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Table A.1

Parameters of 6.7 GHz methanol maser cloudlets used in the proper motion studies. The coordinates are first-epoch data and are relative to averaged proper motions of persistent cloudlets with linear motions; the same as in Figs 1-5. The (0,0) points are listed for each target. Cloudlets that are marked by the superscript n were not used in the proper motion calculations due to their non-linear motions. The full-width at the half-maximum is given for the Gaussian fit of each cloudlet; – denotes a non-Gaussian profile. In the case of G31.047+00.356, we list parameters for maser spots (see explanations in Sect. 3). Data for G23.657−00.127 are presented in more detail in Table A.1 in Bartkiewicz et al. (2020)

Vp(km s−1 ) ΔRA (mas) ΔDec (mas) μRA(mas yr−1 ) μDec (mas yr−1 ) Flux density FWHM
E1 E2 (Jy beam−1 ) E3 E1 E2 (km s−1) E3
G23.207−00.377 RA=18h34m55s.20790, Dec=−08°49’11″.8421(J2000)
72.53 −38.824 +14.095 −0.04 ± 0.01 +0.19 ± 0.01 0.319 0.204 0.365 0.35 0.39 0.30
73.84 +30.114 −32.762 +0.17 ± 0.01 +0.09 ± 0.02 0.446 1.195 0.319 0.28 0.29 0.32
74.85 +37.313 −48.534 +0.16 ± 0.01 +0.04 ± 0.04 0.787 0.444 0.457 0.33 0.51 0.61
0.56 0.53
75.07 +62.927 −60.272 +0.05 ± 0.03 −0.10 ± 0.01 0.462 0.384 0.421 0.29 0.32 0.33
75.42 −206.951 −75.988 −0.17 ± 0.01 −0.00 ± 0.01 2.040 1.343 1.183 0.36 0.39 0.39
75.51 +119.937 −91.755 +0.19 ± 0.01 −0.15 ± 0.01 1.356 1.049 0.807 0.35 0.54 0.42
75.69 −158.935 −191.421 −0.21 ± 0.04 −0.27 ± 0.05 0.130 0.307 0.371 0.32 0.29 0.29
76.30n +50.295 −54.298 −0.13 ± 0.04 −0.08 ± 0.01 10.212 2.264 1.914 0.40d 0.36 0.35
76.66n +52.242 −43.572 +0.54 ± 0.11 +0.22 ± 0.03 3.528 3.978 0.40d 0.47 0.44
77.14 +62.746 −49.179 +0.06 ± 0.01 −0.02 ± 0.01 18.302 5.211 4.615 0.36 0.50 0.65
77.49 +92.042 −46.048 +0.05 ± 0.01 −0.11 ± 0.01 7.326 3.939 4.621 0.45 0.55 0.37
0.36
77.93 +74.636 −52.639 −0.03 ± 0.03 −0.07 ± 0.02 6.301 2.607 3.052 0.45 0.39 0.37
0.69 0.80
78.59 +106.129 −21.073 −0.05 ± 0.01 −0.15 ± 0.03 0.607 0.604 0.609 – 0.41 0.42
78.59 +116.001 −17.315 +0.09 ± 0.01 −0.08 ± 0.03 0.949 0.370 0.317 0.54 0.40 0.49
79.20 +113.382 −18.202 +0.05 ± 0.01 −0.06 ± 0.01 2.835 1.765 1.608 0.31 0.19 0.30
79.38 −73.128 +141.111 −0.06 ± 0.01 +0.05 ± 0.01 0.709 0.268 0.340 0.23 0.32 >1
0.21
79.86 −94.615 +184.008 −0.08 ± 0.01 +0.06 ± 0.04 0.260 0.298 0.329 0.22 0.33 0.31
