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Table 4

22 GHz H2O maser parameters.

Feature Epochs of I peak V LSR Δx Δy V x V y
number detection (Jy beam-1) (km s-1) (mas) (mas) (km s-1) (km s-1)

0 1, 2, 3, 4 ... 98.4 173.65  ±  0.06 767.21  ±  0.06 0.0  ±  0.0 0.0  ±  0.0
1 1, 2, 3, 4 108.04 98.0 0.00  ±  0.00 0.00  ±  0.00 0.6  ±  5.7 −30.7  ±  5.9
2 1, 2, 3, 4 30.13 97.5 760.41  ±  0.08 211.81  ±  0.08 −13.3  ±  5.7 1.3  ±  5.8
3 1, 2, 3, 4 21.02 97.2 −625.59  ±  0.08 390.26  ±  0.08 −12.4  ±  5.4 −6.4  ±  5.5
4 1, 2, 3, 4 20.30 100.9 −16.62  ±  0.07 −5.71  ±  0.08 6.4  ±  5.5 −36.0  ±  5.7
5 1, 2, 3, 4 12.75 95.2 −514.10  ±  0.08 280.57  ±  0.08 −24.9  ±  5.6 −29.1  ±  5.7
6 1 11.49 97.8 759.52  ±  0.07 211.05  ±  0.08 ... ...
7 1, 2, 3 8.99 94.8 123.56  ±  0.08 476.60  ±  0.08 36.5  ±  9.1 1.9  ±  9.5
8 1, 2, 3, 4 6.71 100.1 827.44  ±  0.07 1418.08  ±  0.08 16.0  ±  5.5 0.1  ±  5.6
9 1, 2, 3, 4 6.45 93.6 −514.71  ±  0.08 247.81  ±  0.08 −21.8  ±  5.6 −7.2  ±  5.7
10 1, 2, 3, 4 6.41 97.0 772.36  ±  0.08 245.23  ±  0.08 −2.1  ±  5.5 26.3  ±  5.7
11 1, 2, 3, 4 6.37 99.5 15.45  ±  0.08 14.27  ±  0.08 −3.1  ±  5.5 −18.6  ±  5.6
12 1, 2, 3, 4 5.83 102.1 860.39  ±  0.08 1371.82  ±  0.08 3.7  ±  5.5 19.4  ±  5.6
13 1, 2, 3, 4 5.51 98.3 −2.99  ±  0.07 0.20  ±  0.08 65.6  ±  5.5 −21.4  ±  5.8
14 1, 2, 3, 4 4.95 96.0 −513.87  ±  0.07 282.77  ±  0.08 −20.5  ±  5.4 −12.4  ±  5.5
15 3 4.71 96.0 −12.21  ±  0.07 −3.91  ±  0.08 ... ...
16 1, 3 4.67 97.5 761.64  ±  0.07 213.02  ±  0.08 ... ...
17 1, 2, 3, 4 4.66 100.6 596.73  ±  0.08 1444.51  ±  0.08 −4.1  ±  5.7 15.0  ±  5.9
18 1, 2, 3, 4 4.28 99.8 823.47  ±  0.07 1424.87  ±  0.08 5.6  ±  5.5 −0.7  ±  5.6
19 3 4.27 87.4 106.77  ±  0.07 458.18  ±  0.08 ... ...
20 1, 2, 3, 4 4.20 113.2 −106.13  ±  0.08 432.19  ±  0.08 28.9  ±  5.8 −60.0  ±  6.0
21 1, 2, 3, 4 4.19 98.5 10.63  ±  0.08 5.19  ±  0.08 40.5  ±  5.5 −28.3  ±  5.7
22 1, 2, 3, 4 3.89 97.2 771.83  ±  0.07 239.24  ±  0.08 1.3  ±  5.4 26.6  ±  5.7
23 1, 2, 3, 4 3.77 99.3 884.14  ±  0.07 1345.64  ±  0.08 14.7  ±  5.5 18.7  ±  5.6
24 1, 2, 3, 4 3.72 97.6 771.01  ±  0.08 234.36  ±  0.08 −2.5  ±  5.5 23.6  ±  5.7
25 1, 2, 3 3.13 118.4 41.31  ±  0.08 1187.73  ±  0.08 −9.7  ±  9.0 82.7  ±  9.2
26 1, 2, 3, 4 3.12 99.3 881.46  ±  0.08 1326.57  ±  0.08 10.0  ±  5.5 11.5  ±  5.8
27 3 2.43 93.1 −12.38  ±  0.07 −3.67  ±  0.08 ... ...
