2009A&A...493..317L


Query : 2009A&A...493..317L

2009A&A...493..317L - Astronomy and Astrophysics, volume 493, 317-323 (2009/1-1)

On radio source selection to define a stable celestial frame.

LAMBERT S.B. and GONTIER A.-M.

Abstract (from CDS):

The most accurate realization of a quasi inertial reference frame, the International Celestial Reference Frame (ICRF), is made of 212 defining extragalactic radio sources whose coordinates are determined using VLBI observations. Recent studies demonstrated however that using other sets of sources could improve the frame stability. This study examines a simple radio source selection scheme to define celestial reference frame axes more stable than the ones as currently defined by the ICRF. After having derived source coordinate time series from 26 years of VLBI observations, we select the most suitable sources on the basis of their positional variability (rms and slope), and observational history. We determine the axis stability of the frame defined by the selection, as well as its suitability for global geodetic VLBI analyses, i.e., determination of Earth orientation parameters and source and station coordinates. We select four frames made of 196, 200, 262, and 269 sources, respectively, showing a satisfactory sky coverage in both hemispheres. Our selections provide a frame stability improved by up to 40% with respect to the ICRF, and by 20% with respect to the frame as defined by the 247 stable sources of Feissel-Vernier et al. (2006A&A...452.1107F). Reanalysis of data with respect to this frame gives astrometric catalogues aligned to the ICRF-Ext.2 within 17µas. Effects on the Earth orientation parameter estimates and terrestrial reference frame determination remain marginal. In view of the generation of the next ICRF, we recommend that such an algorithm be taken into consideration along with other criteria based on individual characteristics of the radio sources.

Abstract Copyright:

Journal keyword(s): reference systems - Earth

VizieR on-line data: <Available at CDS (J/A+A/493/317): list196.dat list200.dat list262.dat list269.dat>

Simbad objects: 267

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Number of rows : 267
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 QSO B0003+380 QSO 00 05 57.1767212568 +38 20 15.136647468   19.4 18.10 17.16   ~ 123 1
2 QSO B0003-066 BLL 00 06 13.8928497048 -06 23 35.332689228   19.1   17.14   ~ 301 1
3 QSO B0008-264 BLL 00 11 01.2468878208 -26 12 33.375807360   19.53   19.64   ~ 76 0
4 ICRF J001331.1+405137 Sy1 00 13 31.1303050776 +40 51 37.148133240   17.9 17.9     ~ 107 1
5 QSO B0013-005 QSO 00 16 11.0883756936 -00 15 12.439394280   20.44 19.98 19.72   ~ 134 1
6 6C 001403+811827 BLL 00 17 08.4752241816 +81 35 08.137070016   17.60 16.52 15.95   ~ 373 1
7 QSO B0016+73 QSO 00 19 45.7863851568 +73 27 30.018073212     19.0 18.26   ~ 284 1
8 7C 0059+5808 QSO 01 02 45.7622788272 +58 24 11.137682016   20.09 19.22 18.57 17.90 ~ 208 1
9 QSO B0104-408 QSO 01 06 45.1074148680 -40 34 19.954747560   18.60 19.0 19.25   ~ 126 0
10 4C 01.02 QSO 01 08 38.7711625632 +01 35 00.318640596   18.54 18.39 19.05   ~ 500 1
11 QSO B0111+021 BLL 01 13 43.1448058008 +02 22 17.310074664   16.4 16.0 11.22   ~ 125 1
