Astronomical Data Center

ADCADC/CDS Standard Document for Catalog:
/catalogs/3/3029B/

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

This catalog does not currently have a complete standard document. The ADC data viewer will not work for catalogs without standard documents.

You can access the files described here from the anonymous FTP directory:
   ftp://adc.astro.umd.edu/pub/adc/archives/catalogs/3/3029B/. 

III/29B     H Gamma Measures of R. M. Petrie (Crampton, Leir, Younger 1973)
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A Catalogue of H Gamma Measures of R. M. Petrie
    Crampton D., Leir A.A., Younger F.
    <Publ. Dom. Astrophys. Obs. 14, 151 (1973)>
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ADC_Keywords: Photometry, H-gamma

Description:
   The catalog is a compilation of equivalent widths of H-gamma for early-type
   stars, not only from published material but also from the numerous card
   files kept by R.M.  Petrie.  The luminosities of early-type stars through
   the measurement of the equivalent width of H-gamma are relatively precise,
   although the early work was hampered by systematic errors in the absolute-
   magnitude calibrations.  In a number of cases, the values of the equivalent
   width for a given star differ slightly from publication to publication.
   There are three possible reasons for this:  1) The later publications may
   include measurements of additional spectra; 2) in some cases the values
   were included in the average; 3) some initial measures had not included the
   extremities of the very extensive wings of H-gamma in the spectra of A
   stars.

File Summary:
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 FileName       Lrecl  Records   Explanations
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ReadMe             80        .   This file
data_01.dat        80     1171   Catalog Data
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Byte-by-byte Description of file: data_01.dat
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   Bytes Format  Units   Label    Explanations
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   1-  n  In     ---     ---      ---
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(End)                                 Gail L. Schneider [SSDOO/ADC]  25-Sep-1995
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