79.91 +4.970 +20.324 +0.03 ± 0.01 +0.11 ± 0.03 0.546 2.282 1.963 0.31 0.31 0.33
80.78n −100.734 +97.145 −0.20 ± 0.05 +0.18 ± 0.03 12.578 4.050 2.918 0.32 0.35 0.53
0.72 0.33
81.84 −77.854 +90.433 −0.15 ± 0.04 +0.20 ± 0.02 13.482 4.664 5.733 0.52 0.63 0.48
81.83 −94.597 +95.504 +0.23 ± 0.01 +0.17 ± 0.01 4.189 4.162 4.647 0.35 − 0.24
82.76 −89.469 +96.954 −0.47 ± 0.04 +0.10 ± 0.01 2.309 9.441 14.526 0.41 0.37 0.38
0.57
84.87 +14.185 +62.763 +0.17 ± 0.01 −0.01 ± 0.01 1.584 1.920 2.485 0.34 0.40 0.40
0.42
G23.389+00.185 RA=18h33m14s.32364, Dec=−08°23’57″.5461 (J2000)
72.39 −62.001 +40.339 −0.01 ± 0.01 −0.03 ± 0.01 7.076 4.943 6.594 0.46 0.32 0.30
73.62 +69.944 +43.180 +0.26 ± 0.06 +0.65 ± 0.10 9.712 1.128 2.481 0.16 0.37 0.40
0.51
74.00 +65.994 +36.741 +0.02 ± 0.02 −0.16 ± 0.06 3.215 3.944 5.206 0.40 0.25 0.27
0.31
74.50 −26.090 +42.224 +0.10 ± 0.01 −0.08 ± 0.03 5.628 2.979 3.739 0.30 0.40 0.39
74.81 +48.317 +3.084 −0.02 ± 0.01 +0.00 ± 0.01 20.440 12.713 14.389 0.35 0.37 0.35
0.42 0.33 0.40
75.34 +16.794 +73.460 +0.00 ± 0.01 +0.08 ± 0.01 23.521 14.063 16.308 0.24 0.28 0.28
0.37
76.04 −75.817 −81.790 −0.12 ± 0.04 −0.05 ± 0.03 4.859 5.303 7.542 0.16
0.42 0.42 0.33
0.29 0.33 0.36
76.13 −59.326 −71.429 −0.26 ± 0.08 −0.26 ± 0.01 6.771 4.557 5.545 0.36 0.51 0.45
0.14
77.01 +37.558 −1.593 +0.04 ± 0.01 −0.03 ± 0.02 0.693 0.338 0.396 0.30 0.31 0.30
77.45 −15.369 −84.216 −0.01 ± 0.01 −0.13 ± 0.01 0.533 0.216 0.306 0.23 0.27 0.26
G28.817+00.365 RA=18h42m37.34596, Dec=−03°29’40″.9556 (J2000)
87.73 −42.815 −22.111 −0.04 ± 0.04 +0.07 ± 0.05 0.306 0.178 0.211 – 0.23 0.23
89.75 +28.677 +27.623 −0.06 ± 0.00 −0.33 ± 0.07 0.660 0.264 0.278 0.68 0.37 0.64
0.25
90.01 −60.296 +14.278 −0.01 ± 0.05 −0.07 ± 0.02 0.124 0.085 0.089 – – 0.21
90.45n +29.833 +33.252 +0.07 ± 0.01 +0.10 ± 0.01 2.774 1.245 1.479 0.56 0.54 0.31
91.33 +33.482 +52.819 +0.03 ± 0.01 +0.31 ± 0.08 2.309 1.360 1.365 0.32 0.22 0.26
0.31 0.26
0.32 0.32
92.39n +24.487 +43.176 −0.17 ± 0.14 +0.57 ± 0.18 0.371 0.209 0.194 0.43 0.88 0.27
0.44 0.40
92.65 +27.411 +60.646 +0.09 ± 0.01 +0.03 ± 0.03 1.924 1.129 1.292 0.38 0.40 0.42
G31.047+00.356 (spots) RA=18h46m43.85452, Dec=−01°30’54″.1557 (J2000)
78.07 +7.095 +8.027 −0.02 ± 0.01 +0.02 ± 0.05 0.255 0.108 0.068
78.25 +6.715 +6.818 −0.03 ± 0.01 −0.01 ± 0.01 0.045 0.122 0.111 – 0.46 0.38
