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II/41       4200-A CN Band and G Band in G8-K5 Spectra (Griffen+ 1960)
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Photoelectric Measurements of the 4200-A CN Band and the G Band in G8-K5 Spectra
    Griffin R.E., Redman R.O.
    <Mon. Not. R. Astron. Soc., 120, 287 (1960)>
    =1960MNRAS.120..287G
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ADC_Keywords: Photometry, CN band; Photometry, G band; Stars, late-type

Description:
   Measurements of the {lambda} 4200 A CN band are presented for 712 late-type
   stars.  G band data are also included for 212 of these stars. Mean errors
   of absolute magnitudes derived from CN intensities are at least 1.5 mag.
   Spectral type determined by G band intensity has a mean deviation of 0.15
   class from the MK type for G to K1 stars. The file photom.dat contains 712
   data records in the form of CN ratios and G-band ratios, with annotations.

   The CN ratio is the ratio of the sum of the intensities in the 4097-4149 A
   and 4230-4283 A wavelength ranges to the intensity in the 4164-4214 A
   range.  The latter contains the CN absorption band, and the first two ranges
   serve as nearby continuum references.  The ratio is a measure of the depth
   of the absorption in the CN band.  Values greater than 2 indicate absorption
   in the band.

   The G-band ratio is similarly the ratio of the sum of the intensities in the
   4230-4270 A and 4342-4380 A wavelength ranges to the intensity in the
   4285-4315 A range.

File Summary:
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 FileName       Lrecl  Records   Explanations
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ReadMe             80        .   This file
photom.dat         20      712   Catalog Data
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Byte-by-byte Description of file: photom.dat
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   Bytes Format  Units   Label    Explanations
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   1-  6  A6     ---     HD       Number of star in the Henry Draper Catalog (1)
   9- 11  I3     ---     CNratio  CN-band ratio (x100)
  14- 16  I3     ---     Gratio   G-band ratio (x100)
  19- 20  A2     ---     Notes    Notes to the entries (2)
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Note (1):
    In three instances, the star observed has no HD number and this
    column is left blank.  The star is identified in the fourth column.

Note (2):
    The following table provides the meaning of the characters in these
    columns.

        A  Dynamical space velocity greater than 80 km/s
        B  "4150"
        C  "Weak-CN"
        D  "Strong-line"
        E  "Weak-line"
        F  B.D +42.939 deg
        G  Composite spectrum, early-type companion
        H  Double, companion star only partly excluded by slit
	I  Star name:  49 Ser B
	J  Star name:  70 Oph B

    In the cases of all double stars not indicated with 'H', where the
    angular separation is less than 2 arcsec, the two stars have been
    measured together, and where the separation is more than 2 arcsec,
    the brighter component alone has been observed.

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(End)           Julie Anne Watko [SSDOO/ADC], Seth W. Digel [SSDOO]  25-Aug-1997