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


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.01CET13:52:24

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 - 2021
#notes
1 QSO B0003+380 QSO 00 05 57.17539168 +38 20 15.1489409   19.4 18.10 17.16   ~ 109 1
2 QSO B0003-066 BLL 00 06 13.89288849 -06 23 35.3353162   19.1   17.14   ~ 269 1
3 QSO B0008-264 BLL 00 11 01.24673846 -26 12 33.3770171   19.53   19.64   ~ 70 0
4 ICRF J001331.1+405137 Sy1 00 13 31.13020334 +40 51 37.1441040   17.9 17.9     ~ 99 1
5 QSO B0013-005 QSO 00 16 11.08855479 -00 15 12.4453413   20.44 19.98 19.72   ~ 125 1
6 6C 001403+811827 BLL 00 17 08.4748554 +81 35 08.136591   17.60 16.52 15.95   ~ 361 1
7 QSO B0016+73 QSO 00 19 45.7863740 +73 27 30.017554     19.0 18.26   ~ 277 1
8 7C 0059+5808 QSO 01 02 45.76238248 +58 24 11.1366009   20.09 19.22 18.57 17.90 ~ 192 1
9 QSO B0104-408 QSO 01 06 45.10796851 -40 34 19.9602291   18.60 19.0 19.25   ~ 120 0
10 4C 01.02 QSO 01 08 38.7712667820 +01 35 00.318317679   18.54 18.39 19.05   ~ 469 1
11 QSO B0111+021 BLL 01 13 43.14494950 +02 22 17.3163553   16.4 16.0 11.22   ~ 122 1
12 QSO B0119+115 QSO 01 21 41.59504339 +11 49 50.4131012   19.5 19.0 18.61   ~ 165 1
13 QSO B0119+041 QSO 01 21 56.86169956 +04 22 24.7343340   19.2 19.5 19.40   ~ 170 1
14 QSO B0130-17 QSO 01 32 43.48746261 -16 54 48.5218416   18.75 18.44 15.44   ~ 186 1
15 ICRF J013305.7-520003 Sy1 01 33 05.7626207272 -52 00 03.950447146   18.68 20.3 18.63   ~ 83 0
16 QSO B0133+476 QSO 01 36 58.59480585 +47 51 29.1000445     18.0 19.25 15.21 ~ 452 1
17 ICRF J013738.3-243053 Sy1 01 37 38.3465008708 -24 30 53.881956849   17.47 17.33 16.57   ~ 176 1
18 QSO B0146+056 QSO 01 49 22.37089 +05 55 53.5687   20.7 19.0 20.30   ~ 116 1
19 QSO B0201+113 QSO 02 03 46.65705872 +11 34 45.4095674   19.5 19.5 19.41   ~ 185 1
20 7C 020209.69+315812.00 QSO 02 05 04.92536007 +32 12 30.0954538     18.00 17.40   ~ 196 1
21 QSO B0208-512 BLL 02 10 46.2000629834 -51 01 01.893312084   17.10 16.93 14.82   ~ 386 1
22 QSO J0217+0144 QSO 02 17 48.9547510 +01 44 49.698899   16.74 16.09 18.51 13.29 ~ 375 1
23 4C 06.11 QSO 02 24 28.42819659 +06 59 23.3415393   20.8 20.0 17.78   ~ 147 1
24 4C 13.14 QSO 02 31 45.89405431 +13 22 54.7162668   17.96 17.71 17.93   ~ 257 1
25 4C 28.07 QSO 02 37 52.40567732 +28 48 08.9900231     18.5 16.99   ~ 510 1
26 NGC 1052 GiP 02 41 04.79851 -08 15 20.7517 11.84 11.41 10.47 10.71   ~ 1159 2
27 QSO B0239+108 QSO 02 42 29.17085456 +11 01 00.7279554   20.0   19.66   ~ 104 1
28 QSO B0256+075 QSO 02 59 27.07662273 +07 47 39.6429493   18 18 16.9   ~ 161 1