28 1, 2, 3, 4 2.30 100.2 207.47  ±  0.08 1228.88  ±  0.08 10.3  ±  5.5 −4.4  ±  5.8
29 2, 3, 4 2.28 97.2 770.52  ±  0.08 232.86  ±  0.08 15.8  ±  8.4 66.7  ±  9.2
30 1, 2, 3, 4 2.28 89.5 111.09  ±  0.08 461.95  ±  0.08 32.9  ±  5.6 −50.2  ±  5.8
31 2 1.89 99.5 −11.96  ±  0.08 −3.17  ±  0.08 ... ...
32 1, 2, 3, 4 1.81 107.8 −401.49  ±  0.08 87.41  ±  0.08 3.8  ±  6.5 −79.9  ±  7.1
33 1, 2, 3, 4 1.74 100.7 207.63  ±  0.08 1235.46  ±  0.08 20.8  ±  5.6 10.6  ±  5.9
34 1, 2, 3, 4 1.67 101.2 −54.19  ±  0.08 1052.12  ±  0.08 −17.0  ±  5.4 26.9  ±  5.7
35 2, 3, 4 1.62 114.4 35.79  ±  0.09 1184.51  ±  0.11 −46.6  ±  10.2 80.2  ±  11.3
36 4 1.55 87.3 107.96  ±  0.07 458.62  ±  0.07 ... ...
37 1, 2, 3, 4 1.53 95.8 −128.10  ±  0.08 203.66  ±  0.08 −24.2  ±  5.6 −4.2  ±  5.8
38 1 1.46 95.9 −12.34  ±  0.08 −3.66  ±  0.08 ... ...
39 1 1.46 98.4 0.74  ±  0.07 −0.23  ±  0.08 ... ...
40 1 1.43 98.7 −11.99  ±  0.08 −3.22  ±  0.08 ... ...
41 2, 3, 4 1.42 118.5 24.08  ±  0.08 1048.78  ±  0.08 −12.1  ±  8.7 45.0  ±  8.9
42 2 1.40 96.7 −12.26  ±  0.08 −3.80  ±  0.08 ... ...
43 1, 2, 3 1.36 96.9 148.53  ±  0.07 1412.51  ±  0.08 8.8  ±  10.4 1.1  ±  11.7
44 1, 2, 3, 4 1.31 99.6 −53.87  ±  0.08 1057.11  ±  0.08 −16.3  ±  5.7 16.6  ±  6.1
45 4 1.30 96.3 −12.19  ±  0.08 −4.02  ±  0.08 ... ...
46 1, 2, 3, 4 1.29 94.1 −8.91  ±  0.08 1202.27  ±  0.08 −7.6  ±  5.6 11.5  ±  5.8
47 1, 2, 3, 4 1.21 99.3 970.34  ±  0.07 1068.50  ±  0.08 8.4  ±  6.1 29.7  ±  6.7
48 1, 2, 3, 4 1.19 95.1 −514.60  ±  0.08 275.71  ±  0.08 −33.8  ±  5.5 −56.3  ±  5.8
49 1 0.99 96.6 15.87  ±  0.08 8.46  ±  0.08 ... ...
50 1, 2, 3, 4 0.92 95.2 135.06  ±  0.08 516.27  ±  0.08 36.6  ±  5.7 4.6  ±  6.2
51 4 0.77 94.9 970.81  ±  0.07 1069.10  ±  0.08 ... ...
52 3 0.75 94.9 −514.38  ±  0.08 277.10  ±  0.08 ... ...
53 1, 2, 3, 4 0.70 101.8 10.05  ±  0.08 1206.54  ±  0.08 −30.2  ±  5.9 20.6  ±  6.4
54 1, 2, 3, 4 0.70 96.7 103.78  ±  0.08 472.25  ±  0.08 44.6  ±  5.9 14.6  ±  6.1
55 1, 2, 3, 4 0.70 101.4 615.77  ±  0.08 1450.81  ±  0.08 −8.6  ±  5.7 17.2  ±  6.0
56 1, 2, 3, 4 0.69 87.3 110.86  ±  0.08 461.48  ±  0.09 43.9  ±  5.8 −24.6  ±  6.5
57 4 0.65 99.7 −17.09  ±  0.08 −7.96  ±  0.08 ... ...
58 1, 2, 3, 4 0.63 96.9 159.05  ±  0.08 1395.47  ±  0.09 2.5  ±  6.1 62.3  ±  6.7
59 4 0.61 92.5 −12.36  ±  0.08 −3.79  ±  0.08 ... ...
60 1, 2, 3, 4 0.59 96.6 82.75  ±  0.08 463.46  ±  0.09 −3.7  ±  6.1 −9.3  ±  6.7
61 1 0.56 101.1 −405.27  ±  0.08 89.91  ±  0.08 ... ...