12 QSO B0119+115 QSO 01 21 41.5943568672 +11 49 50.417513652   19.5 19.0 18.61   ~ 173 1
13 QSO B0119+041 QSO 01 21 56.8612353744 +04 22 24.734216064   19.2 19.5 19.40   ~ 176 1
14 QSO B0130-17 QSO 01 32 43.4876969712 -16 54 48.522844980   18.75 18.44 15.44   ~ 201 1
15 ICRF J013305.7-520003 Sy1 01 33 05.7626793624 -52 00 03.947006160   18.68 20.3 18.63   ~ 95 0
16 QSO B0133+476 Bla 01 36 58.5947351640 +47 51 29.099491848     18.0 19.25 15.21 ~ 469 1
17 ICRF J013738.3-243053 Sy1 01 37 38.3462810880 -24 30 53.883832500   17.47 17.33 16.57   ~ 186 1
18 QSO B0146+056 QSO 01 49 22.37089 +05 55 53.5687   20.7 19.0 20.30   ~ 120 1
19 QSO B0201+113 QSO 02 03 46.6570697736 +11 34 45.410523492   19.5 19.5 19.41   ~ 193 1
20 7C 020209.69+315812.00 QSO 02 05 04.9251427344 +32 12 30.093761736     18.00 17.40   ~ 209 1
21 QSO B0208-512 BLL 02 10 46.2004407600 -51 01 01.893013392   17.10 16.93 14.82   ~ 412 1
22 QSO J0217+0144 QSO 02 17 48.9544520496 +01 44 49.693296336   16.74 16.09 18.51 13.29 ~ 397 1
23 4C 06.11 QSO 02 24 28.4278532496 +06 59 23.340565248   20.8 20.0 17.78   ~ 152 1
24 4C 13.14 QSO 02 31 45.8939171256 +13 22 54.713964000   17.96 17.71 17.93   ~ 263 1
25 4C 28.07 QSO 02 37 52.4057664048 +28 48 08.990026884     18.5 16.99   ~ 559 1
26 NGC 1052 GiP 02 41 04.7997864552 -08 15 20.761481016 11.84 11.41 10.47 10.71   ~ 1241 2
27 QSO B0239+108 QSO 02 42 29.1721913352 +11 01 00.754183596   20.0   19.66   ~ 109 1
28 QSO B0256+075 QSO 02 59 27.0767562768 +07 47 39.646138560   18 18 16.9   ~ 169 1
29 4C 47.08 BLL 03 03 35.2422414360 +47 16 16.276532592   17.54 16.95 16.2   ~ 254 1
30 QSO B0302-623 QSO 03 03 50.6312320032 -62 11 25.549538568   19.48   17.87   ~ 129 1
31 NGC 1218 Sy1 03 08 26.2245464640 +04 06 39.305753460   12.84       ~ 365 1
32 QSO B0306+101 QSO 03 09 03.6232590528 +10 29 16.338746292   18.45   19.91   ~ 172 1
33 QSO B0308-611 QSO 03 09 56.0985822360 -60 58 39.060338484   19.00 18.5 18.18   ~ 119 1
34 ICRF J031951.2+190131 QSO 03 19 51.2567979192 +19 01 31.296300312   19   17.76   ~ 45 1
35 QSO B0319+12 QSO 03 21 53.1035459112 +12 21 13.957799436   19 19     ~ 125 1
36 4C 32.14 QSO 03 36 30.1074972672 +32 18 29.341371132     17.50 16.6   ~ 612 1
37 QSO B0336-0156 QSO 03 39 30.9376270008 -01 46 35.803797420   18.96 18.41 17.33   ~ 527 1
38 ICRF J034506.4+145349 QSO 03 45 06.4160415072 +14 53 49.561389312       20.00   ~ 44 1
39 QSO B0400-319 QSO 04 02 21.2651532264 -31 47 25.953603252   20.2   20.75   ~ 86 1
40 QSO B0400+258 QSO 04 03 05.5865860680 +26 00 01.503644112     18 19.00   ~ 189 1
41 QSO J0403-3605 QSO 04 03 53.7498574512 -36 05 01.915228284   17.04 17.17 16.67   ~ 254 1
42 PKS 0405-123 Sy1 04 07 48.4309841856 -12 11 36.659928408   15.09 14.86 14.7   ~ 487 1
43 QSO B0406+121 BLL 04 09 22.0088301624 +12 17 39.857554068   20.5   18.27   ~ 102 1
44 QSO B0414-189 QSO 04 16 36.5445395016 -18 51 08.337131568   18.89 18.0 18.51   ~ 155 1
45 QSO B0420-0127 QSO 04 23 15.8007747432 -01 20 33.063518580   17.50 17.00 16.28   ~ 1138 3
46 QSO B0422-380 QSO 04 24 42.2441265240 -37 56 20.783748012   17.96 18.08 18.03   ~ 95 1
47 QSO B0422+004 BLL 04 24 46.8421990080 +00 36 06.329375028 16.15 15.94 16.98     ~ 340 1
48 QSO J0429+2724 BLL 04 29 52.9606781472 +27 24 37.877952600   18.6       ~ 33 0
49 Mrk 1506 Sy1 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 1935 2