29 4C 47.08 BLL 03 03 35.24222254 +47 16 16.2754406   17.54 16.95 16.2   ~ 245 1
30 QSO B0302-623 QSO 03 03 50.63134799 -62 11 25.5498711   19.48   17.87   ~ 121 1
31 NGC 1218 Sy1 03 08 26.2238190 +04 06 39.300921   12.84       ~ 346 1
32 QSO B0306+101 QSO 03 09 03.62350016 +10 29 16.3409599   18.45   19.91   ~ 164 1
33 QSO B0308-611 QSO 03 09 56.09915397 -60 58 39.0561502   19.00 18.5 18.18   ~ 111 1
34 ICRF J031951.2+190131 QSO 03 19 51.25674 +19 01 31.2908   19   17.76   ~ 42 1
35 QSO B0319+12 QSO 03 21 53.10350836 +12 21 13.9537265   19 19     ~ 122 1
36 4C 32.14 QSO 03 36 30.10760600 +32 18 29.3422210     17.50 16.6   ~ 584 1
37 QSO B0336-0156 QSO 03 39 30.93778751 -01 46 35.8041062   18.96 18.41 17.33   ~ 512 1
38 ICRF J034506.4+145349 QSO 03 45 06.41654424 +14 53 49.5582021       20.00   ~ 41 1
39 QSO B0400-319 QSO 04 02 21.26601027 -31 47 25.9453862   20.2   20.75   ~ 80 1
40 QSO B0400+258 QSO 04 03 05.58606763 +26 00 01.5028075     18 19.00   ~ 183 1
41 QSO J0403-3605 QSO 04 03 53.7499146834 -36 05 01.914911296   17.04 17.17 16.67   ~ 240 1
42 PKS 0405-123 Sy1 04 07 48.4309594137 -12 11 36.660481492   15.09 14.86 14.7   ~ 472 1
43 QSO B0406+121 BLL 04 09 22.00871268 +12 17 39.8477204   20.5   18.27   ~ 100 1
44 QSO B0414-189 QSO 04 16 36.54445140 -18 51 08.3400284   18.89 18.0 18.51   ~ 144 1
45 QSO B0420-0127 QSO 04 23 15.80072776 -01 20 33.0654034   17.50 17.00 16.28   ~ 1071 3
46 QSO B0422-380 QSO 04 24 42.24370765 -37 56 20.7841314   17.96 18.08 18.03   ~ 91 1
47 QSO B0422+004 BLL 04 24 46.8423020674 +00 36 06.327828096 16.15 15.94 16.98     ~ 326 1
48 QSO J0429+2724 BLL 04 29 52.96076804 +27 24 37.8762939   18.6       ~ 30 0
49 Mrk 1506 Sy1 04 33 11.0958197353 +05 21 15.617543663   15.72 15.05 10.08   ~ 1861 2
50 QSO B0430+2859 BLL 04 33 37.82985993 +29 05 55.4770346   19.0 17.80 17.06   ~ 125 1
51 QSO B0434-188 QSO 04 37 01.48273818 -18 44 48.6134950   19.11 19.0 19.62   ~ 98 1
52 QSO B0437-454 QSO 04 39 00.85466883 -45 22 22.5628657   20.44 20.6 19.48   ~ 74 0
53 ICRF J044331.6+344106 Bz? 04 43 31.63520255 +34 41 06.6640222           ~ 31 1
54 QSO J0457-2324 QSO 04 57 03.1792314200 -23 24 52.020969479   18.85 18.5 16.56   ~ 338 1
55 QSO J0459+0229 QSO 04 59 52.05066226 +02 29 31.1765607   18.2 19     ~ 154 1
56 QSO B0502+049 QSO 05 05 23.18472342 +04 59 42.7245908   18.7 19.0 17.58   ~ 124 1
57 QSO B0506-612 QSO 05 06 43.9895985805 -61 09 40.990800301   17.16 16.85 16.9   ~ 167 2
58 QSO B0454+844 BLL 05 08 42.36345199 +84 32 04.5440155     16.5 18.95   ~ 230 1
59 QSO B0507+179 QSO 05 10 02.36912982 +18 00 41.5816534   20.0 19.0 19.09   ~ 325 1
