/ftp/cats/7/273



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VII/273            The Half Million Quasars (HMQ) catalogue       (Flesch, 2015)
The following files can be converted to FITS (extension .fit or fit.gz)
	hmq.dat refs.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=VII/273
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drwxr-xr-x 257 cats archive 8192 Feb 8 10:28 [Up] drwxr-xr-x 4 cats archive 315 Jan 12 2023 [TAR file] -rw-r--r-- 1 cats archive 468 Dec 19 2022 .message -r--r--r-- 1 cats archive 10555 Aug 29 2019 ReadMe -rw-r--r-- 1 cats archive 2675 Sep 9 2015 +footg5.gif -rw-r--r-- 1 cats archive 36838 Sep 9 2015 +footg8.gif -r--r--r-- 1 cats archive 15980855 May 12 2015 hmq.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 212832 Sep 9 2015 refs.dat [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : VII/273 The Half Million Quasars (HMQ) catalogue (Flesch, 2015) ================================================================================ The Half Million Quasars (HMQ) catalogue. Flesch E.W. <Pub. Astron. Soc. Australia 32, 10 (2015)> =2015PASA...32...10F =2015yCat.7273....0F ================================================================================ ADC_Keywords: QSOs ; Active gal. nuclei ; Redshifts ; Magnitudes Keywords: catalogs - quasars: general 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. Description: This is a compendium of all type-I QSOs and AGN, and BL Lac objects, complete from the literature to 25 January 2015. High-confidence (99%+) photometric SDSS candidates with radio/X-ray associations are included, plus type-II objects, which bring the total objects to 510764. Objects have been de-duplicated across source catalogs, and the earliest name and best redshift is presented for each. Astrometry is fixed onto a combined APM/USNO-B/SDSS optical background, and is accurate to within 1-2 arcsec in every case. Note: multiply-lensed images are listed as single objects. The catalog format is simple, each object is shown as one line bearing the J2000 coordinates, its name, red and blue optical magnitudes, PSF class, redshift, the citations for the name and redshift, plus up to four radio/X-ray identifiers where applicable. Questions/comments/praise/complaints may be directed to me at eric(at)flesch.org.