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  Quasar luminosity function from SDSS-DR3 (Richards+, 2006)
Post annotation
1.J/AJ/131/2766/table1Quasar selection function (6413 rows)

Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
  imag mag The i band magnitude (phot.mag;em.opt.I)
  z  Redshift (src.redshift)
  point  (n) [0,1] Non-radio point source selection function (meta.note)
  radio  (n) [0,1] Radio-detected point source selection function (meta.note)
  extend  (n) [0,1] Extended source selection function (meta.note)

ALL cols
(n) indicates a possible blank or NULL column(i)indexed column
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usage  Display UCD1+    UCD1  
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