ADC/CDS Standard Document for Catalog:
/journal_tables/A+AS/100/517/

1. Use the ADC Data Viewer Suite to visualize the data.
2. Get the data files via anonymous FTP. (See Note.)

J/A+AS/100/517 CCD astrometry and instrumental Delta-V (van Dessel 1993)
================================================================================
CCD astrometry and instrumental Delta-V photometry of wide visual double stars.
III. Differential measurements of often observed southern pairs.
         van Dessel A., Sinachopoulos D.
         Astron. Astrophys. Suppl. Ser. 100, 517 (1993)
         =1993A&AS..100..517V
================================================================================
ADC_Keywords: Binaries, visual; Astrometric data; Photometry
Keywords: astrometry - visual double stars

Abstract:
   We present accurate relative positions and instrumental visual (Bessel V) 
   magnitude differences of southern wide star components. The mean accuracy 
   of the angular separation is 0.02 arcsecs, which corresponds to 1.5 micron 
   on the CCD chip, and of magnitude difference 0.007 mag/exposure. The 
   program pairs are targets of the HIPPARCOS mission and they have been 
   observed at least four times in the last 150 yrs.

File Summary:
--------------------------------------------------------------------------------
FileName     Lrecl    Records    Explanations
--------------------------------------------------------------------------------
ReadMe          80          .    This file
table1          80         91    The observations (epoch: 1992.5)
--------------------------------------------------------------------------------

Byte-by-byte Description of file: table1
--------------------------------------------------------------------------------
   Bytes Format  Units   Label    Explanations
--------------------------------------------------------------------------------
   2-  3  I2     h       RAh      right ascension 2000
   5-  8  F4.1   min     RAm      right ascension 2000
      10  A1     ---     DE-      declination sign
  11- 12  I2     deg     DEd      declination 2000
  14- 15  I2     arcmin  DEm      declination 2000
  17- 26  A10    ---     IDS      IDS19000 code of the double stars as listed
                                   in WDS (Worley and Douglass, 1984)
  28- 36  A9     ---     Durchm.  Durchmusterung designation of the primaries
  41- 42  A2     ---     Sp1      spectral type of the primary
  43- 44  A2     ---     Sp2      spectral type of the component B when known
  46- 49  F4.1   mag     mA       primary magnitude taken from the WDS
  51- 54  F4.2   mag     Delta-V  observed magnitude difference Delta-V
  56- 58  F3.2   mag   e_Delta-V  rms uncertainty on Delta-V
  60- 64  F5.2   arcsec  rho      angular separation
  66- 68  F3.2   arcsec  e_rho    rms uncertainty on rho
  70- 75  F6.2   deg     theta    position angle
  77- 80  F4.2   deg     e_theta  rms uncertainty on theta
--------------------------------------------------------------------------------

Courtesy: D. Sinachopoulos

References:
   Worley C.E. & Douglass G.G. 1984, The Washington Visual Double Star Catalog,
   Publ. U.S. Naval Obs. (magnetic tape)
================================================================================
(End)                                    Francois Ochsenbein [CDS]   07-Jan-1994