VizieR

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

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

  
VII/158
  Revised and Updated Catalog of Quasi-stellar Objects (Hewitt+ 1993)
ReadMe+ftp
1993ApJS...87..451H
Similar Catalogs
Post annotation 		img(gal)
1.VII/158/table1The catalogue (22484 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)
  M  (n)1 for the rows belonging to the original table 1 (main description of the QSO) (meta.note)
  CooDes (char) Designation based on 1950 Coordinates (Note 1)   (meta.id;meta.main)
  RA1950 "h:m:s" (i) Right Ascension 1950 (Note 1)   (pos.eq.ra;meta.main)
  DE1950 "d:m:s" (i) Declination 1950 (Note 1)   (pos.eq.dec;meta.main)
  BLLac (char) [B] "B" indicates a BL Lac object (Note 1)   (meta.note)
  Sel (char) [RXSVCO +] Selection technique(s) (Note 2)   (meta.note)
  Id (char) Other name (meta.id)
  V mag (n) Apparent magnitude; often only mpg (phot.mag;em.opt.V)
  var (char) [*] * indicates a variability (meta.note)
  B-V mag (n) B-V (phot.color;em.opt.B;em.opt.V)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  U-B mag (n) U-B (phot.color;em.opt.U;em.opt.B)
  z(em)  (n) Emission redshift (src.redshift)
  u_z(em) (char) [)] Uncertainty flag on z(em) (meta.code.error)
  n_z(em) (char) [*+] Note on z(em) (Note 3)   (meta.note)
  Element (char) Emission line on which the redshift is based (element name) (meta.id;phys.atmol.element)
  Wl 0.1nm (n) Wavelength of Emission element (Angstroem) (em.wl)
  z(abs)  (n) Absorption redshift (src.redshift)
  r_Id  (n) Reference for identification (meta.ref;pos.frame)
  r_z(em)  (n) Reference for emission redshift (meta.ref;pos.frame)
  ref_b (char) [b*] Addition to r_z(em) (Note 5)   (meta.code)
  r_var  (n) Reference for variability (meta.ref;pos.frame)
  r_Sel  (n) Reference for Radio (meta.ref;pos.frame)
  r_z(abs)  (n) Reference for absorption redshift (meta.ref;pos.frame)
  Notes (char) Notes (Note 4)   (meta.note)
  _RA.icrs "h:m:s" (n)(i) Right ascension (ICRS) (computed by VizieR, not part of the original data) (pos.eq.ra)
  _DE.icrs "d:m:s" (n)(i) Declination (ICRS) (computed by VizieR, not part of the original data) (pos.eq.dec)

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