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Table 1

Estimated parameters (μas/yr) of the proper motion field.

DR DRQ DRQ11

No. sources 429 426 555

Dipole
d 1 −0.4 ± 0.7 0.7 ± 0.8 0.7 ± 0.9
d 2 −5.7 ± 0.8 −6.2 ± 0.9 −6.2 ± 1.0
d 3 −2.8 ± 0.9 −3.3 ± 1.0 −3.3 ± 1.0
Amplitude 6.4 ± 1.1 7.1 ± 1.3 7.1 ± 1.4
Direction in α (°) 266 ± 7 277 ± 7 277 ± 9
Direction in δ (°) −26 ± 7 −28 ± 7 −28 ± 8

Rotation
r 1 −1.1 ± 0.9 −0.5 ± 1.2 −2.4 ± 0.8
r 2 1.4 ± 0.8 1.8 ± 1.3 0.4 ± 1.0
r 3 0.7 ± 0.6 0.8 ± 1.4 0.8 ± 0.7

Quadrupole
1.3 ± 1.0 2.8 ± 1.2
0.3 ± 0.8 −0.7 ± 0.9
1.7 ± 1.0 4.1 ± 1.3
0.9 ± 1.1 1.7 ± 1.2
−1.8 ± 1.0 −0.6 ± 1.1
2.3 ± 0.9 2.0 ± 1.1
0.5 ± 0.5 0.8 ± 0.5
−1.0 ± 0.4 0.3 ± 0.5
2.3 ± 0.6 1.2 ± 0.6
−1.3 ± 0.6 −0.3 ± 0.6

Postfit rms 15.86 15.64 21.56
χ 2 1.02 1.00 1.91

Notes. The rightmost column (DRQ11) reports the TLG11 Table 3 values obtained using quadrupole Eqs. (5) and (6). Uncertainties are 1σ.

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