50 QSO B0430+2859 BLL 04 33 37.8274881336 +29 05 55.466863440   19.0 17.80 17.06   ~ 139 1
51 QSO B0434-188 QSO 04 37 01.4827920216 -18 44 48.612142824   19.11 19.0 19.62   ~ 101 1
52 QSO B0437-454 QSO 04 39 00.8555046576 -45 22 22.556837604   20.44 20.6 19.48   ~ 85 0
53 ICRF J044331.6+344106 Bz? 04 43 31.63520255 +34 41 06.6640222           ~ 33 1
54 QSO J0457-2324 QSO 04 57 03.1791422424 -23 24 52.021129572   18.85 18.5 16.56   ~ 364 1
55 QSO J0459+0229 QSO 04 59 52.0509623496 +02 29 31.175071512   18.2 19     ~ 158 1
56 QSO B0502+049 QSO 05 05 23.1847589376 +04 59 42.724314276   18.7 19.0 17.58   ~ 137 1
57 QSO B0506-612 QSO 05 06 43.9885306656 -61 09 40.994092836   17.16 16.85 16.9   ~ 173 2
58 QSO B0454+844 BLL 05 08 42.3628147248 +84 32 04.544402964     16.5 18.95   ~ 235 1
59 QSO B0507+179 QSO 05 10 02.3689932504 +18 00 41.582562768   20.0 19.0 19.09   ~ 380 1
60 QSO B0516-621 BLL 05 16 44.9266207320 -62 07 05.388274992 18.50 18.09 17.85 17.46   ~ 107 1
61 QSO B0521-365 BLL 05 22 57.9841341216 -36 27 30.847204512   15.26 14.62 14.48   ~ 782 2
62 QSO J0530+13 Bla 05 30 56.4168902136 +13 31 55.151893344     20.0 19.35   ~ 916 1
63 QSO B0537-441 BLL 05 38 50.3617339512 -44 05 08.940591924   15.77 16.48 16   ~ 840 2
64 ICRF J053942.3+143345 QSO 05 39 42.3658223832 +14 33 45.563036076           ~ 68 1
65 QSO B0537-286 QSO 05 39 54.2815136376 -28 39 55.947762216   19.70 20.0 18.789   ~ 264 1
66 QSO B0539-057 QSO 05 41 38.0825893728 -05 41 49.441027200     20.4 20.70   ~ 230 2
67 NVSS J054734+272157 Rad 05 47 34.14892109 +27 21 56.8425667           ~ 37 1
68 6C 060237+672110 QSO 06 07 52.6703026608 +67 20 55.412148084   20.6 20.6 20.21   ~ 91 1
69 QSO B0607-157 QSO 06 09 40.9493089944 -15 42 40.667570496   18.47 18.0 19.90   ~ 299 1
70 QSO J0635-7516 QSO 06 35 46.5079301472 -75 16 16.816418256   15.96 15.75 15.82   ~ 549 1
71 ICRF J063920.9-334600 BLL 06 39 20.90464 -33 46 00.1134     20.50 20.30   ~ 33 1
72 QSO B0636+68 BLL 06 42 04.2572705040 +67 58 35.620484340     16.46 16.01   ~ 215 1
73 7C 064253.00+445430.00 QSO 06 46 32.0253442416 +44 51 16.588600488   19.57 18.49 18.64   ~ 335 1
74 QSO J0650-1637 QSO 06 50 24.6105052464 -16 37 40.029930768   22.09       ~ 101 1
75 ICRF J065917.9+081330 QSO 06 59 17.9961850968 +08 13 30.951760044           ~ 29 1
76 ICRF J070001.5+170921 QSO 07 00 01.5255517320 +17 09 21.701659860   21.0       ~ 63 1
77 4C 47.23 BLL 07 10 46.1050700112 +47 32 11.135340924   18.2 18.2 13.9   ~ 133 1
78 8C 0716+714 BLL 07 21 53.4482942664 +71 20 36.363846516   15.5 14.17 14.27   ~ 1223 1
79 4C 14.23 BLL 07 25 16.8076357680 +14 25 13.745327232       17.48   ~ 121 1
80 QSO B0723-007 BLL 07 25 50.6400080064 -00 54 56.546276580   17.39 16.57 15.82   ~ 238 1
81 ICRF J072611.7+791131 Bz? 07 26 11.73524096 +79 11 31.0162085       23.08   ~ 48 0
82 QSO J0738+1742 BLL 07 38 07.3935719136 +17 42 18.998218764   16.76 16.22 15.78   ~ 946 1
83 QSO B0738-674 QSO 07 38 56.4969806640 -67 35 50.825464296     19.8 20.00   ~ 49 1
84 QSO B0736+01 QSO 07 39 18.0339358560 +01 37 04.618841340   16.90 16.47 16.19   ~ 652 1
85 QSO B0742+103 QSO 07 45 33.05952141 +10 11 12.6923363       23.72   ~ 186 1
86 [VV2006] J074625.9+254901 QSO 07 46 25.8741807840 +25 49 02.131248396   19.94 19.69 19.2   ~ 140 2
