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Table A.1

Parameters of the cloudlets during the three maser transitions observed over a timespan of 1.1 yr.

ΔRA ΔDec Vp FWHM Sp Sf
(mas) (mas) (km s−1) (km s−1) (Jy beam−1) (Jy beam−1)
OH 1665 MHz (VLBA)
−14.954 −294.106 −7.42 0.146 0.310 0.318
−119.285 135.742 −10.27 0.892 0.525 0.484
−65.271 373.965 −12.12 − 0.22 −
61.145 247.472 −12.22 0.314 1.461 1.547
OH 1665 MHz (EVN)
−9.774 −300.027 −7.56 − 0.096 −
−115.510 130.847 −10.40 1.130 0.485 0.479
−49.913 372.111 −12.00 − 0.050 −
67.252 241.243 −12.33 0.567 0.744 0.773
H2O 22.2 GHz
−13.313 −74.900 −7.58 1.186 21.543 12.968
−204.755 41.600 −15.97 1.048 29.513 30.837
−202.988 36.955 −16.20 0.813 32.567 32.353
−205.331 40.530 −16.60 0.804 82.596 82.593
−197.815 39.607 −16.71 − 3.789 −
−181.082 7.593 −16.90 1.331 18.218 6.635
−205.179 39.908 −17.30 − 27.191 −
−195.511 30.094 −17.31 0.705 41.828 40.240
−179.586 5.135 −17.44 0.790 42.912 40.588
−179.410 3.670 −19.17 0.559 40.56 40.385
CH3OH 6.7 GHz epoch 4 (MJD 57 681)
99.886 −174.277 −7.13 − 8.865 −
88.092 −167.362 −7.21 0.287 1.741 1.656
97.987 −167.545 −7.36 0.332 15.630 16.429
117.979 −159.029 −7.39 0.246 0.652 0.674
65.320 −226.854 −7.40 − 0.434 −
109.386 −209.002 −7.40 0.275 3.782 3.891
100.701 −159.262 −7.73 0.295 0.969 0.939
92.954 −147.215 −7.85 − 0.105 −
82.251 −176.911 −8.06 0.442 0.101 0.101
65.986 −190.234 −8.55 0.311 0.189 0.200
−7.284 −127.389 −8.59 0.280 5.807 5.829
35.387 −147.094 −8.99 0.287 0.338 0.329
50.225 −206.324 −9.01 0.292 0.310 0.320
36.559 −270.120 −9.08 − 0.129 −
10.817 −160.301 −9.12 0.122 0.515 0.517
30.766 −198.142 −9.20 0.211 0.569 0.568
38.960 −209.079 −9.26 0.228 1.389 1.420
−302.581 −269.756 −10.91 0.215 0.328 0.382
−289.855 103.608 −14.95 − 0.082 −
−181.412 134.757 −16.33 0.598 0.112 0.114
−171.342 159.929 −16.47 0.749 1.102 0.956
−236.113 116.447 −16.58 0.510 2.974 2.859
−234.022 109.275 −16.87 − 0.412 −
−225.448 125.518 −16.90 0.364 0.230 0.262
−192.541 133.441 −16.91 0.285 0.595 0.592
−208.412 132.691 −17.11 0.361 0.165 0.154
CH3OH 6.7 GHz epoch 2 (MJD 57 444)
89.126 −168.899 −7.05 0.298 0.370 0.384
102.004 −173.640 −7.12 0.294 7.132 7.243
111.537 −153.678 −7.16 0.252 0.197 0.206
116.095 −206.232 −7.31 0.311 0.599 0.629
100.052 −167.717 −7.35 0.367 11.853 12.159
105.166 −211.788 −7.50 0.220 1.094 1.113
102.335 −159.127 −7.79 − 1.170 −
95.592 −146.682 −7.85 − 0.052 −
84.405 −176.262 −8.04 0.337 0.114 0.117
95.083 −162.762 −8.19 − 0.057 −
85.779 −159.710 −8.50 0.343 0.058 0.058
67.988 −189.282 −8.54 0.262 0.155 0.156
−6.336 −126.889 −8.59 0.293 1.195 1.197
27.436 −236.224 −8.92 − 0.107 −
51.579 −207.241 −9.01 0.202 0.313 0.309
39.190 −270.110 −9.08 − 0.115 −
32.588 −199.424 −9.25 − 0.077 −
40.285 −208.908 −9.28 0.223 0.669 0.650
304.259 −261.180 −10.96 0.227 1.408 1.427
−107.812 438.657 −13.70 0.223 0.645 0.670
144.067 345.034 −14.81 − 0.054 −
154.643 359.164 −15.50 0.267 1.269 1.330
157.612 345.580 −15.63 0.238 0.707 0.709

Notes. Coordinates (ΔRA, ΔDec) are relative to the map origin in Fig. 4. Most of cloudlets are parametrized with the fitted brightness (Sf) and line width at half maximum (FWHM). The 6.7 GHz maser cloudlets seen at epoch 2 are added to show their different appearance relative to that at the three other epochs.

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