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III/42              Selected MK Spectral Types    (Jaschek, 1978)
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Catalogue of selected spectral types in the MK system
     Jaschek M.
    <Bull. Inform. CDS 15, 121 (1978)>
    =1978BICDS..15..121J
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ADC_Keywords: MK spectral classification ; Spectral types

Description:
    The catalog provides a single spectral type for each star listed in
    the La Plata catalog (Jaschek, Conde and de Sierra 1964; catalog
    <III/18>) and in the MK Extension (Kennedy 1978; see catalog
    <III/78>). In all cases the classifications are selected from those in
    the literature and have not been made by the author specifically for
    this compilation. A selected classification is considered to be the
    best one but is not necessarily a good one. If only one classification
    exists for a given object, it is given, regardless of its quality.

    The classifications were selected using a weighting system, with
    highest weight being given to classifications made by Morgan and/or
    Keenan, somewhat lower weight to those made by other spectral
    classification experts and various lower weights to those made by
    other workers. Classifications using designations that do not appear
    in the MK system have been excluded, as have objective-prism
    classifications, except where no slit spectra were available.

    The catalog contains a running number in one of the original catalogs
    (sequential numbers in the machine versions), identification of the
    original catalog, star identification (HD, DM, miscellaneous
    designations), equatorial coordinates (B1900), magnitude, V if
    available, m(v) otherwise) for reference purposes, reference number in
    the original catalog, selected classification, dispersion information,
    and standardized reference.

File Summary:
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 FileName   Lrecl    Records    Explanations
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ReadMe         80          .    This file
catalog       114      30361    The catalog of Selected MK Types
refs          120       1029    The References
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Byte-by-byte Description of file: catalog
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   Bytes Format Units   Label     Explanations
--------------------------------------------------------------------------------
   1-  5  I5    ---     Number    Running number in one of the original
                                     catalogues
       7  A1    ---     cat      *[JK] Original catalogue: J or K
   9- 19  A11   ---     Name      Identification of the star (generally
                                     HD or DM number)
  22- 23  I2    h       RAh       Right Ascension 1900 (hours)
  25- 28  F4.1  min     RAm       Right Ascension 1900 (minutes)
      30  A1    ---     DE-       Declination 1900 (sign)
  31- 32  I2    deg     DEd       Declination 1900 (degrees)
  34- 35  I2    arcmin  DEm       Declination 1900 (minutes)
  38- 42  F5.2  mag     Vmag     *? V magnitude
      43  A1    ---     n_Vmag    [V] 'V' for variability
  45- 48  A4    ---     MK        Source and number of available MK types
  50- 52  I3    ---     Ref       Reference number in the original catalogue
  54- 77  A24   ---     SpType    Selected spectral classification
  79- 85  A7    10-7    Disp     *Dispersion used (in Angstroem/mm) for
                                      the selected classification
  87- 94  A8    ---     RefCode   Bibliographical coded Number, used for
                                      the BSI (Spite et al., 1980)
  96-114  A19   ---     BibCode   Standardized bibliographical code
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Note on cat:
  (J)   La Plata Catalog of Stellar Spectra Classified in the
        MK System, by Jaschek et al. (1964, catalog <III/18>)
  (K)   MK Classification Extension by Kennedy P.M. (kept up-to-date;
        latest version available is <III/78>)
Note on Vmag:
  The value 99.99 = nebular? (Star #3542)
Note on Disp: the dispersion is followed by abbreviations for the
   dispersive system used:
   OP = Objective Prism ; P = Prism ;
    G = Grating
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Byte-by-byte Description of file: refs
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   Bytes Format  Units   Label    Explanations
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   1-  8  A8     ---     RefCode  [.0-9] Bibliographical Reference Code
                                         (repeated if several lines)
   9-120  A112   ---     Text     Text of Reference
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Historical Notes:
   The original version contained vertical bars as separators, and a few
   control characters. There were removed at ADC, and the standardized
   BibCode, as used by SIMBAD, was added at CDS.

References:
   Jaschek C., Conde H., and de Sierra A.C. 1964, Catalogue of Stellar
      Spectra Classified in the Morgan-Keenan System, Publ. La Plata Obs.,
      Ser. Astron. 28 (2)
   Kennedy P.M. 1978, MK Classification Extension, Mt. Stromlo Observatory
   Spite F., Kirchner S., Lahmek R., and Ochsenbein F. 1980, Bull. Inform.
      CDS No. 18, p. 89
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(End)       Julie Anne Watko [SSDOO/ADC], Francois Ochsenbein [CDS]  11-May-1996