87 QSO B0745+241 QSO 07 48 36.1087026816 +24 00 24.109630416   19.70 18.89 17.88   ~ 192 1
88 QSO B0748+126 QSO 07 50 52.0455280992 +12 31 04.828034820   17.67 17.28 17.16   ~ 303 1
89 4C 54.15 BLL 07 53 01.3847860272 +53 52 59.640135276   18.5   16.77   ~ 138 1
90 QSO B0754+10 BLL 07 57 06.6427726320 +09 56 34.848603888   15.43 15.00 15.99   ~ 420 1
91 7C 080458.39+495918.00 QSO 08 08 39.6660148632 +49 50 36.535256700   19.55 19.18 18.34   ~ 340 2
92 7C 080533.60+410130.00 QSO 08 08 56.6518448520 +40 52 44.892508944   19.87 19.41 16.61   ~ 109 1
93 QSO B0818-128 BLL 08 20 57.4483468704 -12 58 59.176280532   15.30 15.00 16.5   ~ 166 1
94 4C 56.16A QSO 08 24 47.2364552880 +55 52 42.665276388   18.52 18.19 17.82   ~ 175 1
95 QSO B0823+033 BLL 08 25 50.3384535600 +03 09 24.523229736   17.81 17.23 16.91   ~ 307 1
96 QSO B0826-373 QSO 08 28 04.78022012 -37 31 06.2809892   16       ~ 49 0
97 7C 082754.29+242103.00 QSO 08 30 52.0861432224 +24 10 59.822369580   17.62 17.26 16.30   ~ 490 1
98 QSO B0829+047 BLL 08 31 48.8770033992 +04 29 39.086842884   17.10 16.4 14.55   ~ 444 2
99 QSO B0839+187 QSO 08 42 05.0940565824 +18 35 40.988568300   16.63 16.36 16.56   ~ 173 2
100 4C 47.29 QSO 09 03 03.9901509360 +46 51 04.140636948   19.90 19.44 18.7   ~ 240 1
101 QSO B0919-260 QSO 09 21 29.3541624192 -26 18 43.387465500   18.46 18.41 18.01   ~ 127 1
102 6C 091739+622838 QSO 09 21 36.2303190408 +62 15 52.181600580   19.76 19.26 18.96   ~ 335 1
103 QSO B0920-397 Bla 09 22 46.4181311352 -39 59 35.069624772   18.12 18.8     ~ 116 1
104 6C 092005+390241 Bz? 09 23 14.45293105 +38 49 39.9101375           ~ 40 1
105 ICRF J092751.8-203451 Sy1 09 27 51.8243005200 -20 34 51.234163716   16.59 16.40 16.00   ~ 148 1
106 QSO B0952+179 QSO 09 54 56.8238081784 +17 43 31.221444756   17.31 17.23     ~ 205 1
107 Ton 469 Sy1 09 58 20.9496221568 +32 24 02.208417372   15.88 15.78 15.51   ~ 411 1
108 6C 095456+654857 BLL 09 58 47.2451872176 +65 33 54.819354600     17.0 15.75   ~ 662 1
109 QSO J1007+1356 QSO 10 07 41.4976798560 +13 56 29.602820184     19.0 18.59   ~ 116 1
110 4C 40.25 QSO 10 23 11.5657641408 +39 48 15.385705020   17.5 17.5 17.18   ~ 139 1
111 4C 19.34 QSO 10 24 44.8094438952 +19 12 20.414847960   17.95 17.49 16.41   ~ 151 1
112 QSO B1030+074 QSO 10 33 34.0241922480 +07 11 26.156490324     20.34 20.22   ~ 102 1
113 QSO B1032-199 QSO 10 35 02.1555499368 -20 11 34.357926264   18.10 19.0 18.53   ~ 107 1
114 QSO B1034-293 QSO 10 37 16.0795246848 -29 34 02.815459680   16.46 16.46 17.54   ~ 303 1
115 4C 06.41 BLL 10 41 17.1625746528 +06 10 16.926043944   16.86 16.70 16.14   ~ 291 1
116 6C 103844+524909 QSO 10 41 46.7816890392 +52 33 28.230749244   16.96 18.5 16.39   ~ 126 1
117 6C 103912+811006 QSO 10 44 23.0623410576 +80 54 39.445392420     16.5 18.29   ~ 192 1
118 ICRF J104806.6-190935 Sy1 10 48 06.6206359848 -19 09 35.731641132   18.59 18.5 17.10   ~ 164 1
119 6C 104451+715930 QSO 10 48 27.6198768456 +71 43 35.939809416     19.0 17.49   ~ 206 1
120 4C 21.28 QSO 10 51 48.7882723152 +21 19 52.315780584     18.5 17.72   ~ 137 1
121 6C 105327+702759 QSO 10 56 53.6177381208 +70 11 45.915360216   18.5 18.5 19.32   ~ 99 1
122 QSO J1058+8114 QSO 10 58 11.5371138576 +81 14 32.674413300   18.5 20.0 18.14   ~ 94 1