62 2, 3, 4 0.55 103.5 −406.59  ±  0.08 90.46  ±  0.09 −90.0  ±  9.1 −75.7  ±  9.7
63 1, 2, 3, 4 0.54 99.6 878.77  ±  0.08 1316.82  ±  0.08 2.9  ±  6.2 5.7  ±  7.4
64 4 0.54 98.8 200.87  ±  0.08 1309.50  ±  0.08 ... ...
65 1, 2, 3, 4 0.52 103.6 −41.44  ±  0.08 1125.30  ±  0.08 −21.4  ±  5.8 15.6  ±  6.2
66 3 0.51 98.8 200.78  ±  0.08 1309.34  ±  0.08 ... ...
67 2 0.50 99.9 −404.50  ±  0.09 89.78  ±  0.09 ... ...
68 4 0.46 99.3 15.55  ±  0.08 8.47  ±  0.08 ... ...
69 4 0.43 98.5 202.48  ±  0.08 1300.13  ±  0.09 ... ...
70 1, 2, 3, 4 0.42 94.7 103.76  ±  0.08 1349.41  ±  0.09 −19.2  ±  5.9 19.6  ±  6.6
71 1, 2 0.42 100.5 590.55  ±  0.08 1446.26  ±  0.09 ... ...
72 1, 2, 3, 4 0.41 101.4 591.27  ±  0.08 1438.58  ±  0.08 −19.0  ±  5.8 20.6  ±  6.2
73 4 0.41 99.3 883.47  ±  0.08 1332.41  ±  0.09 ... ...
74 4 0.41 95.0 124.38  ±  0.08 477.45  ±  0.08 ... ...
75 1 0.41 127.7 −108.53  ±  0.08 430.49  ±  0.08 ... ...
76 1, 2 0.41 100.3 12.37  ±  0.08 14.79  ±  0.09 ... ...
77 1 0.41 95.7 62.90  ±  0.08 1271.66  ±  0.08 ... ...
78 1, 2, 3, 4 0.40 101.8 242.22  ±  0.08 1240.44  ±  0.10 12.8  ±  6.2 18.9  ±  7.3
79 1, 2, 3 0.39 99.6 881.68  ±  0.08 1354.22  ±  0.09 1.5  ±  11.6 14.7  ±  15.5
80 1, 2, 3, 4 0.37 102.3 623.19  ±  0.08 1447.14  ±  0.08 −7.7  ±  6.1 13.7  ±  6.5
81 1 0.37 99.9 871.98  ±  0.08 1307.43  ±  0.10 ... ...
82 4 0.36 93.0 124.00  ±  0.08 476.56  ±  0.09 ... ...
83 1, 2, 4 0.36 100.7 83.42  ±  0.08 274.56  ±  0.10 15.4  ±  6.8 −11.1  ±  8.1
84 2, 4 0.35 100.5 822.73  ±  0.08 1426.15  ±  0.10 ... ...
85 1, 2, 3, 4 0.34 96.7 −623.32  ±  0.08 376.77  ±  0.09 −13.0  ±  6.6 0.0  ±  7.5
86 4 0.34 99.5 204.01  ±  0.08 1268.80  ±  0.09 ... ...
87 1 0.34 101.4 −12.45  ±  0.08 −3.26  ±  0.08 ... ...
88 4 0.33 100.0 29.61  ±  0.09 12.33  ±  0.10 ... ...
89 4 0.33 99.7 203.21  ±  0.09 1285.90  ±  0.11 ... ...
90 4 0.33 98.6 8.88  ±  0.08 4.77  ±  0.09 ... ...
91 1, 2, 3, 4 0.32 104.9 193.07  ±  0.08 782.37  ±  0.09 11.7  ±  6.0 −4.4  ±  6.7
92 2, 3, 4 0.31 95.0 −516.60  ±  0.09 256.92  ±  0.09 −12.9  ±  9.6 −12.7  ±  10.4
93 3 0.31 94.6 970.64  ±  0.08 1068.73  ±  0.08 ... ...
94 1, 2, 3 0.31 102.3 859.58  ±  0.08 1412.65  ±  0.09 −28.7  ±  10.4 51.8  ±  12.4
95 4 0.31 99.1 −85.10  ±  0.08 96.72  ±  0.09 ... ...
96 1, 2, 3 0.30 123.6 −91.29  ±  0.08 448.82  ±  0.08 −2.5  ±  10.2 −39.5  ±  11.2
97 1, 2, 3, 4 0.30 95.7 −516.55  ±  0.08 265.90  ±  0.08 −23.0  ±  5.9 3.6  ±  7.0
98 3 0.30 99.3 15.38  ±  0.09 8.48  ±  0.09 ... ...