60 QSO B0516-621 BLL 05 16 44.9259759952 -62 07 05.388736635 18.50 18.09 17.85 17.46   ~ 99 1
61 QSO B0521-365 BLL 05 22 57.9839686440 -36 27 30.847737786   15.26 14.62 14.48   ~ 726 2
62 QSO J0530+13 QSO 05 30 56.41672 +13 31 55.1495     20.0 19.35   ~ 884 1
63 QSO B0537-441 BLL 05 38 50.36155219 -44 05 08.9389165   15.77 16.48 16   ~ 795 2
64 ICRF J053942.3+143345 QSO 05 39 42.36599103 +14 33 45.5616993           ~ 62 1
65 QSO B0537-286 QSO 05 39 54.28147645 -28 39 55.9478122   19.70 20.0 18.789   ~ 243 2
66 QSO B0539-057 QSO 05 41 38.08338 -05 41 49.4284     20.4 20.70   ~ 211 2
67 NVSS J054734+272157 Rad 05 47 34.14892109 +27 21 56.8425667           ~ 34 1
68 6C 060237+672110 QSO 06 07 52.67160861 +67 20 55.4099805   20.6 20.6 20.21   ~ 87 1
69 QSO B0607-157 QSO 06 09 40.9477650070 -15 42 40.649794982   18.47 18.0 19.90   ~ 291 1
70 QSO J0635-7516 QSO 06 35 46.5080299 -75 16 16.815501   15.96 15.75 15.82   ~ 514 1
71 ICRF J063920.9-334600 BLL 06 39 20.90464 -33 46 00.1134     20.50 20.30   ~ 30 1
72 QSO B0636+68 BLL 06 42 04.2571549110 +67 58 35.621670643     16.46 16.01   ~ 207 1
73 7C 064253.00+445430.00 QSO 06 46 32.02599463 +44 51 16.5901237   19.57 18.49 18.64   ~ 326 1
74 QSO J0650-1637 QSO 06 50 24.58185521 -16 37 39.7251917   22.09       ~ 94 1
75 ICRF J065917.9+081330 QSO 06 59 17.99603428 +08 13 30.9533022           ~ 27 1
76 ICRF J070001.5+170921 QSO 07 00 01.52553646 +17 09 21.7014901   21.0       ~ 57 1
77 4C 47.23 BLL 07 10 46.10487679 +47 32 11.1427167   18.2 18.2 13.9   ~ 126 1
78 8C 0716+714 BLL 07 21 53.4484901266 +71 20 36.362058601   15.5 14.17 14.27   ~ 1141 1
79 4C 14.23 BLL 07 25 16.80776128 +14 25 13.7466902       17.48   ~ 110 1
80 QSO B0723-007 BLL 07 25 50.63996171 -00 54 56.5441985   17.39 16.57 15.82   ~ 219 1
81 ICRF J072611.7+791131 Bz? 07 26 11.73524096 +79 11 31.0162085       23.08   ~ 44 0
82 QSO J0738+1742 BLL 07 38 07.39374766 +17 42 18.9982302   16.76 16.22 15.78   ~ 898 1
83 QSO B0738-674 QSO 07 38 56.49622760 -67 35 50.8260388     19.8 20.00   ~ 48 1
84 QSO B0736+01 QSO 07 39 18.03389693 +01 37 04.6178588   16.90 16.47 16.19   ~ 629 1
85 QSO B0742+103 QSO 07 45 33.05952141 +10 11 12.6923363       23.72   ~ 177 1
86 [VV2006] J074625.9+254901 QSO 07 46 25.87417871 +25 49 02.1347553   19.94 19.69 19.2   ~ 128 2
87 QSO B0745+241 QSO 07 48 36.10927469 +24 00 24.1100315   19.70 18.89 17.88   ~ 181 1
88 QSO B0748+126 QSO 07 50 52.0457430 +12 31 04.828260   17.67 17.28 17.16   ~ 283 1
89 4C 54.15 BLL 07 53 01.38456785 +53 52 59.6370745   18.5   16.77   ~ 130 1
90 QSO B0754+10 BLL 07 57 06.64294682 +09 56 34.8523471   15.43 15.00 15.99   ~ 405 1