123 4C 01.28 BLL 10 58 29.6054370384 +01 33 58.820502924   18.74 18.28 16.68   ~ 721 2
124 QSO B1057-797 BLL 10 58 43.3122762768 -80 03 54.163249236   19.08   17.31   ~ 169 0
125 MRC 1101-536 BLL 11 03 52.2217012464 -53 57 00.702914148   18.30 17.9     ~ 68 1
126 Mrk 421 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2540 1
127 QSO B1111+149 QSO 11 13 58.6949352456 +14 42 26.953715628   17.89 17.57 17.41   ~ 105 1
128 CTD 74 QSO 11 25 53.7115286736 +26 10 19.978084308   18.62 18.51 18.39   ~ 138 1
129 QSO B1124-186 QSO 11 27 04.3922636736 -18 57 17.439607512   19.17   19.23   ~ 203 1
130 QSO J1130-1449 QSO 11 30 07.0523452128 -14 49 27.388021944   17.17 16.90 16 16.97 ~ 666 1
131 QSO B1128+385 QSO 11 30 53.2825598016 +38 15 18.551693556   19.11 18.80 19.42   ~ 187 1
132 [VV2006] J113320.1+004052 QSO 11 33 20.0556783432 +00 40 52.845889656   18.5   18.88   ~ 66 2
133 QSO B1143-245 QSO 11 46 08.1033450360 -24 47 32.900532360   17.97 18.0 17.20   ~ 116 1
134 6C 114419+401458 QSO 11 46 58.2981358992 +39 58 34.306186476   18.80 18.45 18.58   ~ 204 1
135 QSO B1144-3755 BLL 11 47 01.3709028048 -38 12 11.024763516   19.03 16.2 16.72   ~ 279 1
136 QSO B1145-071 QSO 11 47 51.5538881904 -07 24 41.138624592   19.0 18.5 18.10   ~ 169 1
137 Ton 599 QSO 11 59 31.8338889192 +29 14 43.826803116   14.80 14.41 17.652 13.39 ~ 860 1
138 QSO B1213-172 QSO 12 15 46.75176110 -17 31 45.4029502     21.4 17.50   ~ 132 1
139 4C 35.28 QSO 12 15 55.5976197528 +34 48 15.195191868     20.0 19.4   ~ 102 1
140 7C 1219+2830 BLL 12 21 31.6904439888 +28 13 58.500308172   16.81 16.11 14.24   ~ 819 1
141 4C 04.42 QSO 12 22 22.5499375968 +04 13 15.776624496   17.88 17.98 17.06   ~ 282 1
142 8C 1221+809 BLL 12 23 40.4916349032 +80 40 04.336949928     19.0 19.3   ~ 99 1
143 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1708 2
144 [VV98] J122847.5+370612 QSO 12 28 47.4236471040 +37 06 12.092860800   18.74 18.28 17.91   ~ 82 1
145 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6738 3
146 QSO B1236+077 QSO 12 39 24.5884477920 +07 30 17.189242596   19.1 20.1 17.92   ~ 111 1
147 QSO J1246-0730 QSO 12 46 04.2323029752 -07 30 46.575886284   17.6 18.0 18.2   ~ 176 1
148 QSO J1246-2547 QSO 12 46 46.8017282136 -25 47 49.289500104   17.65 17.41 16.96 15.5 ~ 252 1
149 QSO B1252+119 QSO 12 54 38.2556261400 +11 41 05.894304684   16.99 16.64 16.76   ~ 261 1
150 QSO B1251-713 QSO 12 54 59.9212565304 -71 38 18.434350068   20.55       ~ 50 0
151 QSO B1255-316 QSO 12 57 59.0607048000 -31 55 16.851798876   19.06   17.86   ~ 99 1
152 ICRF J130020.9+141718 QSO 13 00 20.9186303256 +14 17 18.528034956   19.50 19.17 18.9   ~ 62 1
153 7C 130046.50+580438.00 QSO 13 02 52.4659630896 +57 48 37.614372228   20.47 19.76 20.63   ~ 84 1
154 4C 12.46 BLL 13 09 33.9325265472 +11 54 24.551972208 18.95 18.72 18.28 18.16   ~ 123 1
155 7C 1308+3236 BLL 13 10 28.6639899312 +32 20 43.774028664   15.61 15.24 17.91   ~ 807 1
156 7C 130838.79+324935.00 QSO 13 10 59.4027852240 +32 33 34.450047648     16.8 19.00   ~ 81 1
157 QSO B1313-333 QSO 13 16 07.9862714376 -33 38 59.173382076   18.04 20.0 17.23   ~ 235 1
158 QSO B1334-127 QSO 13 37 39.7829208840 -12 57 24.693846264   18.5 18.5 16.22   ~ 461 1
159 ICRF J135256.5-441240 BLL 13 52 56.5350084840 -44 12 40.389393996   16.95 16.37     ~ 107 3
