English

The Half Million Quasars (HMQ) Catalogue

Astrophysics of Galaxies 2015-05-20 v1 Cosmology and Nongalactic Astrophysics

Abstract

A quasar catalogue is presented with a total of 510764 objects including 424748 type 1 QSOs and 26623 type 1 AGN complete from the literature to 25 January 2015. Also included are 25015 high-confidence SDSS-based photometric quasars with radio/X-ray associations, 1595 BL Lac objects, and 32783 type 2 objects. Each object is displayed with arcsecond-accurate astrometry, red and blue photometry, redshift, citations, and radio and X-ray associations where present. Also, 114 new spectroscopically confirmed quasars are presented.

Keywords

Cite

@article{arxiv.1502.06303,
  title  = {The Half Million Quasars (HMQ) Catalogue},
  author = {Eric W. Flesch},
  journal= {arXiv preprint arXiv:1502.06303},
  year   = {2015}
}

Comments

14 pages, 11 tables, 5 figures. Accepted for publication by Publications of the Astronomical Society of Australia (PASA)

R2 v1 2026-06-22T08:35:05.495Z