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

  
I/325
  Radio-optical reference frame link (Zacharias+ 2013)
ReadMe+ftp
2013yCat.1325....0Z
Similar Catalogs
Post annotation 		img(gal)
1.I/325/icrf-u2(c)Results from UCAC2-type reductions of ICRF optical counterparts (sample in table 4 of paper) (666 rows)
2.I/325/icrf-u4(c)Results from UCAC4-type reductions of ICRF optical counterparts (sample in table 5 of paper) (682 rows)
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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. ((unassigned))
   (ALL)RAJ2000 "h:m:s" Right Ascension ICRS ((unassigned);(unassigned))
   (ALL)DEJ2000 "d:m:s" Declination ICRS ((unassigned);(unassigned))
   (ALL)Dist mas [0/1821] Distance between the optical and radio positions ((unassigned))
   (ALL)dRA* mas Distance(optical-radio) in RA*cos(Dec) ((unassigned);(unassigned))
   (ALL)dDec mas Distance(optical-radio) in Dec ((unassigned))
   (ALL)eRA mas [4/250] total, formal error of optical position (RA*cos(Dec)) ((unassigned);(unassigned);(unassigned))
   (ALL)eDE mas [4/250] total, formal error of optical position (Dec) ((unassigned);(unassigned);(unassigned))
   (ALL)sRA  ratio dRA*/eRA (position difference in RA in {sigma}s) ((unassigned))
   (ALL)sDE  ratio dDE/eDE (position difference in Dec in {sigma}s) ((unassigned))
   (ALL)eRad mas (n) error of radio position (per coordinate) ((unassigned);(unassigned);(unassigned))

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
   (ALL)Nccd  number of deep CCD exposures used ((unassigned))
   (ALL)Nr*  average number of reference stars per deep exposure used ((unassigned))
   (ALL)Nrx  average number of reference stars excluded ((unassigned))
   (ALL)err  mean "plate" solution error of individual deep CCD exposures ((unassigned))
   (ALL)S/N   [1/1639] Approximate signal/noise ratio of target on individual deep CCD ((unassigned);(unassigned))
   (ALL)mag mag (n) Optical brightness from LQAC-2 (J/A+A/537/A99) ((unassigned);(unassigned))
   (ALL)z  (n) [0/5] Redshift from LQAC-2 (J/A+A/537/A99) ((unassigned))
   (ALL)T   [0/3] Object type: 0=unknown, 1=AGN, 2=BL-Lac, 3=QSO (from Veron's 13th ed. (VII/258) ((unassigned))
   (ALL)S  (n) [0.8/7.2] Radio X-band (8-12GHz) structure index from Bordeaux database: 1=very good, 2=good, 3=use with caution, 4=unacceptable ((unassigned))
   (ALL)U   [2/4] UCAC-type reductions (2 or 4) ((unassigned);(unassigned))
   (ALL)Rname (char) B1950 coordinate based name of target ((unassigned);(unassigned))
   (ALL)R  (n)Number of results for this source with UCAC2- and UCAC4-type reductions ((unassigned))
   (ALL)Run (char) [abo-zJ] Code of deep CCD observing run (Note 1)   ((unassigned);(unassigned))

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
   (ALL)n_Run (char) [rc] Type of target: r=regular target, c=also used as calibration field ((unassigned))
   (ALL)Q (char) [ufplgn] Quality letter of optical image (Note 2)   ((unassigned);(unassigned);(unassigned))
   (ALL)M  (n)Existence in Vérons' catalogue (VII/258) and/or LQAC-2 (J/A+A/537/A99) within 3arcsec ((unassigned))
   (ALL)Notes (char) Remarks; if a double the separation (pixel) and flux ratio (source/companion) is given ((unassigned))
   (ALL)SimbadName (char) Designation understandable by the Simbad data-base ((unassigned))

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
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 Display your selection only Reset to default columns
usage  Display UCD1+    UCD1  

The following problems were encountered in this VizieR run:
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If you can't find a solution, report to CDS and insert into your message the following details:

.errorfile=/tmp/VR2001809.err (2026-08-12T21:22:50)
-3
-source=I/325
-ref=VIZ6a7ce42a1e8b91
elapse time 0
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