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J/MNRAS/259/563      Double star CCD observations                  (Argue+ 1992)
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Double star CCD astrometry and photometry
     Argue A.N., Bunclark P.S., Irwin M.J., Lampens P., Sinachopoulos D.,
     Wayman P.A.
    <Mon. Not. R. Astron. Soc. 259, 563 (1992)>
    =1992MNRAS.259..563A
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ADC_Keywords: Stars, double and multiple ; Positional data; Photometry
Keywords: techniques: image processing - astrometry - binaries: close -
          binaries: visual

Abstract:
   Results are presented for angular separation, position angle and V and R 
   photometry for 2373 binary stars, obtained with the CCD camera on the 1-m 
   Jacobus Kapteyn Telescope at La Palma. The stars are part of the Input 
   Catalogue of the Hipparcos Astrometric Satellite launched in 1989 August, 
   and the purpose of our measurements is to assist in the satellite reductions.
   The A-components of the binaries have V magnitudes in the range 8 to 12 mag,
   and A-B angular separations (rho) 0.5-30 arcsec with the majority in the 
   range 0.5-5 arcsec. The internal consistency achieved for the photometry is
   less than 0.01 mag for components of nearly equal brightness, deteriorating
   to 0.1 mag for Delta(v) of about 4 mag. For the astrometry, the internal 
   consistency for rho varies between 0.01 and 0.1 arcsec, being worse for 
   small separation and large Delta(v).

File Summary:
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 FileName        Lrecl       Records    Explanations
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ReadMe              80             .    This file
table6.dat          84          1064    v >= 9 mag. and rho < 5"
table7.dat          84           346    v >= 9 mag. and rho >= 5 "
table8.dat          84           729    8 <= v < 9 mag. and rho < 5 "
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Byte-by-byte Description of file: table6.dat, table7.dat, table8.dat
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   Bytes Format  Units   Label    Explanations
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   1-  4  I4     ---     Nr       an internal number
   6- 15  A10    ---     IDS      Identification in the "Catalogue of the
                                    Components of Double and Multiple stars"
                                    (CCDM, Dommanget 1985; equinox 1900)
  17- 24  A8     ---     Name     Double star designation
  26- 32  F7.2   yr      t        Epoch of observation;
  34- 36  I3     deg     theta    []? Position angle of component B
                                   relative to A (N through E);
  38- 42  F5.2   arcsec  rho      []? Angular separation rho of A,B
  44- 48  F5.2   arcsec  d        []? Distance between the two positions
                                   derived for B relative to A, giving an
                                   estimate of the precision
  50- 54  F5.2   mag     mvA      Apparent V magnitude of the A component
  56- 60  F5.2   mag     mvB      []? Apparent v magnitude of the B component
  62- 63  I2  0.1arcsec  sv       FWHM of the derived PSF for the v images
                                    (see 3; unit 0.1 arcsec);
  65- 69  F5.2   mag     mrA      Apparent R magnitude of the A component;
  71- 75  F5.2   mag     mrB      []? apparent R magnitude of the B component
  77- 78  I2  0.1arcsec  sR       []? FWHM of the derived PSF for the
                                    R magnitude
  80- 84  F5.3   mag     SD_V     []? Standard deviation of a V magnitude as
                                    determined by the Carlsberg Automatic
                                    Meridian Circle on the mountain. No data
                                    are available for Star No. 4451.
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Historical Notes:
    19-Feb-1993 Version
    31-Jan-1993: removed the LaTeX files from "File Summary", and
                 modified the Byte-per-byte Description for NULL values
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(End)                                    Francois Ochsenbein [CDS]   31-Jan-1993