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J/MNRAS/328/805       The 2dF QSO Redshift Survey. VIII          (Outram+, 2001)
The 2dF QSO Redshift Survey - VIII. Absorption systems in the 10k catalogue.
    Outram P.J., Smith R.J., Shanks T., Boyle B.J., Croom S.M., Loaring N.S.,
    Miller L.
   <Mon. Not. R. Astron. Soc. 328, 805 (2001)>
   =2001MNRAS.328..805O
ADC_Keywords: QSOs ; Surveys ; Spectroscopy

Keywords: surveys - quasars: absorption lines - cosmology: observations -
          large-scale structure of Universe

Abstract:
    We examine the highest signal-to-noise ratio spectra from the 2dF QSO
    Redshift Survey (2QZ) 10k release (Cat. VII/223) and identify over
    100 new low-ionization heavy-element absorbers: damped Lyman-α
    (DLA) candidates suitable for higher-resolution follow-up
    observations. These absorption systems map the spatial distribution of
    high-z metals in exactly the same volumes as the foreground 2QZ QSOs
    themselves sample and hence the 2QZ gives us the unique opportunity to
    compare directly the two tracers of large-scale structure. We examine
    the cross-correlation of the two populations to see how they are
    relatively clustered, and, by considering the colour of the QSOs,
    detect a small amount of dust in these metal systems.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        53      137   Low-ionization 2QZ absorption systems


See also:
   VII/223 :  The 2dF QSO Redshift Survey. V. The 10k catalogue (Croom+ 2001)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label   Explanations

   1- 16  A16   ---     2QZ     2QZ QSO identification
  18- 22  F5.2  mag     bjmag   bj magnitude
  24- 28  F5.3  ---     zQSO    QSO redshift
  30- 34  F5.3  ---     zabs    Absorption redshift
  36- 40  F5.2  ---     W0      Rest equivalent width of Mg II 2796,2803Å
                                 doublet, unless stated explicitly in n_W0
      42  I1    ---     n_W0    [3-6]? Ion of the rest equivalent width if
                                       not Mg II (1)
  44- 53  A10   ---     Ion     [a-l] Ion identification (2)

Note (1): Rest equivalent width from the following lines:
      3 = Fe II 2600Å (Mg II blended with sky line)
      4 = H I 1215Å
      5 = C IV 1548, 1550Å doublet
      6 = Mg II 2796Å only
Note (2): Ion identifications are coded as follows:
      a = H I
      b = C II
      c = C IV
      d = O I
      e = Mg I
      f = Mg II
      g = Al II
      h = Al III
      i = Si II
      j = Si III
      k = Si IV
      l = Fe II


History:
    From electronic version of the journal

References:
    Boyle et al.,  Paper I          2000MNRAS.317.1014B
    Croom et al.,  Paper II         2001MNRAS.325..483C
    Hoyle et al.,  Paper IV         2002MNRAS.329..336H
    Croom et al.,  Paper V          2001MNRAS.322L..29C, Cat. VII/223
    Outram et al., Paper VI         2001MNRAS.328..174O
(End)                         James Marcout, Patricia Bauer [CDS]    31-Jan-2002