78.42n +7.633 +5.233 −0.20 ± 0.11 +0.14 ± 0.07 0.122 0.067 0.114
78.60n +6.881 +4.722 −0.11 ± 0.06 +0.10 ± 0.05 0.076 0.082 0.073
78.78 +6.638 +4.113 −0.01 ± 0.03 +0.09 ± 0.01 0.300 0.228 0.174
78.95 +6.758 +3.839 −0.00 ± 0.01 +0.08 ± 0.01 0.610 0.540 0.492
79.13 +6.625 +3.621 +0.06 ± 0.02 +0.06 ± 0.01 0.981 0.826 0.996 0.71 0.69 0.71
79.30 +6.593 +3.584 +0.07 ± 0.02 +0.02 ± 0.01 0.943 0.756 0.930
79.48 +6.807 +3.180 +0.03 ± 0.00 +0.01 ± 0.02 0.641 0.562 0.689
79.65 +7.274 +3.109 −0.01 ± 0.01 −0.08 ± 0.05 0.433 0.463 0.597
79.83 +7.893 +2.172 +0.00 ± 0.00 −0.03 ± 0.03 0.278 0.604 0.641
80.00 +8.222 +2.092 +0.02 ± 0.01 −0.04 ± 0.02 0.382 1.090 1.040 0.34 0.60 0.54
80.18 +8.406 +2.072 +0.03 ± 0.01 −0.03 ± 0.03 0.471 1.657 1.880
80.36 +8.650 +2.197 −0.00 ± 0.02 −0.08 ± 0.06 0.467 1.487 1.763
80.53 +8.212 +1.292 +0.02 ± 0.00 −0.03 ± 0.02 0.943 1.453 1.464
80.71 +7.973 +0.656 +0.01 ± 0.01 −0.04 ± 0.01 1.580 1.664 1.867 0.81 0.21 0.18
80.88 +7.830 −0.395 +0.02 ± 0.01 −0.03 ± 0.01 1.351 1.416 1.584 0.65 0.61
81.06 +7.427 −0.946 +0.04 ± 0.01 −0.05 ± 0.01 1.142 1.274 1.484
81.06 −51.775 −28.434 +0.17 ± 0.02 +0.07 ± 0.05 0.198 0.232 0.357 - 0.29 0.29
81.23 +6.718 −1.695 +0.06 ± 0.01 −0.05 ± 0.01 0.920 0.903 0.965
81.41 +5.790 −2.762 +0.12 ± 0.01 +0.02 ± 0.01 0.357 0.393 0.393
82.82 −39.990 −6.322 −0.28 ± 0.01 +0.07 ± 0.01 0.115 2.263 3.496
82.99 −39.859 −6.220 −0.30 ± 0.01 +0.04 ± 0.01 0.528 1.019 0.560 0.28 0.29 0.31
G31.581+00.077 RA=18h48m41.94582, Dec=−01°10’2″.4794 (J2000)
91.60n +34.405 −128.074 −0.00 ± 0.11 +0.21 ± 0.06 0.299 0.102 0.110 0.31 0.34 0.37
95.64 −71.099 −48.651 −0.01 ± 0.00 −0.04 ± 0.00 2.630 1.083 1.822 0.33 0.34 0.33
97.75 −132.089 +8.874 −0.01 ± 0.00 +0.06 ± 0.00 0.266 0.132 0.211 – 0.24 0.22
98.01n −33.952 −55.679 −0.01 ± 0.06 +0.04 ± 0.02 0.741 0.202 0.237 0.29 0.93* 0.30
98.45 −38.817 −52.326 +0.07 ± 0.04 −0.10 ± 0.05 0.319 0.141 0.247 0.36 0.93* 0.31
98.80 +78.855 +45.003 −0.04 ± 0.01 +0.02 ± 0.03 1.628 1.078 2.020 0.30 0.39 0.33
99.24 +82.712 +39.239 −0.04 ± 0.03 +0.07 ± 0.06 0.847 0.367 0.737 0.30 0.32 0.31
99.68 +80.440 +7.862 +0.03 ± 0.03 −0.01 ± 0.02 0.749 0.517 1.081 0.37 0.45 0.40

Notes. d in G23.207−00.377 denotes a case when a single Gaussian profile in the first epoch (E1) becomes a double in E2 and E3.

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