160 ICRF J135704.4+191907 Sy1 13 57 04.4366598768 +19 19 07.371837768   16.33 16.03 15.3   ~ 431 2
161 QSO J1357-1527 QSO 13 57 11.2449596232 -15 27 28.783448712   18.13   18.40   ~ 134 1
162 6C 135734+765743 QSO 13 57 55.37153147 +76 43 21.0510512     19.0 20.27   ~ 101 1
163 QSO B1402+044 QSO 14 05 01.1198802840 +04 15 35.817496668   19.86 19.53 19.22   ~ 180 1
164 QSO B1404+286 BLL 14 07 00.3941769384 +28 27 14.692128372   16.13 15.35 10.29   ~ 731 2
165 QSO B1413+135 BLL 14 15 58.81750938 +13 20 23.7129069   21.055 20.000 18.461   ~ 405 1
166 6C 141804+543700 BLL 14 19 46.5974051952 +54 23 14.787857796   16.17 15.65 14.16   ~ 563 1
167 6C 141743+383524 QSO 14 19 46.6132202232 +38 21 48.484991196   19.88 19.66 19.25   ~ 155 1
168 QSO B1424-41 QSO 14 27 56.2977548952 -42 06 19.437654096   18.48 17.7 16.30   ~ 437 1
169 QSO B1445+101 QSO 14 45 16.4651373360 +09 58 36.075661572   18.58 17.78     ~ 383 1
170 QSO B1445-161 QSO 14 48 15.0545542872 -16 20 24.553283784   20.5 18.9 19.4   ~ 63 1
171 ICRF J145427.4-374733 Sy1 14 54 27.4100141736 -37 47 33.146165508   16.36 16.69 16.14   ~ 165 1
172 QSO B1502+1041 Bla 15 04 24.9800240304 +10 29 39.197268420   18.97 18.56 18.94   ~ 518 1
173 QSO B1504-167 QSO 15 07 04.7863621776 -16 52 30.274176216   18.40 18.5 17.00   ~ 221 1
174 QSO B1508+572 QSO 15 10 02.9198786520 +57 02 43.366875216   22.73 21.38 19.23   ~ 177 0
175 4C -05.64 QSO 15 10 53.5915864584 -05 43 07.417490736   17.44 17.21     ~ 204 1
176 QSO J1512-0906 Bla 15 12 50.5330369584 -09 05 59.830296360   16.74 16.54     ~ 1239 1
177 QSO B1514+197 BLL 15 16 56.7965669256 +19 32 12.991197408 18.59 18.19 18.7 17.51   ~ 146 1
178 QSO B1514-24 BLL 15 17 41.8134049824 -24 22 19.482207024   15.13 14.00 13.95   ~ 704 3
179 QSO B1519-273 BLL 15 22 37.6759581696 -27 30 10.784438784   18.72 18.5 17.42   ~ 273 1
180 QSO B1532+016 QSO 15 34 52.4540983176 +01 31 04.205615016   19.0 18.5 18.58   ~ 181 2
181 QSO B1546+0246 QSO 15 49 29.4369280464 +02 37 01.161302952   17.57 17.42 15.53   ~ 334 1
182 QSO B1555+001 QSO 15 57 51.4338994584 -00 01 50.414034648   20.10 19.72 18.75   ~ 172 1
183 QSO J1559+0304 QSO 15 59 30.9738114288 +03 04 48.246498444     19.8 19.77   ~ 70 1
184 4C 33.38 Bla 16 02 07.26346106 +33 26 53.0724368     23.0 23   ~ 126 1
185 QSO B1614+051 QSO 16 16 37.5569529792 +04 59 32.744135148   19.60 19.17 19.49   ~ 180 2
186 QSO B1622-253 QSO 16 25 46.8886080600 -25 27 38.336613804   21.3 20.6 19.60   ~ 323 1
187 4C 41.32 QSO 16 25 57.66971410 +41 34 40.6292986     22 21.73   ~ 161 1
188 QSO B1622-297 Bla 16 26 06.0209027208 -29 51 26.968763916   18.41 20.5 17.6   ~ 392 0
189 NGC 6251 Sy2 16 32 31.9740654384 +82 32 16.403167068 15.24 14.66 12.89 7.62   ~ 697 0
190 4C 38.41 QSO 16 35 15.4928147784 +38 08 04.499799360   18.14 17.97 17.25   ~ 809 1
191 ICRF J163813.4+572023 Sy1 16 38 13.4562758136 +57 20 23.980140888     17.0 16.94   ~ 330 1
192 6C 163852+395305 QSO 16 40 29.6332404024 +39 46 46.030865700   18.4 16.5 18.75   ~ 291 2
193 4C 69.21 QSO 16 42 07.8484347528 +68 56 39.767837172   19.723   19.219   ~ 291 1
194 4C 39.49 BLL 16 53 52.2160772976 +39 45 36.613228860 14.09 14.15 13.29 8.26   ~ 2037 2
195 QSO J1658+0515 QSO 16 58 33.4471896264 +05 15 16.442476596   17.00 16.54 16.21   ~ 215 1
