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VizieR

Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
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J/ApJS/219/39
  QSOs selection from SDSS and WISE (Richards+, 2015)
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1.J/ApJS/219/39/cand*Optical+MIR photometric quasar candidates catalog (table 2) (Note) (885503 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)
  RAJ2000 deg (i) Right ascension (J2000) (pos.eq.ra;meta.main)
  DEJ2000 deg (i) Declination (J2000) (pos.eq.dec;meta.main)
  Class (char) Spectral classification (QSO, GALAXY, STAR, CELG, ??, or U) (Note 1)   (src.class)
  zsp  (n) [0/6.7] Spectroscopic redshift (src.redshift)
  umag mag [15/31.7] SDSS u-band AB magnitude, corrected for Galactic extinction (phot.mag;em.opt.U)
  e_umag mag (n) [0.003/99.99] Error on u-band magnitude (stat.error;phot.mag;em.opt.U)
  gmag mag [15/27.4] SDSS g-band AB magnitude, corrected for Galactic extinction (phot.mag;em.opt.B)
  e_gmag mag [0.003/44] Error on g-band magnitude (stat.error;phot.mag;em.opt.B)
  rmag mag [15/25.9] SDSS r-band AB magnitude, corrected for Galactic extinction (phot.mag;em.opt.R)
  e_rmag mag [0.002/18] Error on r-band magnitude (stat.error;phot.mag;em.opt.R)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  imag mag [14.9/25] SDSS i-band AB magnitude, corrected for Galactic extinction (phot.mag;em.opt.I)
  e_imag mag [0.002/21] Error on i-band magnitude (stat.error;phot.mag;em.opt.I)
  zmag mag [15/24.5] SDSS z-band AB magnitude, corrected for Galactic extinction (phot.mag;em.opt.I)
  e_zmag mag [0.003/16] Error on z-band magnitude (stat.error;phot.mag;em.opt.I)
  3.6mag mag [12.8/23.8] 3.6um AB magnitude, corrected for Galactic extinction (phot.mag;em.IR.3-4um)
  e_3.6mag mag [0.02/0.7] Error on 3.6um magnitude (stat.error)
  4.5mag mag [12.5/24.2] 4.5um AB magnitude, corrected for Galactic extinction (phot.mag;em.IR.4-8um)
  e_4.5mag mag [0.01/0.7] Error on 4.5um magnitude (stat.error)
  Fu 3.63uJy [-101/810] SDSS u-band flux density in nanomaggies (phot.mag;em.opt.U)
  e_Fu 3.63uJy [0.04/100] Error in u-band flux density (stat.error)
  Fg 3.63uJy [-1/759] SDSS g-band flux density in nanomaggies (phot.mag;em.opt.B)
  e_Fg 3.63uJy [0.02/54] Error in g-band flux density (stat.error)
  Fr 3.63uJy [-0.3/805] SDSS r-band flux density in nanomaggies (phot.mag;em.opt.R)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  e_Fr 3.63uJy [0.03/86] Error in r-band flux density (stat.error)
  Fi 3.63uJy [-0.3/979] SDSS i-band flux density in nanomaggies (phot.mag;em.opt.I)
  e_Fi 3.63uJy [0.04/163] Error in i-band flux density (stat.error)
  Fz 3.63uJy [-4/945] SDSS z-band flux density in nanomaggies (phot.mag;em.opt.I)
  e_Fz 3.63uJy [0.1/129] Error in z-band flux density (stat.error)
  F3.6 uJy [1.1/25966] 3.6um flux density in microJy (phot.mag;em.IR.3-4um)
  e_F3.6 uJy [0.09/551] Error in 3.6um flux density (stat.error)
  F4.5 uJy [0.8/35613] 4.5um flux density in microJy (phot.mag;em.IR.4-8um)
  e_F4.5 uJy [0.1/656] Error in 4.5um flux density (stat.error)
  Ymag mag (n) [14.6/26] Y-band Vega magnitude from UKIDSS or VHS (Note 2)   (phot.mag;em.IR.J)
  e_Ymag mag (n) [0.003/46] Error in Y-band magnitude (stat.error;phot.mag;em.opt.B)
  Jmag mag (n) [13.9/21] J-band Vega magnitude from UKIDSS or VHS (Note 2)   (phot.mag;em.IR.J)
  e_Jmag mag (n) [0.002/0.5] Error in J-band magnitude (stat.error;phot.mag;em.IR.J)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  Hmag mag (n) [13.2/20.3] H-band Vega magnitude from UKIDSS or VHS (Note 2)   (phot.mag;em.IR.H)
  e_Hmag mag (n) [0.002/0.6] Error in H-band magnitude (stat.error;phot.mag;em.IR.H)
  Kmag mag (n) [11.8/19.6] K-band Vega magnitude from UKIDSS or VHS (Note 2)   (phot.mag;em.IR.K)
  e_Kmag mag (n) [0.001/0.7] Error in K-band magnitude (stat.error;phot.mag;em.IR.K)
  FUV mag (n) [13.7/24.8] GALEX FUV magnitude (AB) (phot.mag;em.UV.100-200nm)
  e_FUV mag (n) [0.008/0.6] Error in FUV magnitude (stat.error)
  NUV mag (n) [13.8/24.8] GALEX NUV magnitude (AB) (phot.mag;em.UV)
  e_NUV mag (n) [0.004/0.5] Error in NUV magnitude (stat.error)
  gisig  (n) [-1/1] Indicator of distance from mean g-i color at ZHOTBEST (GI_SIGMA) (stat.fit.param)
  Au mag [0.01/1] Extinction in SDSS u band (phys.absorption)
  den*   [0/1.2] Star density from KDE algorithm (stat.fit.param)
  denq   [0/402] Quasar density from KDE algorithm (stat.fit.param)
  b_zphO   [0/100] Minimum photometric redshift [ugriz] (src.redshift.phot;stat.min)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  zphO   [0.005/100] Best photometric redshift [ugriz] (ZPHOTBEST) (src.redshift.phot)
  B_zphO   [0.01/100] Maximum photometric redshift [ugriz] (src.redshift.phot;stat.max)
  zphOP   [0.005/100] Probability of ZPHOTBEST being between min and max (ZPHOTPROB) (stat.fit.goodness)
  b_zphIR  (n) [0/6] Minimum photometric redshift [ugrizJHK] (src.redshift.phot;stat.min)
  zphIR  (n) [0.05/6.3] Best photometric redshift (ugrizJHK) (ZPHOTBESTJHK) (src.redshift.phot)
  B_zphIR  (n) [0.02/6.3] Maximum photometric redshift (ugrizJHK) (ZPHOTMAXJHK) (src.redshift.phot;stat.max)
  zphIRP  (n) [0.2/1] Probability of ZPHOTBESTJHK being between min and max (ZPHOTPROBJHK) (stat.fit.goodness)
  Leg   [0/1] Indicates if object is in the SDSS Legacy footprint (meta.code)
  Uni   [0/1] Indicates if object was selected according to Richards et al. (2002AJ....123.2945R) (meta.code)
  Prim   [0/673192456] SDSS primary target selection flag; see Richards et al. (2002AJ....123.2945R) (meta.code)
  pm mas/yr (n) [0.005/193] Proper motion in milliarcseconds per year (pos.pm)
  DB   [1/7] Bitwise flag indicating low-z (20), mid-z (21), and high-z (22) sources (meta.code)
  Sloan  Display the online SDSS data for the nearest object (meta.ref.url)

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