91 7C 080458.39+495918.00 QSO 08 08 39.66628353 +49 50 36.5304035   19.55 19.18 18.34   ~ 328 2
92 7C 080533.60+410130.00 QSO 08 08 56.65203923 +40 52 44.8888616   19.87 19.41 16.61   ~ 98 1
93 QSO B0818-128 BLL 08 20 57.44761533 -12 58 59.1690971   15.30 15.00 16.5   ~ 161 1
94 4C 56.16A QSO 08 24 47.23635309 +55 52 42.6693506   18.52 18.19 17.82   ~ 163 1
95 QSO B0823+033 BLL 08 25 50.33835429 +03 09 24.5200730   17.81 17.23 16.91   ~ 296 1
96 QSO B0826-373 QSO 08 28 04.78022012 -37 31 06.2809892   16       ~ 43 0
97 7C 082754.29+242103.00 QSO 08 30 52.08619070 +24 10 59.8204032   17.62 17.26 16.30   ~ 470 1
98 QSO B0829+047 BLL 08 31 48.8771360822 +04 29 39.086736269   17.10 16.4 14.55   ~ 421 2
99 QSO B0839+187 QSO 08 42 05.09417058 +18 35 40.9905528   16.63 16.36 16.56   ~ 165 2
100 4C 47.29 QSO 09 03 03.99009765 +46 51 04.1374256   19.90 19.44 18.7   ~ 230 1
101 QSO B0919-260 QSO 09 21 29.3546683923 -26 18 43.380586532   18.46 18.41 18.01   ~ 120 1
102 6C 091739+622838 QSO 09 21 36.23106854 +62 15 52.1803472   19.76 19.26 18.96   ~ 318 1
103 QSO B0920-397 QSO 09 22 46.41826064 -39 59 35.0683561   18.12 18.8     ~ 100 1
104 6C 092005+390241 Bz? 09 23 14.45293105 +38 49 39.9101375           ~ 35 1
105 ICRF J092751.8-203451 Sy1 09 27 51.8243946391 -20 34 51.233118162   16.59 16.40 16.00   ~ 140 1
106 QSO B0952+179 QSO 09 54 56.82361250 +17 43 31.2222114   17.31 17.23     ~ 197 1
107 Ton 469 Sy1 09 58 20.9495949602 +32 24 02.209578357   15.88 15.78 15.51   ~ 400 1
108 6C 095456+654857 BLL 09 58 47.2452838930 +65 33 54.821524491     17.0 15.75   ~ 622 1
109 QSO J1007+1356 QSO 10 07 41.49808563 +13 56 29.6008672     19.0 18.59   ~ 107 1
110 4C 40.25 QSO 10 23 11.56566179 +39 48 15.3854217   17.5 17.5 17.18   ~ 130 1
111 4C 19.34 QSO 10 24 44.80959508 +19 12 20.4156249   17.95 17.49 16.41   ~ 142 1
112 QSO B1030+074 QSO 10 33 34.02429 +07 11 26.1478     20.34 20.22   ~ 99 1
113 QSO B1032-199 QSO 10 35 02.15530220 -20 11 34.3595425   18.10 19.0 18.53   ~ 105 1
114 QSO B1034-293 QSO 10 37 16.07973476 -29 34 02.8133345   16.46 16.46 17.54   ~ 274 1
115 4C 06.41 BLL 10 41 17.16249895 +06 10 16.9236835   16.86 16.70 16.14   ~ 275 1
116 6C 103844+524909 QSO 10 41 46.78163764 +52 33 28.2313168   16.96 18.5 16.39   ~ 120 1
117 6C 103912+811006 QSO 10 44 23.06254789 +80 54 39.4430277     16.5 18.29   ~ 185 1
118 ICRF J104806.6-190935 Sy1 10 48 06.62060701 -19 09 35.7266240   18.59 18.5 17.10   ~ 161 1
119 6C 104451+715930 QSO 10 48 27.6207767205 +71 43 35.941655031     19.0 17.49   ~ 189 1
120 4C 21.28 QSO 10 51 48.78907490 +21 19 52.3138145     18.5 17.72   ~ 129 1
121 6C 105327+702759 QSO 10 56 53.61750690 +70 11 45.9156324   18.5 18.5 19.32   ~ 90 1
