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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/847/81
  HeII photoionization rates of quasars (Schmidt+, 2017)
ReadMe+ftp
2017ApJ...847...81S
Similar Catalogs
Post annotation 		img(gal)
1.J/ApJ/847/81/table3Quasars discovered within our survey (131 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)
  HE2QS (char) He II-transparent quasar ID (Note 1)   (obs.field)
  RAJ2000 deg (i) Right Ascension, foreground QSOs (J2000) (pos.eq.ra;meta.main)
  DEJ2000 deg (i) Declination, foreground QSOs (J2000) (pos.eq.dec;meta.main)
  zspec   [0.6/4.2] Spectroscopic Redshift (src.redshift)
  rmag mag (n) [17/24.5] SDSS r band AB magnitude (phot.mag;em.opt.R)
  M1450 mag (n) [-27.8/-20.5] Absolute M1450 magnitude (phys.magAbs)
  Sep arcsec [3.1/80.4] Angular separation (pos.angDistance)
  Dprop Mpc [1.5/39.8] Transverse separation in situation proper distances; in proper Mpc units (pos.distance)
  GamHeQSO s-1 [6.8e-17/1.1e-06] HeII photoionization rate (phys.ionizParam.rad)
  Inst (char) Instrument used (CAHA 3.5/TWIN, VLT/VIMOS, NTT/EFOSC2 or Keck/LRIS; see the "Description" section above) (instr.setup)
  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)

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