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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/AJ/131/1872
  Fourth VLBA calibrator survey: VCS4 (Petrov+, 2006)
ReadMe+ftp
2006AJ....131.1872P
Similar Catalogs
Post annotation 		img(gal)
1.J/AJ/131/1872/table2The VCS4 catalog (292 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)
  Cat (char) [-C] Category (where C = calibrator) (meta.code)
  IVS (char) The IVS name (B1950), BHHMM-DDd (meta.id)
  VCS4 (char) The IAU name (J2000), JHHMM-DDMM (meta.id;meta.main)
  RAJ2000 "h:m:s" (i) Hour of Right ascension (J2000) (pos.eq.ra;meta.main)
  e_RAJ2000 mas Inflated error in Right Ascension (stat.error;pos.eq.ra)
  DEJ2000 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
  e_DEJ2000 mas Inflated error in Declination (stat.error;pos.eq.dec)
  Corr  Correlation between Right Ascension and Declination errors (stat.correlation)
  Nobs  Number of group delays used for position determination (meta.number)
  l_T8.6GHz (char) Upper limit flag on T8.6GHz (meta.code.error)
  T8.6GHz Jy (n) X-band (8.6GHz) total flux density integrated over entire map (Note 1)   (phot.flux.density;em.radio.6-12GHz)
  l_U8.6GHz (char) Upper limit flag on U8.6GHz (meta.code.error)
  U8.6GHz Jy (n) X-band (8.6GHz) unresolved flux density at longest VLBA baselines (Note 1)   (phot.flux.density;em.radio.6-12GHz)
  l_T2.3GHz (char) Upper limit flag on T2.3GHz (meta.code.error)
  T2.3GHz Jy (n) S-band (2.3GHz) total flux density integrated over entire map (Note 1)   (phot.flux.density;em.radio.1500-3000MHz)
  l_U2.3GHz (char) Upper limit flag on U2.3GHz (meta.code.error)
  U2.3GHz Jy (n) S-band (2.3GHz) unresolved flux density at longest VLBA baselines (Note 1)   (phot.flux.density;em.radio.1500-3000MHz)
  Band (char) Used band for position estimation (Note 2)   (em.freq)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
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usage  Display UCD1+    UCD1  
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