122 QSO J1058+8114 QSO 10 58 11.53537962 +81 14 32.6751819   18.5 20.0 18.14   ~ 87 1
123 4C 01.28 BLL 10 58 29.60520747 +01 33 58.8237691   18.74 18.28 16.68   ~ 657 2
124 QSO B1057-797 BLL 10 58 43.30977041 -80 03 54.1597166   19.08   17.31   ~ 155 0
125 MRC 1101-536 BLL 11 03 52.22167 -53 57 00.6964   18.30 17.9     ~ 62 1
126 Mrk 421 BLL 11 04 27.3139210166 +38 12 31.798324828   13.50 12.90 8.31   ~ 2410 1
127 QSO B1111+149 QSO 11 13 58.69508359 +14 42 26.9525965   17.89 17.57 17.41   ~ 100 1
128 CTD 74 QSO 11 25 53.71192285 +26 10 19.9786840   18.62 18.51 18.39   ~ 126 1
129 QSO B1124-186 QSO 11 27 04.39244958 -18 57 17.4416582   19.17   19.23   ~ 191 1
130 QSO J1130-1449 QSO 11 30 07.05259287 -14 49 27.3881476   17.17 16.90 16 16.97 ~ 633 1
131 QSO B1128+385 QSO 11 30 53.2826100 +38 15 18.546915   19.11 18.80 19.42   ~ 173 1
132 [VV2006] J113320.1+004052 QSO 11 33 20.05579171 +00 40 52.8372903   18.5   18.88   ~ 64 2
133 QSO B1143-245 QSO 11 46 08.1038916032 -24 47 32.896655354   17.97 18.0 17.20   ~ 113 1
134 6C 114419+401458 QSO 11 46 58.29791629 +39 58 34.3045026   18.80 18.45 18.58   ~ 180 1
135 QSO B1144-3755 BLL 11 47 01.37070177 -38 12 11.0234199   19.03 16.2 16.72   ~ 261 1
136 QSO B1145-071 QSO 11 47 51.55402876 -07 24 41.1410887   19.0 18.5 18.10   ~ 161 1
137 Ton 599 QSO 11 59 31.83390975 +29 14 43.8268741   14.80 14.41 17.652 13.39 ~ 804 1
138 QSO B1213-172 QSO 12 15 46.75176110 -17 31 45.4029502     21.4 17.50   ~ 127 1
139 4C 35.28 QSO 12 15 55.60104196 +34 48 15.2206760     20.0 19.4   ~ 100 1
140 7C 1219+2830 BLL 12 21 31.6902446544 +28 13 58.500383827   16.81 16.11 14.24   ~ 783 1
141 4C 04.42 QSO 12 22 22.54962080 +04 13 15.7761797   17.88 17.98 17.06   ~ 252 1
142 8C 1221+809 BLL 12 23 40.49373854 +80 40 04.3404390     19.0 19.3   ~ 93 1
143 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1651 2
144 [VV98] J122847.5+370612 QSO 12 28 47.42367744 +37 06 12.0958631   18.74 18.28 17.91   ~ 76 1
145 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6301 3
146 QSO B1236+077 QSO 12 39 24.58832517 +07 30 17.1892686   19.1 20.1 17.92   ~ 100 1
147 QSO J1246-0730 QSO 12 46 04.23210358 -07 30 46.5745473   17.6 18.0 18.2   ~ 169 1
148 QSO J1246-2547 QSO 12 46 46.80203492 -25 47 49.2887900   17.65 17.41 16.96 15.5 ~ 239 1
149 QSO B1252+119 QSO 12 54 38.25561161 +11 41 05.8951798   16.99 16.64 16.76   ~ 246 1
150 QSO B1251-713 QSO 12 54 59.92144870 -71 38 18.4366697   20.55       ~ 48 0
151 QSO B1255-316 QSO 12 57 59.06081737 -31 55 16.8516980   19.06   17.86   ~ 95 1
