ADC/CDS Standard Document for Catalog:
/catalogs/3/3060/

IMPORTANT NOTICE:

Superseded      General Catalogue of S Stars (Stephenson 1976)
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General Catalogue of S Stars
    Stephenson C.B.
   <Publ. Warner & Swasey Obs. 2, No. 2 (1976)>
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ADC_Keywords: Stars, S

Description:
    The catalog is intended to list all S stars having known positions of
    at least roughly the precision of the Henry Draper Catalogue. An S
    star is a star in whose spectrum the bands of the ZrO molecule are
    detectable, ordinarily without needing sufficient spectral resolution
    to resolve the individual rotational lines of a band in its stronger
    parts. The majority of the stars in the catalog were classified on the
    basis of the band with a head near 6474 Angstroms, in the red system
    of ZrO. The catalog contains right ascension and declination
    (B1900.0), photographic, visual, or infrared magnitudes, spectral
    types, and designations that give the star's occurrence in various
    finding lists, including an unpublished one.

Nomenclature Note:
    There are three catalogues of S stars by Stephenson, each
    being numbered from 1. Care should therefore be taken to
    make a clear distinction between
    a) The present catalogue; these objects are designated  "GCSS"
    b) The second edition published in 1984 (catalog <III/168>)
       these objects are designated  "CSS"  (Compilation on
       galactic S stars), also available as Catalogue <III/168>
    c) A complement to the Second Edition published in 1990
       (=1990AJ....100..569S), designated by "CSS2"

See also:
   Superseded by catalog 3168 in 1991:
   3168 :  General Catalog of S Stars, second edition (Stephenson 1984)
   at URL ftp://adc.astro.umd.edu/pub/adc/archives/catalogs/3/3168


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