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VII/143             Quasar Candidates   (Crampton+ 1985-1990)
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Quasar Candidates from grens plates
     Crampton D., Schade D., Cowley A.P.
    <Astron. J. 90, 987 (1985)>
    =1985AJ.....90..987C
Quasar candidates in two extended CFHT fields: 1338+27 and 1639+40.
     Crampton D., Cowley A.P., Schmidtke P.C.
    <Astron. J. 96, 816 (1988)>
    =1988AJ.....96..816C
Redshifts of quasars in the CFHT/MMT survey. III.
     Crampton D., Cowley A.P., Hartwick F.D.A
    <Astron. J. 100, 47 (1990)>
    =1990AJ....100...47C
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ADC_Keywords: QSOs ; Redshifts

Description:
    This data set is based on  data in three  publications.  The positions
    and  magnitudes  of  quasar  candidates  discovered  on  Canada-France
    Hawaii-Telescope (CFHT) blue green plates are given. Spectroscopy with
    the  Multiple Mirror Telescope (MMT) indicates  that 70 percent of the
    candidates are quasars, and most of the others are white dwarfs or hot
    subluminous  stars.  Most  of  the  redshifts  are  less  than  z=1.7.
    Additional spectroscopic  observations  at  Steward  Observatory  were
    used.  The catalog  lists a name  based on  position,  B1950 position,
    B magnitude, or visual magnitude, redshift, and remarks.

File Summary:
--------------------------------------------------------------------------------
 FileName    Lrecl    Records    Explanations
--------------------------------------------------------------------------------
ReadMe          80          .    This file
catalog.dat     51        777    The catalogue
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See also:
    VII/158 : Catalog of quasi-stellar objects (Hewitt & Burbidge, 1993)
    VII/188 : Quasars and Active Galactic Nuclei (7th Ed.) (Veron+ 1996)

Byte-by-byte Description of file: catalog.dat
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   Bytes Format Units   Label     Explanations
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       1  A1    ---     Rem       [*] if there is a remark in the
                                      original catalogue
   2- 12  A11   ---     Name      Designation based on position
  15- 16  I2    h       RAh       Right Ascension 1950 (hours)
  18- 19  I2    min     RAm       Right Ascension 1950 (minutes)
  21- 24  F4.1  s       RAs       Right Ascension 1950 (seconds)
      27  A1    ---     DE-       Declination 1950 (sign)
  28- 29  I2    deg     DEd       Declination 1950 (degrees)
  31- 32  I2    arcmin  DEm       Declination 1950 (minutes)
  34- 35  I2    arcsec  DEs       Declination 1950 (seconds)
  38- 41  F4.1  mag     Bmag      B Magnitude, or visual estimate (cf n_Bmag)
      42  A1    ---     n_Bmag    [*] when Bmag is a visual estimate
  44- 48  F5.3  ---     z         ? Redshift (the last digit may be blank)
      49  A1    ---     u_z       [*:?] Uncertainty flag on z
                                   (* when z in unknown)
  50- 51  A2    ---     Nature    Remarks on the nature of the object
--------------------------------------------------------------------------------

Acknowledgements:
    It is a pleasure to thank David Crampton <crampton@dao.nrc.ca>
    for providing the electronic data to M. Creze in October 1991,
    and for reviewing the initial version of the files.
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(End)                                     Francois Ochsenbein [CDS]  27-Nov-1996