS) (Simbad) (Objects)
2019yCat.7283....0F (ADS) (Simbad) (Objects)
(hide)

CDS Keywords : QSOs; Active gal. nuclei; Redshifts; Magnitudes
UAT : Quasars, Active galactic nuclei, Redshifted, Apparent magnitude

Compilation (CCC)

Records : 1986800 QSOs

Inserted into VizieR : 12-Jul-2019
Last modification : 02-Jun-2021

The Million Quasars (MILLIQUAS) catalogue, version 6.3. (2019)

Keywords : catalogs - quasars general

Abstract:This is a compendium of 623,004 type-I QSOs and AGN, largely complete from the literature to 15 June 2019 including SDSS-DR15 and LAMOST QSO DR5. Also included are approx 1.32M high-confidence (80%+ likelihood) quasar candidates from the NBCKDE, NBCKDE-v3, AllWISE, XDQSO & Peters photometric quasar catalogs (citations in Note 7 below) and from all-sky radio/X-ray associated objects which are calculated here. Type-II and Bl Lac objects are also included, plus galaxies with double radio lobes, bringing the total count to 1,986,800. Gaia-DR2 astrometry is used where available, amounting to ~63% of all objects. Changes from version 6.2 are: ...(more)
Abstract: (hide)
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If using this catalogue in published research, please so cite. The confirmed quasars of this catalog (to Jan 2015) were published as the Half Million Quasars (HMQ) catalog: Flesch E., 2015PASA...32...10F, which can be used as the citation. Note however that Milliquas uses optical sky data from 2017PASA...34...25F whereas the HMQ used optical sky data from 2004A&A...427..387F, Cat. J/A+A/427/387, Appendix A. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory,California Institute of Technology, under contract with the National Aeronautics and Space Administration. This research has made use of the SIMBAD database and cross-match service (to obtain Gaia DR2 data) provided by CDS, Strasbourg, France.

                


                

                    

                


                

                    

                


                

                    
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