152 ICRF J130020.9+141718 QSO 13 00 20.91881952 +14 17 18.5316703   19.50 19.17 18.9   ~ 53 1
153 7C 130046.50+580438.00 QSO 13 02 52.46527568 +57 48 37.6093180   20.47 19.76 20.63   ~ 76 1
154 4C 12.46 BLL 13 09 33.93245071 +11 54 24.5531525 18.95 18.72 18.28 18.16   ~ 114 1
155 7C 1308+3236 BLL 13 10 28.66387 +32 20 43.7831   15.61 15.24 17.91   ~ 754 1
156 7C 130838.79+324935.00 QSO 13 10 59.40272936 +32 33 34.4496333     16.8 19.00   ~ 72 1
157 QSO B1313-333 QSO 13 16 07.98593995 -33 38 59.1725057   18.04 20.0 17.23   ~ 226 1
158 QSO B1334-127 QSO 13 37 39.78277768 -12 57 24.6932620   18.5 18.5 16.22   ~ 432 1
159 ICRF J135256.5-441240 BLL 13 52 56.53491 -44 12 40.3874   16.95 16.37     ~ 102 3
160 ICRF J135704.4+191907 Sy1 13 57 04.43665381 +19 19 07.3724675   16.33 16.03 15.3   ~ 416 3
161 QSO J1357-1527 QSO 13 57 11.24497976 -15 27 28.7867232   18.13   18.40   ~ 132 1
162 6C 135734+765743 QSO 13 57 55.37153147 +76 43 21.0510512     19.0 20.27   ~ 96 1
163 QSO B1402+044 QSO 14 05 01.11981424 +04 15 35.8189966   19.86 19.53 19.22   ~ 169 1
164 QSO B1404+286 BLL 14 07 00.3933203928 +28 27 14.695133019   16.13 15.35 10.29   ~ 688 2
165 QSO B1413+135 BLL 14 15 58.81750938 +13 20 23.7129069   21.055 20.000 18.461   ~ 381 1
166 6C 141804+543700 BLL 14 19 46.5976435439 +54 23 14.787308481   16.17 15.65 14.16   ~ 540 1
167 6C 141743+383524 QSO 14 19 46.61376070 +38 21 48.4750925   19.88 19.66 19.25   ~ 138 1
168 QSO B1424-41 QSO 14 27 56.29756536 -42 06 19.4375991   18.48 17.7 16.30   ~ 366 1
169 QSO B1445+101 QSO 14 45 16.46524525 +09 58 36.0728255   18.58 17.78     ~ 360 1
170 QSO B1445-161 QSO 14 48 15.05414424 -16 20 24.5488418   20.5 18.9 19.4   ~ 60 1
171 ICRF J145427.4-374733 Sy1 14 54 27.40975442 -37 47 33.1448724   16.36 16.69 16.14   ~ 156 1
172 QSO B1502+1041 QSO 15 04 24.97978142 +10 29 39.1986151   18.97 18.56 18.94   ~ 474 1
173 QSO B1504-167 QSO 15 07 04.78696071 -16 52 30.2670781   18.40 18.5 17.00   ~ 216 1
174 QSO B1508+572 QSO 15 10 02.92236464 +57 02 43.3759071   22.73 21.38 19.23   ~ 160 0
175 4C -05.64 QSO 15 10 53.59142086 -05 43 07.4173767   17.44 17.21     ~ 195 1
176 QSO J1512-0906 QSO 15 12 50.53292491 -09 05 59.8295878   16.74 16.54     ~ 1167 1
177 QSO B1514+197 BLL 15 16 56.79616342 +19 32 12.9920178 18.59 18.19 18.7 17.51   ~ 136 1
178 QSO B1514-24 BLL 15 17 41.8135246339 -24 22 19.482167214   15.13 14.00 13.95   ~ 656 3
179 QSO B1519-273 BLL 15 22 37.67598872 -27 30 10.7854174   18.72 18.5 17.42   ~ 260 1
180 QSO B1532+016 QSO 15 34 52.45368142 +01 31 04.2065916   19.0 18.5 18.58   ~ 172 2
181 QSO B1546+0246 QSO 15 49 29.43684301 +02 37 01.1634197   17.57 17.42 15.53   ~ 319 1
