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Table 1
Global rotation of the ICRS around its X, Y, and Z axes due to the Galactic aberration effect.
| Catalog | No. | ωx | ωy | ωz | ωtot |
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| ICRF1 def | 212 | +1.07 ± 0.08 | −0.20 ± 0.08 | +0.18 ± 0.09 | 1.10 ± 0.14 |
| ICRF1 | 608 | +0.22 ± 0.05 | −0.03 ± 0.05 | +0.04 ± 0.05 | 0.22 ± 0.09 |
| ICRF2 def | 295 | +0.01 ± 0.07 | −0.14 ± 0.07 | +0.28 ± 0.07 | 0.31 ± 0.12 |
| ICRF2 | 3414 | +0.89 ± 0.02 | −0.08 ± 0.02 | +0.04 ± 0.02 | 0.89 ± 0.03 |
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| ICRF2 def (weighted) | 295 | +0.80 ± 0.13 | −0.73 ± 0.05 | +1.19 ± 0.05 | 1.61 ± 0.15 |
Notes. The first four lines are results from least squares fit without weights while the last line are the results from a weighted fit (see the text). The unit is μas yr-1.
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