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

  
J/A+A/644/A159
  The third realization of the ICRF, ICRF3 (Charlot+, 2020)
ReadMe+ftp
2020A&A...644A.159C
Similar Catalogs
Post annotation 		img(gal)
1.J/A+A/644/A159/table10Coordinates at S/X band for 4536 sources (4536 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)
  NSepup3 (char) indicates sources with normalized separation between the S/X and K band, X/Ka band or Gaia-CRF2 positions > 3 (meta.ref.url)
  ICRF (char) International Celestial Reference Frame name, (JHHMMSS.s+DDMMSS) (Note 1)   (meta.id;meta.main)
  IERS (char) (i) International Earth Rotation and Reference Systems Service name (HHMM+DDd, B1950 equinox) (Note 2)   (meta.id)
  Cat (char) [D] ICRF3 source category (Note 3)   (meta.note)
  fVLBA (char) [V] Flag signaling that the observations are solely from the VLBA (Note 4)   (meta.note)
  RAICRS "h:m:s" (i) Right ascension (ICRF) at Ep=2015.0 (pos.eq.ra;meta.main)
  DEICRS "d:m:s" (i) Declination (ICRF) at Ep=2015.0 (pos.eq.dec;meta.main)
  e_RAICRS s Right ascension uncertainty (stat.error;pos.eq.ra)
  e_DEICRS arcsec Declination uncertainty (stat.error;pos.eq.dec)
  Corr  Correlation coefficient between right ascension and declination (stat.correlation)
  Ep d Mean epoch of the sessions in which the source was observed (Note 5)   (time.epoch)
  Of d Epoch of first session in which the source was observed (Note 5)   (time.epoch)
  Ol d Epoch of last session in which the source was observed (Note 5)   (time.epoch)
  Nses  Number of sessions in which the source was observed (meta.number)
  Ndel  Number of delay observations used to estimate the source position (meta.number)
  Nrat  Number of delay rate observations used to estimate the source position (meta.number)
  _RA.icrs "h:m:s" (n)(i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
  _DE.icrs "d:m:s" (n)(i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)

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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