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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/MNRAS/348/857
  Radio-loud QSOs at z∼4 (Holt+, 2004)
ReadMe+ftp
2004MNRAS.348..857H
Similar Catalogs
Post annotation 		img(gal)
1.J/MNRAS/348/857/table1(c)High-redshift radio QSOs in FIRST (VIII/71) (20 rows)
2.J/MNRAS/348/857/table2(c)Candidates which are not z>3.6 QSOs (59 rows)
Help Xmatch is

Simple ConstraintList Of Constraints
 
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)
   (ALL)Sample (char) [ABC] Sample designation (Note 1)   (meta.id)
   (ALL)RAJ2000 "h:m:s" (i) Optical right ascension (J2000.0) (pos.eq.ra;meta.main)
   (ALL)DEJ2000 "d:m:s" (i) Declination (J2000.0) (pos.eq.dec;meta.main)
   (ALL)S1.4GHz mJy (n) FIRST 1.4GHz flux density (integrated for S1.4GHz>10mJy, otherwise peak) (phot.flux.density;em.radio.750-1500MHz)
  (1)S4.85GHz mJy (n) Integrated Effelsberg 4.85GHz flux density (phot.flux.density;em.radio.3-6GHz)
  (1)S10.6GHz mJy (n) Integrated Effelsberg 10.6GHz flux density (phot.flux.density;em.radio.6-12GHz)
  (1)Sp+Index  (n) Radio spectral index alpha (spect.index)
  (1)logLR [W/Hz] Radio luminosity (Note 2)   (phys.luminosity)
   (ALL)dR-O arcsec Radio-optical position difference (pos.angDistance)
   (ALL)Emag mag APM POSS-I E magnitude (phot.mag;em.opt.R)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
   (ALL)l_O-E (char) Limit flag on O-E (meta.code.error)
   (ALL)O-E mag APM POSS-I O-E colour (phot.color;em.opt.B;em.opt.R)
  (1)Rmag mag (n) JKT (Jacobus Kapteyn Telescope) R magnitude (phot.mag;em.opt.R)
  (1)Imag mag (n) JKT (Jacobus Kapteyn Telescope) I magnitude (phot.mag;em.opt.I)
   (ALL)z  Redshift (src.redshift)
   (ALL)e_z  rms error on redshift (stat.error)
  (1)l_EWLya+NV (char) Limit flag on EWLya+NV (meta.code.error)
  (1)EWLya+NV nm (n) Approximate rest-frame Lyα+NV equivalent width, ±30% (spect.line.eqWidth)
  (1)u_EWLya+NV (char) [?] Uncertainty flag on EWLya+NV (meta.code.error)
  (1)DA  Continuum decrement across Lyα line (Section 4.1.2 of the paper) (spect.line.width)
   (ALL)Notes (char) Notes (meta.note)
   (ALL)FIRST (char) Show FIRST data (meta.ref)
  (2)Type (char) [QGS?*] Type of object (Q = QSO, G = Galaxy, ? = probable galaxy, * = star, S not explained) (src.class)

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