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J/MNRAS/244/408        LDSS Deep Redshift Survey                 (Colless+ 1990)
The LDSS deep redshift survey
     COLLESS M., ELLIS R.S., TAYLOR K., HOOK R.N.
    <Mon. Not. R. Astron. Soc. 244, 408 (1990)>
    =1990MNRAS.244..408C
ADC_Keywords: Galaxies, optical; Regional catalog; Spectroscopy; Redshifts


Description:
    Using a multisplit spectrograph, LDSS, we have obtained intermediate
    dispersion spectroscopy for a new sample of 149 faint objects
    selected randomly from the magnitude range  21≤bJ≤22.5 in three
    high-latitude fields.

Table 1: Photographic plate material.
   ------------------------------------------------------------------
   Field    RA    (1950)   Dec    Plate  Isophote   Magnitude range
   ------------------------------------------------------------------
   00 hr   00 54 48.1 -27 54 45   J 1888  26.72   20.92≤bJ≤22.71
   (SGP)   00 54 48.7 -27 54 04   F 1996  25.20

   10hr    10 43 37.9 -00 04 48   J 1834  26.44   20.98≤bJ≤22.48
           10 43 37.9 -00 04 48   F 1835  24.61

   13hr    13 43 l4.0 -00 00 29   J l836  26.52   2l.00≤bJ≤22.44
           13 43 14.0 -00 00 29   F 1837  24.82
   ------------------------------------------------------------------

Table 2: Details of spectroscopic survey.
   --------------------------------------------------------------------
    Zone   RA    (1950)    Dec       Date Obs. Integ.(s) Sampling rate
   --------------------------------------------------------------------
    00.2   00 54 49.4 -27 43 53    23,24/10/87  20000      0.36    80%
    10.2   10 43 55.4 +00 05 33        19/3/88  13500      0.25    87%
    10.4   10 43 51.4 -00 06 41        22/3/88  12000      0.23    82%
    13.2   13 41 57.3 +00 06 25     19,23/3/88  18000      0.23    73%
    13.4   13 41 09.1 -00 00 16        22/3/88  11500      0.24    87%
    13.5   13 41 08.8 +00 10 18        21/3/88  15000      0.24    74%
   --------------------------------------------------------------------

Table 4: Mean redshifts and comparison with no-evolution model.
    ----------------------------------------
    Field     N       <z>   Confidence level
    ----------------------------------------
    00 hr    21     0.296      0.37
    10 hr    29     0.302      0.74
    13 hr    37     0.337      0.009
    ----------------------------------------
    All      87     0.312      0.016
    ----------------------------------------
    Note: Confidence level at which the observed n(z) is inconsistent
          with the NE n(z)

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table3            76      169   The catalogue


Byte-by-byte Description of file: table3

   Bytes Format  Units   Label    Explanations

   1-  7  A7     ---     LDSS     Designation in LDSS survey (1)
  11- 12  I2     h       RAh      Right Ascension B1950 (hours)
  14- 15  I2     min     RAm      Right Ascension B1950 (minutes)
  17- 21  F5.2   s       RAs      Right Ascension B1950 (seconds)
      23  A1     -       DE-      Declination B1950 (sign)
  24- 25  I2     deg     DEd      Declination B1950 (degrees)
  27- 28  I2     arcmin  DEm      Declination B1950 (minutes)
  30- 33  F4.1   arcsec  DEs      Declination B1950 (seconds)
  37- 41  F5.2   mag     bJ       [20.9/22.7] COSMOS photographic magnitude
  44- 48  F5.2   mag     bJ-rF    [-0.5/3]? photographic colour index
      53  A1     ---     Class    [sg] COSMOS star/galaxy classification
  57- 61  F5.3   ---     z        [0/1]? Redshift
      65  I1     ---     q_Z      [1/5] Redshift quality class (2)
  69- 70  I2     0.1nm   W        [1/88]? Restframe equivalent width of
                                  [O II] at 3727A

Note (1): the ID in column 1 is f.z.#, where f is the R.A. number,
    z is the zone number (Table 2) and # the object number
    within the zone
Note (2): Qualities are:
    =1: the most reliable redshifts
    =2: based on a single feature (usually [OII] 3727 or CaH&K  for
        galaxies, MgI b band for stars)
    =3: spectra for which no redshift could be ascertained
    =4: spectra which were too distorted to extract
    =5: survey sample objects for which no spectrum could be detected


History: keypunched at CDS

(End)                    James Marcout,  Francois Ochsenbein [CDS]   20-Apr-1994