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/A+A/330/108
  ROSAT detected quasars. II. (Yuan+ 1998)
ReadMe+ftp
1998A&A...330..108Y
Similar Catalogs
Post annotation 		img(gal)
1.J/A+A/330/108/table1ROSAT detected radio-quiet quasars (846 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)
  IAU (char) IAU name of the object (meta.id;meta.main)
  n_IAU (char) [ *%?!] A flag for classification (Note)   (meta.note)
  VV93 (char) Alternative name from VV93 (Cat. VII/166) (meta.id)
  RAJ2000 "h:m:s" (i) Right Ascension J2000 (hours) (pos.eq.ra;meta.main)
  DEJ2000 "d:m:s" (i) Declination J2000 (Sign or blank) (pos.eq.dec;meta.main)
  z  (n) Redshift (Note)   (src.redshift)
  Vmag mag (n) Magnitude from VV93 (Cat. VII/166) (Note)   (phot.mag;em.opt.V)
  FX 10-12mW/m2Unabsorbed X-ray flux density (0.1-2.4keV) (phot.flux;em.X-ray)
  e_FX 10-12mW/m2Error of X-ray flux density (Note)   (stat.error)
  Gfree  (n) X-ray photon index (free fitted NH) (Note)   (spect.index)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  E_Gfree  (n) Positive error of photon index Gfree (Note)   (stat.error)
  e_Gfree  (n) Negative error of photon index Gfree (Note)   (stat.error)
  NH 10+20cm-2(n) X-ray absorbing column density (phys.columnDensity)
  E_NH 10+20cm-2(n) Positive error of column density (Note)   (stat.error)
  e_NH 10+20cm-2(n) Negative error of column density (Note)   (stat.error)
  Ggal  (n) X-ray photon index (Galactic absorption) (Note)   (spect.index)
  E_Ggal  (n) Positive error of photon index Ggal (Note)   (stat.error)
  e_Ggal  (n) Negative error of photon index Ggal (Note)   (stat.error)
  NHgal 10+20cm-2(n) Galactic column density (Note)   (phys.columnDensity)
  Com (char) [S P] Notes on the X-ray detection (Note)   (meta.note)
  Ref (char) Reference for the quoted spectral index (Note)   (meta.ref)

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