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VII/252
 SDSS-DR5 quasar catalog (Schneider+, 2007) This catalogue is obsoleted by VII/260
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img(gal)
1.VII/252/dr5qsoThe SDSS Quasar Catalog IV, DR5 (77429 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)
  SDSS (char) SDSS DR5 Object Designation (Note 1)   (meta.id;meta.main)
  RAJ2000 deg Right Ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
  DEJ2000 deg Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)
  z  Redshift (src.redshift)
  umag mag (n) SDSS BEST u band PSF magnitude (Note 2)   (phot.mag;em.opt.U)
  e_umag mag Error in B-umag (stat.error;phot.mag;em.opt.U)
  gmag mag (n) SDSS BEST g band PSF magnitude (Note 2)   (phot.mag;em.opt.B)
  e_gmag mag Error in B-gmag (stat.error;phot.mag;em.opt.B)
  rmag mag (n) SDSS BEST r band PSF magnitude (Note 2)   (phot.mag;em.opt.R)
  e_rmag mag Error in B-rmag (stat.error;phot.mag;em.opt.R)

ALL cols
    
(n) indicates a possible blank or NULL column  
  imag mag (n) SDSS BEST i band PSF magnitude (Note 2)   (phot.mag;em.opt.I)
  e_imag mag Error in B-imag (stat.error;phot.mag;em.opt.I)
  zmag mag (n) SDSS BEST z band PSF magnitude (Note 2)   (phot.mag;em.opt.I)
  e_zmag mag Error in B-zmag (stat.error;phot.mag;em.opt.I)
  Au mag Galactic absorption in u band (Note 3)   (phys.absorption)
  logHI [cm-2] Log of Galactic HI column density (phys.columnDensity;pos.galactic)
  F20cm mag (n) FIRST Peak flux density (ABmag) at 20cm (Note 4)   (phot.flux.density;em.radio.750-1500MHz)
  w_F20cm  The S/N ratio for FIRST flux (stat.weight)
  sepR arcsec SDSS/FIRST separation (pos.angDistance)
  fRo   [0/1] FIRST flux at optical position but no FIRST source flag (1=detectable flux) (meta.code)
  fR1   [0/1] FIRST source 2-30" from optical position flag (1=source exists) (meta.code)
  logX [ct/s] (n) RASS BSC/FSC full band count rate (Note 5)   (phot.count;em.X-ray)
  w_logX  The S/N ratio for RASS count rate (stat.weight)

ALL cols
    
(n) indicates a possible blank or NULL column  
  sepX arcsec SDSS/RASS separation (pos.angDistance)
  Jmag mag (n) 2MASS J band magnitude (Note 6)   (phot.mag;em.IR.J)
  e_Jmag mag (n) Error in Jmag (stat.error;phot.mag;em.IR.J)
  Hmag mag (n) 2MASS H band magnitude (Note 6)   (phot.mag;em.IR.H)
  e_Hmag mag (n) Error in Hmag (stat.error;phot.mag;em.IR.H)
  Kmag mag (n) 2MASS K band magnitude (Note 6)   (phot.mag;em.IR.K)
  e_Kmag mag (n) Error in Kmag (stat.error;phot.mag;em.IR.K)
  sepH arcsec SDSS/2MASS separation (pos.angDistance)
  iMAG mag Absolute i band magnitude (Note 7)   (phys.magAbs)
  D(g-i) mag (n) Offset of quasar (g-i) from distribution (g-i) mode (Note 8)   (stat.fit.residual)
  Mph   [0/1] Morphology flag (1=extended source) (meta.code)
  S1   [0/1] SCIENCEPRIMARY flag (1=SCIENCEPRIMARY) (meta.code)
  mode   [0-3] SDSS MODE (blends, overlapping scans) flag (Note 9)   (meta.code.class)

ALL cols
    
(n) indicates a possible blank or NULL column  
  utf   [0/1] Uniform target selection flag (Note 10)   (meta.code)
  TflagB  BEST target selection flag (meta.code)
  Lz   [0/1] Low-z Quasar (color selection only) target flag (1=targeted as Low-z Quasar) (meta.code)
  Hz   [0/1] High-z Quasar (color selection only) target flag (1=targeted as High-z Quasar) (meta.code)
  fR   [0/1] FIRST target flag (1=targeted) (meta.code)
  fX   [0/1] ROSAT target flag (1=targeted) (meta.code)
  fS   [0/1] Serendipity target flag (1=targeted) (meta.code)
  f*   [0/1] Star target flag (1=targeted) (meta.code)
  fG   [0/1] Galaxy target flag (1=targeted) (meta.code)
  run  SDSS Imaging Run Number for photometric measurements (meta.id)
  MJD-Im d Modified Julian Date of imaging observation (time.epoch)
  MJD-Sp d Modified Julian Date of spectroscopic observation (time.epoch)
  Pnum  Spectroscopic Plate Number (obs.field)

ALL cols
    
(n) indicates a possible blank or NULL column  
  Fnum  Spectroscopic Fiber Number (meta.note)
  rerun  SDSS Photometric Processing Rerun Number (meta.id)
  Cam  SDSS Camera Column Number (meta.id;instr)
  Frame  SDSS Frame Number (obs.field)
  Obj  SDSS Object Number (meta.id)
  Tflag  TARGET target selection flag (meta.code)
  LzT   [0/1] Low-z Quasar (color selection only) target flag (1=targeted as Low-z Quasar) (meta.code)
  HzT   [0/1] High-z Quasar (color selection only) target flag (1=targeted as High-z Quasar) (meta.code)
  fRT   [0/1] FIRST target flag (1=targeted) (meta.code)
  fXT   [0/1] ROSAT target flag (1=targeted) (meta.code)
  fST   [0/1] Serendipity target flag (1=targeted) (meta.code)
  f*T   [0/1] Star target flag (1=targeted) (meta.code)
  fGT   [0/1] Galaxy target flag (1=targeted) (meta.code)

ALL cols
    
(n) indicates a possible blank or NULL column  
  uPSF mag (n) SDSS TARGET u band PSF magnitude (Note 2)   (phot.mag;em.opt.U)
  e_uPSF mag (n) Error in T-umag (stat.error)
  gPSF mag (n) SDSS TARGET g band PSF magnitude (Note 2)   (phot.mag;em.opt.B)
  e_gPSF mag (n) Error in T-gmag (stat.error)
  rPSF mag (n) SDSS TARGET r band PSF magnitude (Note 2)   (phot.mag;em.opt.R)
  e_rPSF mag (n) Error in T-rmag (stat.error)
  iPSF mag (n) SDSS TARGET i band PSF magnitude (Note 2)   (phot.mag;em.opt.I)
  e_iPSF mag (n) Error in T-imag (stat.error)
  zPSF mag (n) SDSS TARGET z band PSF magnitude (Note 2)   (phot.mag;em.opt.I)
  e_zPSF mag (n) Error in T-zmag (stat.error)
  SpOID (char) The 64-bit integer Spectroscopic Identification flag (meta.id)
  Prev (char) Object Name if previously published (Note 11)   (meta.id)
  BH  Display the black hole mass estimates from Shen et al. 2008, Cat. J/ApJ/680/169 (meta.ref.url)
  DR5  Display the detailed photometry from SDSS-DR5 (Cat. II/276) (meta.ref.url)
  2MASS  Display the 2MASS data (meta.ref.url)
  X  Display the X-ray sources closer than 1' (meta.ref.url)
  Radio  Display the radio sources closer than 1' (meta.ref.url)

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