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J/A+AS/93/463    Astrometric catalog of Southern Dwarf Novae  (Bruch+ 1992)
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An astrometric catalogue of southern and equatorial dwarf novae
     Bruch A., Meijer J., Naumann M., Schimpke T., Ungruhe R., Vogt N.
    <Astron. Astrophys. Suppl. Ser. 93, 463 (1992)>
    =1992A&AS...93..463B
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ADC_Keywords: Binaries, cataclysmic; Atlases; Positional data
Keywords: Catalogues - Stars: binaries: close - Stars: variable: cataclysmic

Abstract:
    An astrometric catalog of 116 southern and equatorial dwarf novae is
    presented. The mean internal accuracy of the coordinates is of the
    order of +/- 0.025 s in alpha cos delta and +/- 0.3 arcsec in delta.


File Summary:
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 FileName        Lrecl       Records    Explanations
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ReadMe              80             .    This file
table1.dat          80           116    The catalogue
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See also:
    J/A+AS/70/481 : (Northern Part)

Byte-by-byte Description of file: table1.dat
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   Bytes Format  Units   Label    Explanations
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   2- 16  A15    ---     Name     variable star name.
  18- 19  I2     h       RAh      Right Ascension 1950 (hours)
  21- 22  I2     min     RAm      Right Ascension 1950 (minutes)
  24- 28  F5.2   s       RAs      Right Ascension 1950 (seconds)
      30  A1     ---     DE-      Declination 1950 (sign)
  31- 32  I2     deg     DEd      Declination 1950 (degrees)
  34- 35  I2     arcmin  DEm      Declination 1950 (minutes)
  37- 40  F4.1   arcsec  DEs      Declination 1950 (seconds)
  42- 46  F5.3   s     e_RAs      ? formal (internal) mean error of the
                                   measurements at the plate location of the
                                   variable star as derived from the least
                                   squares solution to the position of the
                                   standard stars in right ascension
                                   (multiplied by cos(delta)) in seconds of
                                   time. (1)
  48- 51  F4.2   arcsec  e_DEs    ? formal (internal) mean error in declination
                                   in seconds of arc. (1)
  53- 59  F7.2   yr      Epoch    ? epoch of the coordinates. (2)
  61- 64  A4     ---     Source   the type of the plate on which the positions
                                   were measured, or source of the measurements:
                                  L = Lopez (1985, IBVS 2837)
                                  W = Williams (1983, ApJS 53, 523)
                                  K = Kiplinger (1985, IBVS 2488)
                                   Other abbreviations are self-explanatory.
  66- 72  A7     ---     RefCat   Source catalogue for the reference stars.
                                   In most cases the AGK3 or the PPM catalogue
                                   could be used. However, for some fields we
                                   had to use the SAO catalogue which has a
                                   somewhat inferior accuracy.
  74- 76  I3     ---     Nref     ? Number of reference stars for the coordinate
                                   determination (only for our own measurements)
  78- 80  A3     ---     Rem      a code for remarks (3)
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Note (1): Since Lopez (1985, IBVS 2837) and Williams (1983, ApJS 53, 523)
      do not quote errors for their measurements no corresponding information
      can be given for coordinates taken from their publications.
Note (2): Since the exact date of the exposures of the SRC plates is not
      known, we give a mean epoch of 1980 for the corresponding coordinates.
      Similarly, we do not know the epoch of Lopez's (1985, IBVS 2387))
      plates. Therefore, we cannot give values in these cases.
Note (3): Code as:
           1. The position could not be determined by a Gaussian fit
              to the stellar image because of close, brighter
              neighbours. Instead, the position was found by locating
              the centre of gravity of the stellar image visually.
           2. There is a difference of more than 5.5 arcsec in right
              ascension to the position of Lopez (1985, IBVS 2837).
           3. On the POSS chart the star is a member of an unresolved
              group of stars. The position refers to the centre of a
              Gaussian fitted to this group.
           4. Mean values from positions measured on three plates.
           5. NN Cen is the northern component of a close optical pair
              which is not resolved on the chart of Vogt and Bateson
              (1982, A&AS 48, 383).
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(End)                                    Francois Ochsenbein [CDS]   13-Apr-1993