VizieR

CfA VizieR . ADAC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . INASAN VizieR .
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VizieR

Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
Target Name (resolved by Sesame) or Position:
 Target dimension:
NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  
J/ApJ/900/141
  X-ray weak quasars from SDSS & Chandra (Pu+, 2020)
ReadMe+ftp
2020ApJ...900..141P
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Post annotation 		img(gal)
1.J/ApJ/900/141/xqsosChandra observations and X-ray and optical properties (Tables 2 and 3) (1825 rows)

Simple ConstraintList Of Constraints
 
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 designation (HHMMSS.ss+DDMMSS.s; J2000) (Note G1)   (meta.id;meta.main)
  DR   [7/10] SDSS Data release (meta.id;meta.dataset)
  z   [1.7/2.7] Redshift (Note 1)   (src.redshift)
  ObsID   [323/17627] Chandra observation identifier (meta.id;obs.param;obs)
  Exp ks [0.6/166] Chandra effective exposure time in the broad band (time.duration;obs.exposure)
  l_CtsBB (char) Limit flag on CtsBB (Note 2)   (meta.code.error)
  CtsBB ct [1.9/841] Broad-band (0.5-7keV) net counts in source region (Note 2)   (phot.count;em.X-ray)
  e_CtsBB ct (n) [1.3/39.5] Lower uncertainty on CtsBB (stat.error)
  E_CtsBB ct (n) [2.7/41] Upper uncertainty on CtsBB (stat.error;stat.max)
  l_CtsSB (char) Limit flag on CtsSB (Note 2)   (meta.code.error)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  CtsSB ct [1.9/721] Soft-band (0.5-2keV) net counts in source region (Note 2)   (phot.count;em.X-ray)
  e_CtsSB ct (n) [1.3/29.1] Lower uncertainty on CtsSB (stat.error)
  E_CtsSB ct (n) [2.7/30.1] Upper uncertainty on CtsSB (stat.error;stat.max)
  l_CtsHB (char) Limit flag on CtsHB (Note 2)   (meta.code.error)
  CtsHB ct [1.9/212.8] Hard-band (2-7keV) net counts in source region (Note 2)   (phot.count;em.X-ray)
  e_CtsHB ct (n) [1.3/22.4] Lower uncertainty on CtsHB (stat.error)
  E_CtsHB ct (n) [2.7/23.6] Upper uncertainty on CtsHB (stat.error;stat.max)
  BRatio  (n) [0.04/10.25] Band ratio, hard-band to soft-band counts (Note 3)   (phot.flux;arith.ratio)
  e_BRatio  (n) [0.02/9] Lower uncertainty on BRatio (stat.error)
  E_BRatio  (n) [0.03/84] Upper uncertainty on BRatio (stat.error;stat.max)
  Gamma   [-1.4/4] 0.5-7keV effective power-law photon index (Note 4)   (meta.code;spect.index;em.X-ray.medium)
  e_Gamma  (n) [0.1/4.6] Lower uncertainty on Gamma (stat.error)
  E_Gamma  (n) [0.1/2.3] Upper uncertainty on Gamma (stat.error;stat.max)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  SamB   [0/1] Member of sample B (Note 5)   (meta.code)
  SamC   [0/1] Member of sample C (Note 5)   (meta.code)
  iMag mag [-29.7/-22.8] Absolute i-band magnitude (phys.magAbs;em.opt.I)
  l_F2keV (char) Limit flag for f2keV (meta.code.error)
  F2keV 10-32mW/m2/Hz [0.01/95] Rest-frame 2keV flux density, 10–32erg/cm2/s/Hz (Note 6)   (phot.flux;em.X-ray)
  l_F0.5-7 (char) Limit flag for F0.5-7 (meta.code.error)
  F0.5-7 10-14mW/m2 [0.1/54] Observed-frame 0.5-7keV flux, 10–14erg/cm2/s (Note 7)   (phot.flux;em.X-ray)
  l_logLX (char) Limit flag for logLX (meta.code.error)
  logLX 10-7W [43.2/46] Logarithm of the rest-frame 2-10 keV luminosity, erg/s (Note 7)   (phys.luminosity;em.X-ray)
  F2500 10-27mW/m2/Hz [0.02/12.4] Rest-frame 2500Å flux density, 10–27erg/cm2/s/Hz (phot.flux.density)
  l_aOX (char) Limit flag for aOX (meta.code.error)
  aOX   [-2.5/-0.9] Measured X-ray-to-optical power-law slope (Note 6)   (spect.index)
  l_DaOX (char) Limit flag for DaOX (meta.code.error)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  DaOX   [-1/0.43] Difference between the measured and expected aOX (Note 8)   (stat.fit.residual)
  l_fweak (char) Limit flag for fweak (meta.code.error)
  fweak   [0.1/415] X-ray weakness factor measured from DaOX (stat.fit.param)
  REW 0.1nm [0.9/479.1] Rest-frame equivalent width, CIV1549Å emission line (spect.line.eqWidth)
  D(g-i) mag [-0.97/2.67] Relative g-i color index (phot.color;em.opt.B;em.opt.I)
  l_R (char) Limit flag on R (meta.code.error)
  R   [1.3/247.2] Radio-loudness parameter (Note 9)   (phot.flux;arith.ratio)
  XWeak   [0/1] X-ray weak flag (Note 10)   (meta.code)
  Sloan  Display the online SDSS-DR14 data for the nearest object (meta.ref.url)
  Simbad  ask the Simbad data-base about this object (meta.ref.url)
  NED  ask the NED data-base about this object (meta.ref.url)
  _RA deg (i) Right Ascension (J2000) from SIMBAD (not part of the original data) (pos.eq.ra;meta.main)
  _DE deg (i) Declination (J2000) from SIMBAD (not part of the original data) (pos.eq.dec;meta.main)

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