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J/A+AS/122/559      uvby-beta CCD photometry secondary standard (Clausen+ 1997)
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Secondary standard stars for uvby-beta CCD photometry
     Clausen J.V., Larsen S.S., Garcia J.M, Gimenez A., Storm J.
    <Astron. Astrophys. Suppl. Ser. 122, 559 (1997)>
    =1997A&AS..122..559C      (SIMBAD/NED BibCode)
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ADC_Keywords: Photometry, standards ; Photometry, uvby, beta
Keywords: Stromgren photometry - astronomical data bases: miscellaneous -
          stars: fundamental parameters - stars: general

Abstract:
    Accurate standard uvby indices are presented for 73 southern B, A, F
    and G stars in the V magnitude range 8.2 to 10.9. They cover all three
    transformation regions of the uvby system (Olsen 1983A&AS...54...55O)
    well. Standard {beta} indices are included for the 55 B, A, and F
    stars in the sample. Our results provide a useful set of secondary
    standards for uvby {beta} CCD photometry with southern hemisphere 1-2m
    class telescopes. A critical comparison with published photometry, in
    general based on fewer observations, is given.

File Summary:
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  FileName      Lrecl  Records   Explanations
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ReadMe             80        .   This file
table3             80       71   Catalogue of transformed uvby indices for the
                                  observed primary standard stars.
table4             28       39   Catalogue of transformed beta indices for the
                                  observed primary standard stars.
table5             92       73   Catalogue of observed secondary standard stars
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Byte-by-byte Description of file: table3
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   Bytes Format Units      Label    Explanations
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   1-  6  I6    ---        HD       HD (Cat. <III/135>) number
       8  A1    ---        T        [ADG] uvby transformation region:
                                           A (BAF),D (GKV), G (GKIII)
  10- 11  I2    ---      o_Vmag     Number of observations
  13- 17  F5.3  mag        Vmag     V magnitude
  19- 23  F5.3  mag      e_Vmag     rms uncertainty on Vmag
  25- 30  F6.3  mag        b-y      b-y color index
  32- 36  F5.3  mag      e_b-y      rms uncertainty on b-y
  38- 43  F6.3  mag        m1       m1 color index
  45- 49  F5.3  mag      e_m1       rms uncertainty on m1
  51- 56  F6.3  mag        c1       c1 color index
  58- 62  F5.3  mag      e_c1       rms uncertainty on c1
  64- 66  I3    10-3mag    dVmag    Standard - transformed V magnitude value
  68- 70  I3    10-3mag    db-y     Standard - transformed b-y color index value
  72- 74  I3    10-3mag    dm1      Standard - transformed m1 color index value
  76- 78  I3    10-3mag    dc1      Standard - transformed c1 color index value
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Byte-by-byte Description of file: table4
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   Bytes Format Units     Label     Explanations
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   1-  6  I6    ---       HD        HD number
       8  A1    ---       T         [AB] Transformation region
  10- 11  I2    ---     o_Beta      Number of observations
  13- 17  F5.3  mag       Beta      Beta color index
  19- 23  F5.3  mag     e_Beta      rms uncertainty on Beta
  25- 26  I2    10-3mag   dBeta     Standard - transformed Beta value
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Byte-by-byte Description of file: table5
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   Bytes Format Units   Label   Explanations
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   1-  9  A9    ---     HD/CPD  HD or CPD name
  11- 14  A4    ---     ID      E-region identification (Cousins & Stoy
                                  1962RGOB...49....3C),
  16- 17  A2    ---     T       uvby (A,D,G) & beta (A,B) transformation regions
  19- 20  I2    ---   o_Vmag    Number of observations in Vmag
  22- 23  I2    ---   o_b-y     Number of observations in uvby
  25- 26  I2    ---   o_Beta    ? Number of observations in Beta
  28- 33  F6.3  mag     Vmag    V magnitude
  35- 39  F5.3  mag   e_Vmag    rms uncertainty on Vmag
  41- 46  F6.3  mag     b-y     b-y color index
  48- 52  F5.3  mag   e_b-y     rms uncertainty on b-y
  54- 58  F5.3  mag     m1      m1 color index
  60- 64  F5.3  mag   e_m1      rms uncertainty on m1
  66- 71  F6.3  mag     c1      c1 color index
  73- 77  F5.3  mag   e_c1      rms uncertainty on c1
  79- 83  F5.3  mag     Beta    ? Beta color index
  85- 89  F5.3  mag   e_Beta    ? rms uncertainty on Beta
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Acknowledgements: Jens Viggo Clausen <jvc@astro.ku.dk>
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(End)                                         Patricia Bauer [CDS]   05-Sep-1996