Astronomical Data Center

ADCADC/CDS Standard Document for Catalog:
/catalogs/2/2046/

The following is the "ReadMe" document that describes this ADC catalog.

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II/46       Strong Cyanogen Stars, Table 1, Table 4 (McClure 1970)
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A Photometric Investigation of the Strong Cyanogen Stars, Table 1: Bright
Calibration Stars; Table 4: Strong Cyanogen Stars
    McClure R.D.
    <Astron. J., 75, 41 (1970)>
    =1970AJ.....75...41M
================================================================================
ADC_Keywords: Photometry, CN band; Colors; Stars, cyanogen

Description:
   A cyanogen index for late-type giants, insensitive to surface gravity but 
   sensitive to metallicity, is presented in the David Dunlap Observatory (DDO)
   photometric system. Observations were made using conventional single-channel
   photometers with 1P21 photomultiplier tubes on the 40cm and 90cm telescopes
   of Kitt Peak National Observatory. The original DDO filter set C was used
   (Paper I). Table 1 contains DDO photometry on 52 bright late-type giants for
   calibration. Most G8 to M10 stars, luminosity class III, V < 4.0mag, north
   of DE -10deg, supplement the original stars from Paper I. Table 4 includes
   both DDO and UBV photometry for stars from Schmitt (1967) and Spinrad and
   Taylor (1969). Reddening values were computed using the method of McClure
   and Racine (1969). Data files include headers describing the file contents.

File Summary:
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 FileName       Lrecl  Records   Explanations
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ReadMe             80        .   This file
tbl1.dat           88       75   Table 1 Bright Calibration Stars
tbl4.dat           88      154   Table 4 Strong-Cyanogen Stars
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Byte-by-byte Description of file: tbl1.dat
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   Bytes Format  Units   Label    Explanations
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   1-  n  In     ---     ---      ---
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Byte-by-byte Description of file: tbl4.dat
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   Bytes Format  Units   Label    Explanations
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   1-  n  In     ---     ---      ---
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References:
   McClure R.D. & Bergh S. van den 1968, Astron. J., 73, 313. Paper I.
   McClure R.D. & Racine R. 1969, Astron. J., 74, 1000.
   Schmitt J. 1967, thesis, U. Michigan, Ann Arbor, Michigan.
   Spinrad H. & Taylor B. 1967, Astron. J., 72, 320.
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(End)                                  Julie Anne Watko [SSDOO/ADC]  13-MAY-1996
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