VizieR Online Data Catalog: The third realization of the ICRF, ICRF3 (Charlot+, 2020)
Abstract
Tables 10-12 present the coordinates of the 4588 sources comprised in ICRF3 along with their uncertainties. Table 10 is for the S/X band frame and includes 4536 sources. Table 11 is for the K band frame and includes 824 sources. Table 12 is for the X/Ka band frame and includes 678 sources. Besides source coordinates, these tables also provide proper information to identity each source (ICRF designation and IERS name) and details about the VLBI sessions (first and last session in which a source was observed, mean epoch of the sessions, number of sessions), the observations (number of VLBI delays and delay rates used to estimate the source position), and the characteristics of the errors (correlation coefficient between right ascension and declination). Tables 14-16 list the sources for which the normalized separation between the S/X band position and (i) the K band position, (ii) the X/Ka band position, and (iii) the Gaia-CRF2 position, is above 3. Position differences are characterized by the right ascension and declination offsets and the length and direction of the offset vector joining the two positions being compared. The normalized separation is defined as the length of the offset vector divided by its formal uncertainty.
(6 data files).- Publication:
-
VizieR Online Data Catalog
- Pub Date:
- September 2020
- DOI:
- 10.26093/cds/vizier.36440159
- Bibcode:
- 2020yCat..36440159C
- Keywords:
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- VLBI;
- Radio sources;
- Positional data;
- Active gal. nuclei;
- QSOs