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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/A+A/564/A117
  Binary quasars from LQAC-2 (Gattano+, 2014)
Post annotation
img(gal)
1.J/A+A/564/A117/tab3-6(c)Binary quasars (tables 3-6) (36 rows)
2.J/A+A/564/A117/table7(c)Binary quasars with the shortest separation, between 0" and 30" (160 rows)
Help Xmatch is

 
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)
  (1)T   [3/6] Table number (Note 1)   (meta.id;meta.main)
   (ALL)QSO1/2 (char) Quasar names (NNN+NNN_NNN/NNN) (meta.id;meta.main)
   (ALL)N  (n)Presence of this binary quasar in the different tables (meta.ref.url)
   (ALL)z1  Redshift of first quasar (src.redshift)
   (ALL)z2  Redshift of second quasar (src.redshift)
   (ALL)theta arcsec [2/22] Separation angle (pos)
   (ALL)U1mag mag (n) U magnitude of first quasar (phot.mag;em.opt.U)
   (ALL)U2mag mag (n) U magnitude of first quasar (phot.mag;em.opt.U)
  (1)Ref (char) Reference (Note 2)   (meta.ref;pos.frame)
  (1)Mult (char) [*+] Indicates the other quasar for the triplet (meta.code)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
   (ALL)QSO1 (char) First QSO name (NNN+NNN_NNN) (meta.id)
   (ALL)QSO2 (char) Second QSO name (NNN+NNN_NNN) (meta.id)
   (ALL)LQAC-2 (char) Display the LQAC-2 data (Souchay et al. 2012, J/A+A/537/A99) (meta.ref.url)
   (ALL)_RA deg (i) Position of first QSO from LQAC-2 (Cat. J/A+A/537/A99) (right ascension part) (pos.eq.ra;meta.main)
   (ALL)_DE deg (i) Position of first QSO from LQAC-2 (Cat. J/A+A/537/A99) (declination part) (pos.eq.dec;meta.main)
  (2)Ref1 (char) [A-M -] Reference (Note 1)   (meta.ref;pos.frame)
  (2)Ref2 (char) [A-M -] Reference (Note 1)   (meta.ref;pos.frame)
  (2)SeqU   [1/160] Sequential number in terms of increasing magnitude U of the brightest component (meta.id)
  (2)Seqz   [1/160] Sequential number in terms of decreasing value of z (meta.id)

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