J/A+A/493/317ivo://CDS.VizieR/J/A+A/493/317doi:10.26093/cds/vizier.34930317CDSLambert S.B.Gontier A.-M.2026-01-20T12:10:38Z2009-02-07T21:06:55ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.froptical-observationcatalogsastrometryvery-long-baseline-interferometryThe most accurate realization of a quasi inertial reference frame, the International Celestial Reference Frame (ICRF), is made of 212 defining extragalactic radio sources whose coordinates are determined using VLBI observations. Recent studies demonstrated however that using other sets of sources could improve the frame stability. This study examines a simple radio source selection scheme to define celestial reference frame axes more stable than the ones as currently defined by the ICRF. After having derived source coordinate time series from 26 years of VLBI observations, we select the most suitable sources on the basis of their positional variability (rms and slope), and observational history. We determine the axis stability of the frame defined by the selection, as well as its suitability for global geodetic VLBI analyses, i.e., determination of Earth orientation parameters and source and station coordinates.2009A&A...493..317Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/493/317CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/251 : VLBI International Celestial Reference Frame (ICRF) (Ma+, 1997)J/AJ/127/3587 : VLBI ICRF. II (Fey+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/493/317https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/493/317http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/493/317https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/493/317https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/493/317http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/493/317GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/493/317/sources (List of all AMS subsets (sources subsets AMS 196, 200, 262 and 267))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/493/317/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/493/317/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/493/317/sources?GETtext/xml+votable180.050000true1.5578870375-6.39314870.0055555555555555566/18 60 110 124 180 304 421 532 911 1084-1085 1154 1233 1546 2143 2721 2836 3024 3096 3820 4027 4054 4436 4448 4696 4770 4820 5306 5371 5423 5448 5458 5766 6033 6164 6167 6548 6641 6853 6948 6996 7181 7346 7389 7570 7623 7653 7851 7857 7896 8057 8112 8299 8345 8615 8717 8858 9403 9460 9612 9632 9676 9723 9813 10078 10163 10228 10321 10422 10548 10798 11216 11430 11461 11715 12173 12218 12241 12301 12352 12475 12580 12599 13156 13352 13496 13722 13927 14338 14520 14842 15286 15494 15852 16027 16059 16093 16113 16298 16592 17019 17215 17351 17414 17857 17909 18035 18037 18084 18214 18242 18271 18378 18506 18624 18661 18669 18718 18755 18907 19166 19190 19271 19398 20144 20213 20468 20476 20657 20935 21121 21163 21266 21437 21758 21935 21968 21972 22363 22375 22396 22433 22501 22659 22965 23014 23099 23121 23127 23323 23478 23786 23882 24084 24123 24453 24608 24809 24845 25016 25196 25255-25256 25302 25503 25630 26083 26115 26303 26363 26550 26983 27060 27423 27446 27583 27765 27773 27909 27926 28208 28339 28383 28479 28492 28628 29016 29218 29384 29570 29675 29795 31176 31190 31211 31334 31355 31391 31430 31529 31894 32325 32764 33549 33560 33825 33827 34038 34123 34264 34517 34571 34699 34931 35079 35440 35801 36188 36785 36941 37385 37480 37994 38579 38763 39377 39672 40060 40344 40692 41511 42901 42980 43366 43399 43822 43936 44043 44147 44247 44776 44805 44832 44908 45011 45110 45621 46055 46251 46310 46337 46373 46764 46964 47016 47268 47534 47540 47747 47941 48023 48123 48589 48798 48965https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/493/317?format=asciiOpticalRadiodefaultJ/A+A/493/317/sourcesList of all AMS subsets (sources subsets AMS 196, 200, 262 and 267)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_ICRFSummary of AMS subsets the source is included inmeta.noteintnullableICRFRadio source ICRF designation, JHHMMSS.s+DDMMSS (1)meta.id;meta.maincharIERSRadio source IERS designation, HHMM+DDd (B1950) (2)meta.idcharRAJ2000Hour of right ascension (J2000) (3)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000) (3)pos.eq.dec;meta.maine_RAJ2000Error in right ascension (3)sstat.error;pos.eq.radoublee_DEJ2000Error in declination (3)arcsecstat.error;pos.eq.decdouble