The Half Million Quasars (HMQ) Catalogue

By E. Flesch. Publications Astronomical Society of Australia, 2015

141 citations recorded by the source corpus.

Abstract A quasar catalogue is presented with a total of 510 764 objects including 424 748 type 1 QSOs and 26 623 type 1 AGN complete from the literature to 2015 January 25. 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.

Subfields: Astronomy and Astrophysics, Electrical and Electronic Engineering, Instrumentation

View Paper: https://www.semanticscholar.org/paper/7024b73fe8ee8c3d51ca61f8ef2e2075d4e64de2

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Citations in the corpus

The SUrvey for Pulsars and Extragalactic Radio Bursts – II. New FRB discoveries and their follow-up. (2017, background): “1−301152 from the ‘Half a Million Quasar Survey’ (Flesch 2015) at z = 1.6.”
The Final Season Reimagined: 30 Tidal Disruption Events from the ZTF-I Survey (2022, methodology): “We filtered known AGN using the Million Quasars catalog (Flesch 2015, v. 5.2) and constructed neoWISE (Mainzer et al. 2011) light curves to reject any galaxy with significant variability or a mean W1−W2 color consistent with the AGN threshold of Stern et al. (2012).”
IDENTIFICATION OF 1.4 MILLION ACTIVE GALACTIC NUCLEI IN THE MID-INFRARED USING WISE DATA (2015, background): “13 http://quasars.org/milliquas.htm 14 MILLIQUAS includes the Half Million Quasars (HMQ) Catalogue (Flesch 2015), but the latter excludes candidate AGNs/QSOs.”
A Population of Short-Period Variable Quasars from PTF as Supermassive Black Hole Binary Candidates (2016, background): “We 5 This is a subsample of the Million Quasar Catalogue v.4.4; https://heasarc.gsfc.nasa.gov/W3Browse/all/milliquas. html (HMQ; Flesch 2015) 6 We search for binaries with periods of several weeks.”
Active galactic nuclei: what’s in a name? (2017, background): “…of the largest-area photometric and spectroscopic quasar samples is only ∼150 deg−2, but over a large fraction of the sky, which results in larger samples of AGN overall (e.g. Richards et al. 2009b; D’Abrusco et al. 2009; Bovy et al. 2011; Flesch 2015; Brescia et al. 2015; Pâris et al. 2017).”