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Table 3

Detailed results of parallax and proper motions measurements.

Maser Background vLSR Parallax μα μδ
source (km   s-1) (mas) (mas   yr-1) (mas   yr-1)
W 75N J2045+4341 9.56 0.750 ± 0.070     −2.01 ± 0.13  −4.33 ± 0.10
9.23 0.800 ± 0.067     −1.99 ± 0.11  −4.37 ± 0.11
9.23 0.730 ± 0.079     −2.03 ± 0.13  −4.37 ± 0.15
9.23 0.748 ± 0.062     −1.85 ± 0.09  −4.09 ± 0.19
8.88 0.879 ± 0.060     −1.97 ± 0.09  −4.42 ± 0.13
8.88 0.733 ± 0.068     −1.87 ± 0.11  −4.11 ± 0.13
6.77 0.764 ± 0.068     −2.18 ± 0.10  −4.17 ± 0.20
4.31 0.725 ± 0.072     −1.99 ± 0.11  −3.93 ± 0.17
3.26 0.746 ± 0.056     −1.89 ± 0.04  −3.94 ± 0.12
2.90 0.801 ± 0.056     −1.96 ± 0.08  −3.85 ± 0.17
Combined fit 0.772 ± 0.063 – –
Averaging data 0.772 ± 0.042    – –
 ⟨ μ ⟩   −1.97 ± 0.10  −4.16 ± 0.15
DR 21A J2045+4341  −5.54 0.751 ± 0.094     −2.67 ± 0.15  −3.22 ± 0.18
 −5.89 0.706 ± 0.087     −2.76 ± 0.14  −3.12 ± 0.15
 −6.59 0.709 ± 0.094     −2.94 ± 0.15  −2.94 ± 0.24
 −6.94 0.718 ± 0.068     −2.87 ± 0.11  −2.98 ± 0.17
 −9.05 0.710 ± 0.11     −2.59 ± 0.17  −3.87 ± 0.38
 −9.05 0.719 ± 0.11     −2.78 ± 0.17  −3.67 ± 0.35
 −9.40 0.600 ± 0.088     −3.26 ± 0.14  −4.37 ± 0.14
Combined fit 0.713 ± 0.091 – –
Averaging data 0.686 ± 0.060    – –
 ⟨ μ ⟩   −2.84 ± 0.15  −3.56 ± 0.25
DR 21B J2045+4341 3.96 0.705 ± 0.072     −2.88 ± 0.11  −4.30 ± 0.13
DR 21(OH) J2045+4341  −2.72 0.694 ± 0.100  −2.31 ± 0.16  −4.29 ± 0.16
 −3.07 0.533 ± 0.111  −3.11 ± 0.19  −4.51 ± 0.17
 −3.43 0.572 ± 0.104  −3.05 ± 0.16  −4.51 ± 0.22
Combined fit 0.591 ± 0.104 – –
Averaging data 0.622 ± 0.055    – –
DR 21a J2045+4341 0.666 ± 0.035 – –
 ⟨ μ ⟩   −2.84 ± 0.15  −3.80 ± 0.22
DR 20 J2045+4341  −3.78 0.634 ± 0.044     −3.16 ± 0.06  −4.82 ± 0.39
 −4.13 0.729 ± 0.056     −3.41 ± 0.08  −4.85 ± 0.42
 −4.48 0.726 ± 0.136     −3.29 ± 0.21  −4.81 ± 0.43
Combined fit 0.700 ± 0.085 – –
Averaging data 0.687 ± 0.038    – –
 ⟨ μ ⟩   −3.29 ± 0.13  −4.83 ± 0.26
IRAS 20290+4052 J2045+4341  −5.54 0.691 ± 0.060     −2.82 ± 0.09  −4.17 ± 0.50
 −5.89 0.785 ± 0.063     −2.85 ± 0.09  −4.11 ± 0.57
Combined fit 0.737 ± 0.062 – –
 ⟨ μ ⟩   −2.84 ± 0.09  −4.14 ± 0.54
AFGL 2591 J2007+4029 –4.58 0.267 ± 0.009  −0.656 ± 0.025  −5.906 ± 0.051
–5.00 0.308 ± 0.014  −1.083 ± 0.037  −4.019 ± 0.169
–5.84 0.290 ± 0.007  −1.271 ± 0.018  −4.152 ± 0.169
–7.53 0.317 ± 0.004  −0.955 ± 0.011  −4.715 ± 0.071
–7.95 0.280 ± 0.005  −1.385 ± 0.015  −5.745 ± 0.155
–10.90 0.348 ± 0.008  −0.884 ± 0.021  −4.398 ± 0.113
Averaging data 0.302 ± 0.009 – –
J2033+4000 –4.58 0.263 ± 0.003  −0.980 ± 0.009  −5.863 ± 0.169
–5.00 0.301 ± 0.009  −1.407 ± 0.025  −3.976 ± 0.025
–5.84 0.287 ± 0.001  −1.595 ± 0.002  −4.109 ± 0.028
-7.53 0.315 ± 0.001  −1.279 ± 0.004  −4.672 ± 0.141
–7.95 0.277 ± 0.001  −1.709 ± 0.001  −5.702 ± 0.031
-10.90 0.345 ± 0.002  −1.208 ± 0.005  −4.355 ± 0.078
Averaging data 0.299 ± 0.002 – –
Both QSOs Combined fit 0.300 ± 0.010 – –
 ⟨ μ ⟩   −1.20 ± 0.32  −4.80 ± 0.12

Notes. 

(a)

The resulting parallax fit for DR 21 is based on the averaged data of DR 21A, DR 21(OH), and the single maser spot of DR 21B.

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