182 QSO B1555+001 QSO 15 57 51.43397128 -00 01 50.4137075   20.10 19.72 18.75   ~ 165 1
183 QSO J1559+0304 QSO 15 59 30.97261545 +03 04 48.2568829     19.8 19.77   ~ 63 1
184 7C 160012.00+333509.00 Bla 16 02 07.26346106 +33 26 53.0724368     23.0 23   ~ 114 1
185 QSO B1614+051 QSO 16 16 37.55681502 +04 59 32.7367495   19.60 19.17 19.49   ~ 176 2
186 QSO B1622-253 QSO 16 25 46.89164010 -25 27 38.3267989   21.3 20.6 19.60   ~ 305 1
187 4C 41.32 QSO 16 25 57.66971410 +41 34 40.6292986     22 21.73   ~ 156 1
188 QSO B1622-297 QSO 16 26 06.02083867 -29 51 26.9710860   18.41 20.5 17.6   ~ 367 0
189 NGC 6251 Sy2 16 32 31.96990024 +82 32 16.3999540 15.24 14.66 12.89 7.62   ~ 674 0
190 4C 38.41 QSO 16 35 15.492970280 +38 08 04.50062279   18.14 17.97 17.25   ~ 756 1
191 ICRF J163813.4+572023 Sy1 16 38 13.45629705 +57 20 23.9790727     17.0 16.94   ~ 315 1
192 6C 163852+395305 QSO 16 40 29.632771800 +39 46 46.02850331   18.4 16.5 18.75   ~ 276 2
193 4C 69.21 QSO 16 42 07.8485400 +68 56 39.756414   19.723   19.219   ~ 286 1
194 4C 39.49 BLL 16 53 52.21668494 +39 45 36.6089458 14.09 14.15 13.29 8.26   ~ 1938 2
195 QSO J1658+0515 QSO 16 58 33.4475275967 +05 15 16.444287791   17.00 16.54 16.21   ~ 208 1
196 QSO J1700-2610 QSO 17 00 53.15406129 -26 10 51.7253457   16.50       ~ 90 1
197 QSO B1705+0152 QSO 17 07 34.41527100 +01 48 45.6992837   18.5 18.9 18.52   ~ 93 1
198 ICRF J170934.3-172853 QSO 17 09 34.34539327 -17 28 53.3649724     17.5 20.90   ~ 40 1
199 7C 172601.30+453309.00 BLL 17 27 27.65080470 +45 30 39.7313444   19.0 19.0 16.64   ~ 169 1
200 ICRF J172824.9+042704 Sy1 17 28 24.95272422 +04 27 04.9139217   17.43 16.99 16.24   ~ 197 1
201 QSO B1730-130 QSO 17 33 02.70578476 -13 04 49.5481484   18 18.5 18.78 17.39 ~ 992 1
202 4C 51.37 QSO 17 40 36.9779934388 +52 11 43.411910710   18.16 18.5 16.73   ~ 363 1
203 QSO B1741-038 QSO 17 43 58.85613396 -03 50 04.6166450     18.5 17.98   ~ 481 1
204 6C 174400+554318 QSO 17 44 56.60706995 +55 42 17.1611150   13.0 13.5     ~ 70 1
205 QSO B1743+173 QSO 17 45 35.20817083 +17 20 01.4236878     19.0 18.21   ~ 65 1
206 8C 1745+624 QSO 17 46 14.03413721 +62 26 54.7383903   20.91 19.51     ~ 107 1
207 4C 09.57 BLL 17 51 32.81857318 +09 39 00.7284829   17.46 16.78 15.57   ~ 820 1
208 7C 175844.60+384828.00 QSO 18 00 24.76536125 +38 48 30.6975330   17.8 17.8 17.04   ~ 132 1
209 8C 1803+784 BLL 18 00 45.6831135718 +78 28 04.017792333   16.4 16.4 15.46   ~ 668 1
210 3C 371 BLL 18 06 50.6803567107 +69 49 28.108152993   14.77 14.22 11.39   ~ 801 2
211 ICRF J180957.8-455241 BLL 18 09 57.87175020 -45 52 41.0139197   16.89   15.06   ~ 50 1