196 QSO J1700-2610 QSO 17 00 53.1542036424 -26 10 51.722383908   16.50       ~ 99 1
197 QSO B1705+0152 QSO 17 07 34.4149234248 +01 48 45.698402592   18.5 18.9 18.52   ~ 96 1
198 ICRF J170934.3-172853 QSO 17 09 34.3456016088 -17 28 53.360271228     17.5 20.90   ~ 43 1
199 7C 172601.30+453309.00 BLL 17 27 27.6508316304 +45 30 39.731315580   19.0 19.0 16.64   ~ 184 1
200 ICRF J172824.9+042704 Sy1 17 28 24.9528713424 +04 27 04.915338552   17.43 16.99 16.24   ~ 206 1
201 QSO B1730-130 QSO 17 33 02.7055087032 -13 04 49.545516612   18 18.5 18.78 17.39 ~ 1072 1
202 4C 51.37 Bla 17 40 36.9781162752 +52 11 43.408067208   18.16 18.5 16.73   ~ 383 1
203 QSO B1741-038 QSO 17 43 58.8561752304 -03 50 04.618401684     18.5 17.98   ~ 509 1
204 6C 174400+554318 QSO 17 44 56.6050046664 +55 42 17.153396424   13.0 13.5     ~ 72 1
205 QSO B1743+173 QSO 17 45 35.2081057080 +17 20 01.418697672     19.0 18.21   ~ 68 1
206 4C 62.29 QSO 17 46 14.0345261040 +62 26 54.737064816   20.91 19.51     ~ 110 1
207 4C 09.57 BLL 17 51 32.8186120872 +09 39 00.728629416   17.46 16.78 15.57   ~ 889 1
208 7C 175844.60+384828.00 QSO 18 00 24.7653461736 +38 48 30.697069572   17.8 17.8 17.04   ~ 139 1
209 8C 1803+784 BLL 18 00 45.6838528560 +78 28 04.018028016   16.4 16.4 15.46   ~ 701 1
210 3C 371 BLL 18 06 50.6802916920 +69 49 28.109609256   14.77 14.22 11.39   ~ 821 2
211 ICRF J180957.8-455241 BLL 18 09 57.8719842960 -45 52 41.007939960   16.89   15.06   ~ 52 1
212 ICRF J181945.3-552120 QSO 18 19 45.39951849 -55 21 20.7453785   19.19 16.0 21.50   ~ 65 1
213 4C 56.27 BLL 18 24 07.0679485560 +56 51 01.479645612   18.9 18.4 16.48   ~ 456 1
214 ICRF J184916.0+670541 Sy1 18 49 16.0719656904 +67 05 41.681210424     20 17.45   ~ 237 1
215 ICRF J185457.2+735119 Sy1 18 54 57.3000303816 +73 51 19.907445924     17.5 16.39   ~ 67 1
216 ICRF J190255.9+315941 Sy1 19 02 55.9388845368 +31 59 41.699274720     17.5     ~ 263 2
217 QSO B1908-202 QSO 19 11 09.6526857480 -20 06 55.109271780   18.21   18.14   ~ 253 0
218 [VV2006] J192332.2-210433 QSO 19 23 32.1900306576 -21 04 33.324574944   15.32 17.50 16.70   ~ 137 2
219 QSO B1921-293 BLL 19 24 51.0555700728 -29 14 30.118109640   18.71 18.21 15.07   ~ 783 0
220 ICRF J192559.6+210626 BLL 19 25 59.60535560 +21 06 26.1620442           ~ 188 1
221 4C 73.18 BLL 19 27 48.4947009120 +73 58 01.572558816     15.5 15.11   ~ 509 2
222 QSO B1933-400 QSO 19 37 16.2170885184 -39 58 01.550896824   18.15 19 17.43   ~ 177 2
223 QSO B1937-1009 BLL 19 39 57.2566747152 -10 02 41.522299692   18.800 19.0 17.188   ~ 182 1
224 QSO B1935-692 QSO 19 40 25.5281346264 -69 07 56.972724240   18.36 18.8     ~ 109 1
225 QSO B1954+513 QSO 19 55 42.7384954488 +51 31 48.542394936     18.5 17.34   ~ 227 1
226 QSO B1954-388 QSO 19 57 59.8193971392 -38 45 06.356631852   18.47 17.07 16.73   ~ 199 1
227 QSO B1958-179 QSO 20 00 57.0904184064 -17 48 57.674464236   18.02 17.46 15.33   ~ 239 1
228 QSO B2000-330 QSO 20 03 24.1161711720 -32 51 45.136882080   18.83 18.4 17.11   ~ 261 1
229 QSO B2029+121 BLL 20 31 54.9939999792 +12 19 41.345344596     18.5 17.42   ~ 143 1
230 3C 418.0 QSO 20 38 37.0347144096 +51 19 12.660083976   21.30 20.00 18.9   ~ 287 0
231 QSO B2052-474 QSO 20 56 16.3597417176 -47 14 47.625469512   18.29 19.1 18.07   ~ 287 1
232 QSO B2059+034 QSO 21 01 38.8344870144 +03 41 31.320939192   18.13 17.78 17.68   ~ 157 1
