Astronomical Data Center

ADCADC/CDS Standard Document for Catalog:
/catalogs/7/7146/

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IMPORTANT NOTICE:

In 1993, this catalog was superseded by catalog 7166 . See:
/catalogs/7/7166/ .

If you still wish to access this catalog, go to:
ftp://adc.astro.umd.edu/pub/adc/superseded/7/7146/ .

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The following is an abbreviated "ReadMe" document that describes this ADC catalog.
Superseded     Quasars and Acive Nuclei, 5th Edition (Veron-Cetty+ 1991)
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A Catalogue of Quasars and Active Nuclei, 5th Edition
    Veron-Cetty, M.-P. and Veron, P.
    <ESO Sci. Rep. No. 10 (1991)>
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ADC_Keywords: Active gal. nuclei ; BL Lac objects ; QSOs

Description:
   This catalog is an update to the older catalog of quasars and active
   nuclei. It now contains 6298 quasars and 1540 active galaxies (of which
   757 are Seyfert 1, as compared to 4169 quasars and 1108 Seyfert and
   related galaxies in the fourth edition of this catalog.  This catalog
   contains positions, redshift, photometry (U, B, V), and 6 and 11 cm flux
   densities.  This catalog also contains 162 BL Lac objects as opposed to
   117 in the last edition.  A quasar is arbitrarily defined as a star-like
   object or an object with a star-like nucleus, brighter than absolute
   magnitude -23.  This catalog is believed to be complete for quasars,
   BL Lac objects, and Seyfert 1 galaxies.

See also:
   Superseded by catalog 7166 in 1993:

   7166: Quasars and Active Galactic Nuclei (6th Ed.) (Veron+ 1993)
   at URL ftp://adc.astro.umd.edu/pub/adc/archives/catalogs/7/7166


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