VizieR

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

VizieR

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/losqsoOverview of the FUV spectra, HeII sightlines and the number of foreground quasars for the 22 background quasar sightlines (tables 1 and 2) (22 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 (meta.id;meta.main)
  Inst (char) HST instrument +grating (instr)
  R   [1000/18000] Dispersion (instr.dispersion)
  HST   [9350/13013] HST Program Id (meta.id;obs)
  PI (char) HST Program PI (obs.observer)
  Ref (char) Reference(s) (Note 1)   (meta.ref;pos.frame)
  RAJ2000 "h:m:s" (i) Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
  DEJ2000 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
  zBG   [2.7/4] Spectroscopic redshift of HeII-transparent QSO (src.redshift;pos.heliocentric)
  N-VLT  (n) [0/2] Number of quasars detected with VLT/VIMOS+LBT/LBC (meta.number)
  N-NTT  (n) [0/2] Number of quasars detected with NTT/EFOSC2 (meta.number)
  N-CAHA  (n) [0/5] Number of quasars detected with CAHA/TWIN (meta.number)
  N-SDSS  (n) [0/7] Number of quasars used from SDSS (Note 1)   (meta.number)
  N-Lit  (n) [1/2] Number of quasars used from the Literature (Note 2)   (meta.number)
  Nfg  (n)Number of foreground quasars in this field (link to table 3) (meta.number)
  Sloan  Display the online SDSS data for the nearest object (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)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
Adapt form
 Display your selection only Reset to default columns
usage  Display UCD1+    UCD1  
elapse time 1