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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)
ReadMe+ftp
2013ApJ...776..136P
Similar Catalogs
Post annotation 		img(gal)
1.J/ApJ/776/136/table2Journal of observations (105 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)
  b/g-Q (char) Background quasar identifier (Note 1)   (meta.id.assoc)
  Obs (char) Observatory (meta.id;instr.obsty)
  Inst (char) Instrument (Note 2)   (meta.id;instr)
  Date "Y:M:D" (n)Observation date (Note 3)   (time.epoch;obs)
  Exp s [300/16800] Exposure time (Note 4)   (time.duration;obs.exposure)
  Nq  (n)Number of foreground quasars associated in QPQ6 (meta.number)
  Sloan  Display the online SDSS data for the nearest object (meta.ref.url)
  _RA deg (i) Postions from background quasar identifier (right ascension part) (pos.eq.ra;meta.main)
  _DE deg (i) Postions from background quasar identifier (declination part) (pos.eq.dec;meta.main)

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