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J/ApJS/155/257
 NBC Quasar Candidate Catalog (Richards+, 2004)
ReadMe+ftp
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Post annotation 		img(gal)
1.J/ApJS/155/257/table1NBC Quasar Candidate Catalog (100563 rows)

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  recno  Record number within the original table (starting from 1) (meta.record)
  [RNG2004]  Unique catalog number (meta.id;meta.main)
  Name (char) The SDSS name (Note 1)   (meta.id)
  RAJ2000 deg Right ascension in decimal degrees (J2000.0) (pos.eq.ra;meta.main)
  DEJ2000 deg Declination in decimal degrees (J2000.0) (pos.eq.dec;meta.main)
  ID (char) SDSS Object ID string (Note 2)   (meta.id)
  RPix pix Row position of object in field (pos.cartesian;instr.det)
  CPix pix Column position of object in field (pos.cartesian;instr.det)
  umag mag PSF SDSS u asinh magnitude (Note 3)   (phot.mag;em.opt.U)
  e_umag mag Error in umag (stat.error;phot.mag;em.opt.U)
  gmag mag PSF SDSS g asinh magnitude (Note 3)   (phot.mag;em.opt.B)

ALL cols		    
   
  e_gmag mag Error in gmag (stat.error;phot.mag;em.opt.B)
  rmag mag PSF SDSS r asinh magnitude (Note 3)   (phot.mag;em.opt.R)
  e_rmag mag Error in rmag (stat.error;phot.mag;em.opt.R)
  imag mag PSF SDSS i asinh magnitude (Note 3)   (phot.mag;em.opt.I)
  e_imag mag Error in imag (stat.error;phot.mag;em.opt.I)
  zmag mag PSF SDSS z asinh magnitude (Note 3)   (phot.mag;em.opt.I)
  e_zmag mag Error in zmag (stat.error;phot.mag;em.opt.I)
  Au mag Galactic extinction in the u band (phys.absorption)
  Ag mag Galactic extinction in the g band (phys.absorption)
  Ar mag Galactic extinction in the r band (phys.absorption)
  Ai mag Galactic extinction in the i band (phys.absorption)
  Az mag Galactic extinction in the z band (phys.absorption)
  QDen  KDE (Kernel Density Estimator) quasar density (stat.fit.param)

ALL cols		    
   
  SDen  KDE (Kernel Density Estimator) star density (stat.fit.param)
  z  Photometric redshift (src.redshift.phot)
  e_z  Lower limit in z (stat.error;src.redshift)
  E_z  Upper limit in z (stat.error;stat.max)
  zProb  Photometric redshift range probability (stat.fit.goodness)
  r_class (char) Origin of class: 2QZ or release number (Note 4)   (meta.ref;pos.frame)
  class (char) Previous catalog object classification (Note 4)   (meta.code.class;src.class;meta.table)
  zPrev  (n) Previous catalog object redshift (Note 5)   (src.redshift.phot)
  S20cm mJy (n) 20cm flux density (Note 5)   (phot.flux.density;em.radio.750-1500MHz)
  logX [ct/s] (n) Log RASS full-band count rate (Note 6)   (phot.count;em.X-ray)
  pm mas/yr (n) Proper motion (Note 7)   (pos.pm)

ALL cols		    
(n) indicates a possible blank or NULL column  
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