99 2, 3, 4 0.29 95.1 −616.35  ±  0.08 433.17  ±  0.09 −12.4  ±  9.3 −9.3  ±  10.3
100 1, 2, 3 0.28 95.8 47.97  ±  0.08 194.52  ±  0.08 14.8  ±  10.1 −21.2  ±  11.2
101 3 0.28 96.5 970.57  ±  0.08 1068.80  ±  0.09 ... ...
102 4 0.27 90.6 124.52  ±  0.08 477.19  ±  0.09 ... ...
103a 1, 2, 3 0.27 86.4 106.46  ±  0.08 458.25  ±  0.09 ... ...
104 4 0.27 99.3 −90.01  ±  0.08 142.78  ±  0.10 ... ...
105 4 0.26 98.6 871.68  ±  0.09 1282.10  ±  0.10 ... ...
106 1, 3, 4 0.25 101.5 10.67  ±  0.08 1208.55  ±  0.09 −32.1  ±  6.3 3.6  ±  7.4
107 3 0.24 99.5 203.91  ±  0.09 1268.48  ±  0.10 ... ...
108 2 0.24 100.1 −84.72  ±  0.10 97.24  ±  0.12 ... ...
109 2, 3 0.24 95.7 53.11  ±  0.09 1291.76  ±  0.10 ... ...
110 1, 2, 3, 4 0.24 96.4 92.11  ±  0.08 467.69  ±  0.09 8.3  ±  6.3 −10.3  ±  7.2
111 1, 2 0.23 102.4 −94.09  ±  0.08 164.25  ±  0.08 ... ...
112a 1, 2, 3 0.22 87.4 41.52  ±  0.08 525.37  ±  0.09 ... ...
113 2 0.22 100.5 596.04  ±  0.10 1485.14  ±  0.14 ... ...
114 4 0.21 115.7 47.16  ±  0.08 1065.65  ±  0.09 ... ...
115 2 0.21 99.3 11.83  ±  0.11 106.83  ±  0.10 ... ...
116 1 0.20 101.7 96.99  ±  0.08 1384.97  ±  0.09 ... ...
117 2, 3 0.20 95.1 135.26  ±  0.09 558.19  ±  0.09 ... ...
118 4 0.20 95.9 123.38  ±  0.08 475.38  ±  0.09 ... ...
119 3, 4 0.19 95.7 121.26  ±  0.08 475.30  ±  0.09 ... ...
120 2, 3, 4 0.19 95.7 51.23  ±  0.08 1291.83  ±  0.09 −23.9  ±  10.5 52.2  ±  12.1
121 4 0.18 91.7 110.77  ±  0.08 460.47  ±  0.09 ... ...
122 1, 2, 3, 4 0.18 103.6 −54.77  ±  0.08 1049.45  ±  0.09 −16.3  ±  6.5 14.6  ±  8.1
123 1, 2, 3, 4 0.17 94.3 105.02  ±  0.08 1351.10  ±  0.10 −18.2  ±  6.5 15.0  ±  7.7
124 1, 2 0.17 116.3 18.99  ±  0.08 1162.29  ±  0.09 ... ...
125 2 0.16 101.2 −17.73  ±  0.14 −31.34  ±  0.15 ... ...
126 1 0.16 92.3 120.38  ±  0.08 469.82  ±  0.09 ... ...
127 1 0.16 101.6 −53.24  ±  0.08 1046.79  ±  0.09 ... ...
128 1, 3 0.16 101.7 194.02  ±  0.09 1216.44  ±  0.10 ... ...
129 1 0.15 91.0 −227.30  ±  0.08 646.92  ±  0.10 ... ...
130 3, 4 0.14 91.7 −167.73  ±  0.09 380.68  ±  0.10 ... ...
131 4 0.14 84.2 −507.22  ±  0.08 520.81  ±  0.10 ... ...
132 4 0.14 111.2 20.79  ±  0.08 1155.17  ±  0.09 ... ...
133 2 0.14 106.7 −105.08  ±  0.09 456.25  ±  0.10 ... ...
134 1, 2, 3 0.14 105.0 −407.55  ±  0.08 89.72  ±  0.10 −89.4  ±  11.3 −60.6  ±  13.6
135 1 0.14 88.7 123.51  ±  0.08 487.91  ±  0.10 ... ...
136 1 0.14 94.0 −7.07  ±  0.08 1203.64  ±  0.09 ... ...
