The Million Quasars (Milliquas) catalogue, version 4.4 (25 January 2015)

MILLIQUAS v4.4 includes data up to 25 January 2015, including SDSS-DR12 and SDSS-DR12Q ( 1,116,350 type-I objects are displayed, including 425079 QSOs from the literature (type I only), 26008 AGN (like quasars but extended, e.g., Seyferts), 1595 Bl Lacs, 612204 photometric quasars from SDSS-based NBCKDE and BOSS, and 53059 radio/X-ray associated QSO candidates. Radio and/or X-ray identifications are shown where applicable, plus, for the photometric and radio/X-ray associated candidates, the probability of each being a true quasar. The threshold for inclusion of candidates is 80% QSO-likelihood.

Quick browse of (flat text) data here , and here is the ReadMe

Get the file (40Mb with references list) here in FITS or as  flat text .



Stars & Galaxies, radio/X-ray associated -- 22 November 2014

Milliquas is extracted from a larger database which includes stars & galaxies associated to radio/X-ray detections at 80%+ confidence. The counts are 191485 known galaxies and candidate galaxies (80%+ confidence), 14274 known stars and candidate stars (80%+ confidence), and 104414 candidates of unclear classification, although most of them will be galaxies.

I have made tables for each of these in the same layout as Milliquas, plus a table of extra references (citations) for them, all in a 12 Mb zipped file here in FITS or as flat text .

Legend of object classifications: G=galaxy, g=LRG, H=starburst, L=LINER, M=group, N=NELG,S=star, W=WD, C=CV. The percentage column shows the confidence that the radio/X-ray detection is truly associated to this object.

The Atlas of Radio/X-ray Associations (ARXA, 2010 PASA, 27, 283) is here.


Eric Flesch, last updated 25 January 2015