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Home All issues Volume 648 (April 2021) A&A, 648 (2021) A125 Full HTML
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Table A.1

Preferred directions of VLBI astrometric position variations for the 79 sources of the sample where such variations occur along aunique direction.

B1950 name Nvec Θ (°) σΘ (°) Significance Reliability
1 0008−264 2 172 18 0.92 –
2 0016+731 11 106 16 0.61 –
121 4 0.30 0.87
3 0059+581 37 19 44 0.85 x
107 6 0.15 –
4 0106+013 21 67 50 0.71 x
27 4 0.29 –
5 0119+115 21 168 28 0.75 –
169 3 0.21 0.04
6 0131−522 3 118 19 0.95 –
7 0201+113 10 169 16 0.94 –
8 0202+149 14 162 40 0.77 x
160 3 0.24 –
9 0212+735 18 168 80 0.81 x
42 4 0.19 –
10 0307+380 3 164 27 1.05 –
11 0316+413 2 3 3 0.90 –
12 0322+222 7 85 26 0.94 –
13 0345+460 2 71 22 0.97 –
14 0402−362 8 80 49 0.51 x
180 12 0.49 –
15 0405−385 3 15 4 0.56 –
10 28 0.46 0.19
16 0434−188 2 3 18 0.91 –
17 0454+844 3 47 19 0.99 –
18 0529+483 6 13 17 1.01 –
19 0530−727 2 140 17 0.69 –
67 36 0.31 x
20 0544+273 2 122 19 1.00 –
21 0556+238 10 1 46 0.65 x
18 7 0.35 –
22 0606−223 3 40 12 0.95 –
23 0656+082 12 167 48 0.63 x
159 8 0.37 –
24 0735+178 6 63 19 0.92 –
25 0742+103 4 130 22 0.95 –
26 0814+425 3 86 19 0.95 –
27 0823+033 22 23 25 0.93 –
28 0821+394 2 179 21 1.00 –
29 0919−260 4 75 7 0.92 –
30 0920+390 2 155 30 0.97 –
31 0954+658 4 156 48 0.53 x
16 9 0.47 –
32 0955+476 36 91 43 0.78 x
85 4 0.23 –
33 1004+141 3 126 45 0.59 x
111 11 0.41 –
34 1044+719 16 141 24 0.91 –
35 1053+704 3 36 12 0.94 –
36 1104−445 7 117 55 0.68 x
106 8 0.32 –
37 1133−032 2 10 26 0.99 –
38 1144+402 6 138 19 0.95 –
39 1156+295 21 11 41 0.89 x
33 5 0.09 –
40 1219+044 19 6 28 0.95 –
41 1243−072 2 3 16 0.76 –
142 38 0.24 x
42 1255−316 10 38 27 0.94 –
43 1324+224 7 146 13 0.61 –
62 33 0.39 x
44 1342+662 2 42 6 0.95 –
45 1404+286 24 143 64 0.59 x
12 10 0.41 –
46 1418+546 13 173 57 0.66 x
94 8 0.34 –
47 1451−375 2 13 9 0.99 –
48 1502+106 8 139 38 0.52 x
162 10 0.47 –
49 1510−089 5 157 14 0.62 –
88 32 0.37 x
50 1520+319 3 46 19 0.62 –
151 53 0.39 x
51 1548+056 4 173 6 0.92 –
52 1610−771 4 135 23 1.07 –
53 1611+343 27 4 56 0.76 x
176 5 0.24 –
54 1617+229 4 19 44 0.59 x
160 8 0.41 –
55 1633+38 8 127 39 0.63 x
102 11 0.37 –
56 1657−261 7 133 23 0.90 –
57 1705+018 3 6 17 1.05 –
58 1745+624 10 141 33 0.53 x
40 11 0.45 –
59 1751+288 5 34 25 0.92 –
60 1758−651 3 49 23 0.92 –
61 1806+456 3 173 7 0.73 –
172 37 0.27 x
62 1815−553 2 86 8 0.91 –
63 1823+568 2 9 12 0.76 –
63 45 0.24 x
64 1846+322 8 141 2 0.68 –
81 45 0.32 x
65 1908−201 13 167 55 0.55 x
12 10 0.45 –
66 1909+161 2 175 11 0.98 –
67 1936−155 2 112 12 0.70 –
69 39 0.30 x
68 2000+472 4 95 2 0.60 –
94 15 0.38 0.01
69 2007+777 3 78 4 0.72 –
93 26 0.28 0.59
70 2037+511 26 48 10 0.42 –
38 1 0.30 0.89
9 35 0.29 x
71 2113+293 15 20 36 0.57 x
164 7 0.43 –
72 2200+420 13 63 35 0.88 x
10 3 0.12 –
73 2214+350 6 177 22 0.99 –
74 2223−052 18 148 42 0.78 x
95 7 0.22 –
75 2230+114 3 174 34 0.56 x
30 9 0.43 –
76 2309+454 4 154 12 0.97 –
77 2318+049 12 135 24 0.91 –
78 2355−106 7 5 57 0.61 x
70 10 0.39 –
79 2356+385 14 159 34 0.69 x
170 6 0.28 –

Notes. Column 1 indicates the source name (using the IERS denomination). Column 2 is the number of vectors comprised in the reduced coordinates time series (see Sect. 3). Columns 3 and 4 give the direction Θ and its uncertainty σΘ, as derived from the least-squares fitting process, while Column 5 indicates the significance of the direction (see Sect. 3). This material is repeated for every subsequent direction, as extracted by our procedure. Column 6 is concerned with the reliability of these directions. For each source, the primary direction is identified with the symbol “–” in this column, after which any further direction extracted for that source – if reliable (i.e. with σΘ < 30°) – shows a number. Unreliable directions (i.e. with σΘ > 30°) are marked with the symbol “x”. The number in Col. 6 indicates the lowest normalized difference of the considered direction with respect to any of the preceding reliable directions (see details in Sect. 4.2). The higher this value, the lower the probability that the considered direction is a duplicate of a preceding one. All directions associated with a value in this column that is less than 1 are assumed to be duplicates of another preferred direction already listed for the corresponding source.

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