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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/776/136
  QPQ VI. HI absorption of z∼2 quasars (Prochaska+, 2013)
Post annotation
img(gal)
1.J/ApJ/776/136/qpq6Quasars Probing Quasars VI (QPQ6) redshifts and HI measurements (tables 1, 3 and 4) (646 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)
  f/g-Q (char) Foreground quasar identifier (meta.id;meta.main)
  L912 [cW/m2/nm](n) [28/32] Log of 912Å luminosity; erg/s/cm2(Note 2)   (phys.luminosity;em.IR)
  Lbol [mW/m2] (n) [45/48] Log of bolometric luminosity; erg/s/cm2 (Note 2)   (phys.luminosity)
  b/g-Q (char) Background quasar identifier (meta.id.assoc)
  zbg   [1.7/4.9] Background redshift (src.redshift;pos.heliocentric)
  Nq  (n)Number of foreground quasars associated in QPQ6 (meta.number)
  b kpc [31/999] Impact parameter R (src.impactParam)
  gUV  (n) [2/17964] Enhancement in flux relative to the extragalactic UV background (Note 2)   (phot.flux;arith.ratio)
  Inst (char) Source spectrum (Note G1)   (meta.id;instr)
  Lines (char) Emission lines used in zem (meta.id;spect.line)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  zfg   [1.6/4.5] Emission line derived redshift (src.redshift;pos.heliocentric)
  e_zfg km/s [272/794] Uncertainty in zfg (stat.error)
  S/N   [6/205] Signal-to-noise per rest-frame Å (Note 3)   (stat.snr)
  <F2000>   [0/1.2] Average flux (Note 4)   (phot.flux)
  DelF   [-0.5/1] Value defined in Equ. 4 (Note 5)   (phot.flux;arith.ratio)
  delv km/s (n) [-1733/1553] Velocity offset (Note 6)   (phys.veloc;arith.diff)
  LWave 0.1nm (n) [3204/6615] Lower wavelength of Lyα analysis (Å) (em.wl)
  UWave 0.1nm (n) [3217/6634] Upper wavelength of Lyα analysis (Å) (em.wl)
  l_WLya (char) Limit flag on WLya (meta.code.error)
  WLya 0.1nm (n) [0.2/23.7] Rest equivalent width (Note 7)   (spect.line.eqWidth)
  e_WLya 0.1nm (n) [0.01/0.3] Uncertainty in WLya (stat.error)
  l_logNH (char) Limit flag on logNH (meta.code.error)
  logNH [cm-2] (n) [14.3/21.3] Log of H I column density (phys.columnDensity)
  e_logNH [cm-2] (n) [0.1/0.4] Uncertainty in logNH (stat.error)
  OT  (n) [-1/1] Optical thick flag (Note 8)   (meta.code)
  Qfg (char) Name of the foreground quasar in SIMBAD (meta.id)
  Qbg (char) Name of the background quasar in SIMBAD (meta.id)
  DR9Q  (n)Sources from Paris+, 2012, VII/269, within 2" (meta.ref.url)
  Obs  (n)Display the observation log (meta.code)
  Sloan  Display the online SDSS data for the nearest object (meta.ref.url)
  Simbad  ask the Simbad data-base about this object (meta.ref.url)
  _RA deg (i) Postion of foreground quasar (from f/g-Q identifier (right ascension part) (pos.eq.ra;meta.main)
  _DE deg (i) Postion of foreground quasar (from f/g-Q identifier (declination part) (pos.eq.dec;meta.main)

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