VizieR

CfA VizieR . ADAC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . INASAN VizieR .
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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/169/173
  Observations & positions of 377 AGNs using VLBI (Xu+, 2025)
ReadMe+ftp
2025AJ....169..173X
Similar Catalogs
Post annotation 		img(gal)
1.J/AJ/169/173/table3Source position catalog from quad-band VLBI observations (377 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)
  ICRF (char) International Celestial Reference Frame identifier (JHHMMSS.s+DDMMSS) (meta.id;meta.main)
  IERS (char) International Earth Rotation and Reference Systems Service identifier (HHMM+DDd, B1950 equinox) (meta.id)
  Cat (char) Source category (Note 1)   (meta.code)
  RAICRS "h:m:s" (i) Hour of Right Ascension (ICRF) at Ep=2015.0 (pos.eq.ra;meta.main)
  DEICRS "d:m:s" (i) Degree of Declination (ICRF) at Ep=2015.0 (pos.eq.dec;meta.main)
  e_RAICRS s [5.5e-7/5e-5] Uncertainty in RAs (stat.error;pos.eq.ra)
  e_DEICRS arcsec [4.9e-6/7.7e-4] Uncertainty in DEs (stat.error;pos.eq.dec)
  Correl   [-0.9/0.4] Correlation between RA and DE coordinates (stat.correlation)
  <MJD> d [58861/60403] Mean Modified Julian Date (JD-2400000.5) of sessions where the source was observed (time.epoch;stat.mean)
  1stMJD d [58090/60403] Modified Julian Date (JD-2400000.5) of first session (time.epoch)
  LastMJD d [58910/60487] Modified Julian Date (JD-2400000.5) of last session (time.epoch)
  Nses   [1/174] Number of sessions (meta.number)
  Ndel   [20/96951] Number of group delay observations used to estimate its coordinates (meta.number)
  Nrat   [0/0] Number of delay rate observations used (Note 2)   (meta.number)
  Simbad  ask the Simbad data-base about this object (meta.ref.url)

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usage  Display UCD1+    UCD1  
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