VizieR

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

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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/762/L19
  Quasar pairs spectroscopy (Prochaska+, 2013)
ReadMe+ftp
2013ApJ...762L..19P
Similar Catalogs
Post annotation 		img(gal)
1.J/ApJ/762/L19/table1Sample quasar pairs (74 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)
  FName (char) Foreground QSO identifier (JHHMMSS.ss+DDMMSS.s) (meta.id;meta.main)
  zfg   [1.6/3.3] Foreground Quasar redshift estimate (src.redshift;pos.heliocentric)
  e_zfg   [0.002/0.02] Uncertainty in zfg (stat.error)
  BName (char) Background QSO identifier (JHHMMSS.ss+DDMMSS.s) (meta.id.assoc)
  zbg   [1.6/3.8] Background Quasar redshift estimate (src.redshift;pos.heliocentric)
  rho kpc [31/299] Impact parameter ρ (src.impactParam)
  Sep arcsec Separation θ between the foreground and background quasars (pos;arith.diff)
  Inst (char) Spectrum instrument identifier (SDSS, BOSS, GMOS, LRISb or MagE) (meta.id;instr)
  zLya   [1.6/3.3] Redshift characterizing Lyα absorption in the spectrum of the background QSO (src.redshift;pos.heliocentric)
  f_logNHI (char) Limit flag on logNHI (meta.code)

ALL cols		    
 (i)indexed column
  logNHI [cm-2] [18/21.2] Log H I column density (phys.columnDensity)
  e_logNHI [cm-2] (n) [0.2/0.4] Uncertainty in logNHI (stat.error)
  f_W1334 (char) Limit flag on W1334 (meta.code)
  W1334 0.1nm (n) [0.04/2.8] Equivalent width of CII 1334Å line (spect.line.eqWidth)
  e_W1334 0.1nm (n) [0.02/0.3] Uncertainty in W1334 (stat.error)
  f_W1548 (char) Limit flag on W1548 (meta.code)
  W1548 0.1nm (n) [0.09/2.3] Equivalent width of CIV 1548Å line (spect.line.eqWidth)
  e_W1548 0.1nm (n) [0.01/0.3] Uncertainty in W1548 (stat.error)
  OT  (n) [-1/1] Optical thickness flag at Lyman limit: -1=thin, 1=thick, 0=ambiguous (meta.code)
  Sloan  Display the online SDSS data for the foreground QSO (meta.ref.url)
  SimbadName (char) Designation understandable by the Simbad data-base (meta.id)
  NED  ask the NED data-base about this object (meta.ref.url)
  _RA deg (i) Positions from Foreground quasar name (right ascension part) (pos.eq.ra;meta.main)
  _DE deg (i) Positions from Foreground quasar name (declination part) (pos.eq.dec;meta.main)

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