137 2 0.14 101.9 −17.06  ±  0.10 −30.70  ±  0.10 ... ...
138 3 0.13 115.0 42.78  ±  0.08 1076.47  ±  0.09 ... ...
139 1, 2 0.13 104.5 −52.94  ±  0.08 1062.76  ±  0.10 ... ...
140 3 0.13 87.3 108.27  ±  0.08 506.54  ±  0.09 ... ...
141 2 0.13 96.5 131.24  ±  0.10 488.19  ±  0.11 ... ...
142 1, 2 0.13 91.7 −92.49  ±  0.08 677.89  ±  0.09 ... ...
143 1, 2, 3, 4 0.13 87.0 −62.91  ±  0.08 279.80  ±  0.10 22.6  ±  8.0 −62.4  ±  9.7
144 1, 2, 3, 4 0.12 104.7 −45.49  ±  0.08 1082.40  ±  0.09 −27.6  ±  7.4 −2.5  ±  9.6
145 2 0.12 118.5 35.40  ±  0.09 1184.50  ±  0.10 ... ...
146 2, 3 0.11 124.0 17.42  ±  0.09 1158.01  ±  0.11 ... ...
147 4 0.11 90.1 103.48  ±  0.09 458.33  ±  0.11 ... ...
148 3, 4 0.11 103.4 33.25  ±  0.10 1245.23  ±  0.11 ... ...
149 2 0.11 93.7 −12.45  ±  0.09 −3.75  ±  0.11 ... ...
150 2 0.11 88.6 106.95  ±  0.09 458.31  ±  0.10 ... ...
151 2 0.11 117.4 50.55  ±  0.10 1190.01  ±  0.10 ... ...
152 1 0.11 96.3 −0.54  ±  0.09 1199.17  ±  0.10 ... ...
153 1 0.10 106.4 −95.93  ±  0.08 163.34  ±  0.10 ... ...
154 2 0.10 102.0 −53.00  ±  0.10 1046.06  ±  0.13 ... ...
155 1, 2, 3, 4 0.10 104.3 30.90  ±  0.08 1237.90  ±  0.09 −14.9  ±  7.6 16.7  ±  9.2
156 1, 2, 3 0.10 92.1 −93.50  ±  0.09 174.90  ±  0.12 −23.3  ±  12.0 −7.4  ±  15.1
157 1, 2 0.09 93.7 −109.34  ±  0.08 170.88  ±  0.10 ... ...
158 2 0.09 102.6 119.90  ±  0.10 475.82  ±  0.11 ... ...
159 4 0.09 115.4 22.03  ±  0.10 1155.46  ±  0.12 ... ...
160 1 0.09 103.5 597.29  ±  0.09 987.29  ±  0.11 ... ...
161 1, 2 0.09 104.8 −56.70  ±  0.09 1041.70  ±  0.12 ... ...
162 1, 2 0.09 92.7 167.30  ±  0.08 1841.14  ±  0.10 ... ...
163 2, 4 0.09 87.9 106.06  ±  0.10 457.91  ±  0.11 ... ...
164 2 0.08 92.3 104.04  ±  0.11 458.34  ±  0.12 ... ...
165 1 0.08 112.0 −106.06  ±  0.08 409.95  ±  0.11 ... ...
166 1, 2 0.08 91.6 151.34  ±  0.08 1831.39  ±  0.11 ... ...
167 3 0.07 102.9 25.19  ±  0.12 1241.43  ±  0.12 ... ...
168 1 0.07 92.9 −90.08  ±  0.09 678.15  ±  0.11 ... ...
169 1 0.06 113.2 −0.62  ±  0.09 1063.01  ±  0.11 ... ...
170 1 0.06 93.4 139.41  ±  0.09 518.74  ±  0.11 ... ...
171 1 0.05 111.8 −106.28  ±  0.11 390.79  ±  0.13 ... ...
172 1 0.05 88.7 103.29  ±  0.11 458.90  ±  0.12 ... ...
173 2 0.05 113.8 3.78  ±  0.12 1128.38  ±  0.15 ... ...

Notes. Column 1 gives the feature label number; Col. 2 lists the observing epochs at which the feature was detected; Cols. 3 and 4 provide the intensity of the strongest spot and the intensity-weighted LSR velocity, respectively, averaged over the observing epochs; Cols. 5 and 6 give the position offsets (with the associated errors) along the RA and Dec axes, relative to the feature #1, measured at the first epoch of detection; Cols. 7 and 8 give the components of the relative proper motion (with the associated errors) along the RA and Dec axes, measured with respect to the reference feature #0 (the “center of motion”).

(a)

Feature with not reliable proper motion, even if observed at three epochs.

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