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VizieR

Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
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J/ApJ/847/81
  HeII photoionization rates of quasars (Schmidt+, 2017)
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img(gal)
1.J/ApJ/847/81/losqso(c)Overview of the FUV spectra, HeII sightlines and the number of foreground quasars for the 22 background quasar sightlines (tables 1 and 2) (22 rows)
2.J/ApJ/847/81/table3(c)Quasars discovered within our survey (131 rows)
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Query by Constraints constraints help applied on Columns (Output Order: + - )
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Column  Constraint Explain   (UCD)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
   (ALL)HE2QS (char) He II-transparent quasar ID (meta.id;meta.main)
   (ALL)Inst (char) HST instrument +grating (instr)
  (1)R   [1000/18000] Dispersion (instr.dispersion)
  (1)HST   [9350/13013] HST Program Id (meta.id;obs)
  (1)PI (char) HST Program PI (obs.observer)
  (1)Ref (char) Reference(s) (Note 1)   (meta.ref;pos.frame)
  (1)RAJ2000 "h:m:s" (i) Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
  (1)DEJ2000 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
  (1)zBG   [2.7/4] Spectroscopic redshift of HeII-transparent QSO (src.redshift;pos.heliocentric)
  (1)N-VLT  (n) [0/2] Number of quasars detected with VLT/VIMOS+LBT/LBC (meta.number)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)N-NTT  (n) [0/2] Number of quasars detected with NTT/EFOSC2 (meta.number)
  (1)N-CAHA  (n) [0/5] Number of quasars detected with CAHA/TWIN (meta.number)
  (1)N-SDSS  (n) [0/7] Number of quasars used from SDSS (Note 1)   (meta.number)
  (1)N-Lit  (n) [1/2] Number of quasars used from the Literature (Note 2)   (meta.number)
  (1)Nfg  (n)Number of foreground quasars in this field (link to table 3) (meta.number)
   (ALL)Sloan (char) Display the online SDSS data for the nearest object (meta.ref.url)
  (1)SimbadName (char) Designation understandable by the Simbad data-base (meta.id)
  (1)NED (char) ask the NED data-base about this object (meta.ref.url)
  (2)RAJ2000 deg (i) Right Ascension, foreground QSOs (J2000) (pos.eq.ra;meta.main)
  (2)DEJ2000 deg (i) Declination, foreground QSOs (J2000) (pos.eq.dec;meta.main)
  (2)zspec   [0.6/4.2] Spectroscopic Redshift (src.redshift)
  (2)rmag mag (n) [17/24.5] SDSS r band AB magnitude (phot.mag;em.opt.R)
  (2)M1450 mag (n) [-27.8/-20.5] Absolute M1450 magnitude (phys.magAbs)
  (2)Sep arcsec [3.1/80.4] Angular separation (pos.angDistance)
  (2)Dprop Mpc [1.5/39.8] Transverse separation in situation proper distances; in proper Mpc units (pos.distance)
  (2)GamHeQSO s-1 [6.8e-17/1.1e-06] HeII photoionization rate (phys.ionizParam.rad)
  (2)Simbad (char) ask the Simbad data-base about this object (meta.ref.url)

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