233 QSO B2106-413 QSO 21 09 33.1890328608 -41 10 20.613656604   20.20 21.0 20.41   ~ 104 1
234 QSO J2115+295 QSO 21 15 29.4133345104 +29 33 38.366174628     19.5 19.26   ~ 152 1
235 ICRF J211630.8-805355 QSO 21 16 30.84588551 -80 53 55.2231002   20   19.50   ~ 34 1
236 QSO J2123+0535 QSO 21 23 44.5173734952 +05 35 22.093702692   18.3 17.5 19.86   ~ 271 1
237 QSO B2128-123 BLL 21 31 35.2617909696 -12 07 04.795364172   16.33 16.11 15.87   ~ 437 1
238 QSO B2136+1410 QSO 21 39 01.3093296432 +14 23 35.988162648     18.5 18.22   ~ 241 1
239 ICRF J214622.9-152543 Sy1 21 46 22.9790702760 -15 25 43.888843632   17.70 17.27 17.20   ~ 116 1
240 4C 06.69 QSO 21 48 05.4586454304 +06 57 38.602799388   16.85 16.47 15.06   ~ 631 1
241 ICRF J215137.8+055212 Sy1 21 51 37.87549312 +05 52 12.9545524   23.700 22.050 20.850   ~ 109 1
242 QSO B2149-306 QSO 21 51 55.5238655808 -30 27 53.700055236   17.95 18.0 17.48   ~ 235 1
243 QSO B2150+173 BLL 21 52 24.8179245216 +17 34 37.789284684     17.9 17.98   ~ 142 2
244 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2143 1
245 4C 31.63 BLL 22 03 14.9756830008 +31 45 38.269473228   15.85 15.58 14.33   ~ 475 1
246 QSO B2204-54 QSO 22 07 43.7332112616 -53 46 33.821317452   18.45 18.0 18.20   ~ 146 1
247 BWE 2209+2340 QSO 22 12 05.9664991416 +23 55 40.543886604   19   19.69   ~ 204 1
248 4C -03.79 QSO 22 18 52.0376984088 -03 35 36.879875124   16.93 16.38 16.15   ~ 326 1
249 3C 446 BLL 22 25 47.2594205952 -04 57 01.390436856   18.83 18.39 16.3   ~ 795 1
250 AT20G J222940-083254 QSO 22 29 40.0843811352 -08 32 54.437624196   17.80 17.41 17.81   ~ 320 1
251 4C 11.69 QSO 22 32 36.4089639768 +11 43 50.904601176   17.75 17.33     ~ 1052 2
252 QSO B2232-488 QSO 22 35 13.2365933856 -48 35 58.795714752   17.61 17.2     ~ 120 1
253 6C 223524+730738 QSO 22 36 38.5945387704 +73 22 52.667933808       19.90   ~ 38 1
254 QSO J2246-1206 QSO 22 46 18.2322488304 -12 06 51.278055084   16.63 16.45 15.99   ~ 271 1
255 QSO B2250+194 BLL 22 53 07.3691755584 +19 42 34.627791744   17.5 17.5 16.22   ~ 65 2
256 QSO B2253+417 QSO 22 55 36.7076875296 +42 02 52.531913940     18.8     ~ 75 1
257 QSO B2254+0727 BLL 22 57 17.3029968648 +07 43 12.297630108   17.07 16.36     ~ 291 1
258 ICRF J225805.9-275821 Sy1 22 58 05.9627218728 -27 58 21.258376248   17.34 16.77 17.20   ~ 327 1
259 BWE 2318+0457 QSO 23 20 44.8566627408 +05 13 49.950278148   18.6 19.0     ~ 144 1
260 B2 2319+27 QSO 23 21 59.8620449256 +27 32 46.446347400   19 19.0 18.8   ~ 124 1
261 QSO B2320-035 QSO 23 23 31.9537689696 -03 17 05.025045444   18.6   18.16   ~ 184 1
262 QSO B2326-477 QSO 23 29 17.7043623168 -47 30 19.113949332   16.93 16.79 16.30   ~ 177 1
263 QSO B2329-16 BLL 23 31 38.6527958352 -15 56 57.011907156   20.72   20.65   ~ 122 1
264 QSO B2335-027 QSO 23 37 57.3393193968 -02 30 57.629433240   18.1 19.27 18.97   ~ 112 1
265 QSO B2355-534 BLL 23 57 53.2654228152 -53 11 13.688384748   18.63 17.8 16.89   ~ 148 1
266 QSO J2358-1020 QSO 23 58 10.8819551832 -10 20 08.611518588   19.16 18.91 18.00   ~ 130 0
267 QSO B2357+385 QSO 23 59 33.1808951088 +38 50 42.319562172   19.0 18.0 19.1   ~ 55 1

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2022.10.03-01:43:07

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