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VII/168             Double Galaxies in SGP region  (Zou+, 1989)
Catalogue of Double Galaxies in the region of Southern Galactic Cap
     Zou Zhenlong, Chen Jiansheng, Tang Xiaoying, Bian Yulin
    <Bull. Inf. CDS 37, 173 (1989)>
    =1989BICDS..37..173Z
Catalogue of double galaxies in the South Galactic Cap
     Zou Zhenlong, Chen Jiansheng, Tang Xiaoying, Bian Yulin
    <Publ. of the Beijing Astron. Observatory, 12, 8 (1989)>
    =1989PBeiO..12....8Z
ADC_Keywords: Galaxy catalogs


Description:
    630 double systems of galaxies brighter than about 17mag(B) were found
    by examining  100 glass copies  of ESO(B) survey  plates, covering the
    Southern Galactic Cap (GLAT←50deg, DE←27deg). The selection criteria
    are similar to those defined by Zonn (1962).
    The measuring, reduction  and  error  analysis  parameters  have  been
    described by Zou et al. (1984).

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
catalog           98      630   The Catalogue of double galaxies


Byte-by-byte Description of file: catalog

   Bytes Format Units   Label     Explanations

   1-  7  A7    ---     Pair      [B0-9.] Name of the galaxy pair (1)
   9- 10  I2    h       RAh       Right Ascension 1950 of W component (hours)
  11- 12  I2    min     RAm       Right Ascension 1950 (minutes)
  13- 16  F4.1  s       RAs       Right Ascension 1950 (seconds) (2)
      17  A1    ---     DE-       Declination 1950 of W component (sign)
  18- 19  I2    deg     DEd       Declination 1950 (degrees)
  20- 21  I2    arcmin  DEm       Declination 1950 (minutes)
  22- 23  I2    arcsec  DEs       Declination 1950 (seconds) (2)
  25- 27  A3    ---     MType     Morphological (Hubble) type of W component
  29- 32  F4.1  mag     Bmag      B magnitude of W component (3)
  34- 38  F5.1  arcsec  Rmaj      Major radius of W component (4)
  40- 43  F4.1  arcsec  Rmin      Minor radius of W component (4)
  45- 47  I3    deg     paRmaj    [0/180[? Position angle of W component (5)
  49- 50  I2    h       RA2h      Right Ascension 1950 of W component (hours)
  51- 52  I2    min     RA2m      Right Ascension 1950 (minutes)
  53- 56  F4.1  s       RA2s      Right Ascension 1950 (seconds) (2)
      57  A1    ---     DE2-      Declination 1950 (sign) of E component
  58- 59  I2    deg     DE2d      Declination 1950 (degrees)
  60- 61  I2    arcmin  DE2m      Declination 1950 (minutes)
  62- 63  I2    arcsec  DE2s      Declination 1950 (seconds) (2)
  65- 67  A3    ---     MType2    Morphological type of E component
  69- 72  F4.1  mag     Bmag2     B magnitude of E component (3)
  74- 78  F5.1  arcsec  Rmaj2     Major radius of E component (4)
  80- 83  F4.1  arcsec  Rmin2     Minor radius of E component (4)
  85- 87  I3    deg     paRmaj2   [0/180[? Position angle of E component (5)
  90- 94  F5.1  arcsec  Sep       Angular separation of the two galaxies,
                                    mean error about 1arcsec.
  96- 98  I3    deg     paSep     [0/180[? Position angle of separation vector,
                                    North to East, mean error 2deg.

Note (1): the pair name is made of plate number (4 bytes), decimal point,
          and an ordinal number by increasing RA
Note (2): mean error on position of components is about 2arcsec

Note (3): mean error about 2mag

Note (4): relative error about 0.1 (10%)

Note (5): position angle North to East, mean error about 5deg



History:
    Thanks are due to Heinz Andernach  for asking the
    catalogue to the author in Nov. 1990; he took care of checking and
    correcting the catalogue, in interaction with Zou Zhenlong
    .

References:
  Zou Zhenlong, Chen Jiansheng, Tang Xiaoying, Bian Yulin, Chen Jiasheng:
    1984, Publ. Beijing Astron. Obs., Suppl. Ser. 7, 32
  Zonn W.: 1962, AJ 68, 82
(End) K. Nakajima, 01-Sep-1994;   F. Ochsenbein, H. Andernach        13-Jun-1996