Table 1
The catalogs used in this study.
| Solution ID | Acronym | Software | No sources | First / median / last epochs | No delays | Median sep |
|---|---|---|---|---|---|---|
| Input catalogs | ||||||
| asi2024a | ASI | Calc/Solve | 5313 / 4496 | 1980.28 / 2017.08 / 2024.49 | 19.93 × 106 | 0.152 mas |
| aus2025a | AUS | OCCAM | 5626 / 4439 | 1993.38 / 2017.31 / 2024.99 | 13.77 × 106 | 0.318 mas |
| bkg2023b | BKG | Calc/Solve | 4842 / 4133 | 1984.01 / 2015.97 / 2023.72 | 16.08 × 106 | 0.240 mas |
| opa2025a | OPA | Calc/Solve | 5712 / 4526 | 1979.59 / 2017.35 / 2025.03 | 18.09 × 106 | 0.155 mas |
| usn2024b | USN | Calc/Solve | 5802 / 4533 | 1980.28 / 2017.52 / 2024.75 | 19.05 × 106 | 0.148 mas |
| vie2023a | VIE | VieVS | 5696 / 4533 | 1979.59 / 2017.06 / 2023.99 | 18.83 × 106 | 0.158 mas |
| Reference catalog | ||||||
| ICRF3 S/X | ICRF3X | Calc/Solve | 4536 | 1979.59 / 2014.01 / 2018.24 | 13.19 × 106 | — |
Notes. Columns indicate (from left to right): IVS solution identifier; present study designation; number of sources (in the catalog and in common with the ICRF3 S/X); first, median, and last session epoch and number of delays used in the input and reference catalogs. The rightmost column gives the median separation with the ICRF3 S/X for the sources in common to all catalogs.
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