212 ICRF J181945.3-552120 QSO 18 19 45.39951849 -55 21 20.7453785   19.19 16.0 21.50   ~ 63 1
213 4C 56.27 BLL 18 24 07.06837771 +56 51 01.4908371   18.9 18.4 16.48   ~ 441 1
214 ICRF J184916.0+670541 Sy1 18 49 16.07228978 +67 05 41.6802978     20 17.45   ~ 222 1
215 ICRF J185457.2+735119 Sy1 18 54 57.3000654656 +73 51 19.904978593     17.5 16.39   ~ 64 1
216 ICRF J190255.9+315941 Sy1 19 02 55.93889898 +31 59 41.7017097     17.5     ~ 259 2
217 QSO B1908-202 QSO 19 11 09.65289198 -20 06 55.1089891   18.21   18.14   ~ 239 0
218 [VV2006] J192332.2-210433 QSO 19 23 32.18981466 -21 04 33.3330547   15.32 17.50 16.70   ~ 127 2
219 QSO B1921-293 BLL 19 24 51.05595514 -29 14 30.1210524   18.71 18.21 15.07   ~ 704 0
220 ICRF J192559.6+210626 BLL 19 25 59.60535560 +21 06 26.1620442           ~ 178 1
221 4C 73.18 BLL 19 27 48.4944745594 +73 58 01.571908984     15.5 15.11   ~ 496 2
222 QSO B1933-400 QSO 19 37 16.21735166 -39 58 01.5529907   18.15 19 17.43   ~ 171 2
223 QSO B1937-1009 BLL 19 39 57.2569480405 -10 02 41.525657493   18.800 19.0 17.188   ~ 171 1
224 QSO B1935-692 QSO 19 40 25.5273425126 -69 07 56.972951491   18.36 18.8     ~ 103 1
225 QSO B1954+513 QSO 19 55 42.73826837 +51 31 48.5461210     18.5 17.34   ~ 217 1
226 QSO B1954-388 QSO 19 57 59.81927470 -38 45 06.3557585   18.47 17.07 16.73   ~ 186 1
227 QSO B1958-179 QSO 20 00 57.09044485 -17 48 57.6725440   18.02 17.46 15.33   ~ 224 1
228 QSO B2000-330 QSO 20 03 24.1165865443 -32 51 45.138893091   18.83 18.4 17.11   ~ 250 1
229 QSO B2029+121 BLL 20 31 54.99427114 +12 19 41.3403129     18.5 17.42   ~ 131 1
230 3C 418.0 QSO 20 38 37.0346600 +51 19 12.661988   21.30 20.00 18.9   ~ 275 0
231 QSO B2052-474 QSO 20 56 16.35981874 -47 14 47.6276461   18.29 19.1 18.07   ~ 263 1
232 QSO B2059+034 QSO 21 01 38.83416420 +03 41 31.3209577   18.13 17.78 17.68   ~ 151 1
233 QSO B2106-413 QSO 21 09 33.18859195 -41 10 20.6053191   20.20 21.0 20.41   ~ 99 1
234 QSO J2115+295 QSO 21 15 29.41345556 +29 33 38.3669657     19.5 19.26   ~ 143 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 44.51738 +05 35 22.0933   18.3 17.5 19.86   ~ 263 1
237 QSO B2128-123 BLL 21 31 35.26175 -12 07 04.7961   16.33 16.11 15.87   ~ 424 1
238 QSO B2136+1410 QSO 21 39 01.30926937 +14 23 35.9922096     18.5 18.22   ~ 234 1
239 ICRF J214622.9-152543 Sy1 21 46 22.97933395 -15 25 43.8856129   17.70 17.27 17.20   ~ 111 1
240 4C 06.69 QSO 21 48 05.4585565234 +06 57 38.605396596   16.85 16.47 15.06   ~ 602 1
241 ICRF J215137.8+055212 Sy1 21 51 37.87549312 +05 52 12.9545524   23.700 22.050 20.850   ~ 104 1
242 QSO B2149-306 QSO 21 51 55.52398143 -30 27 53.6979987   17.95 18.0 17.48   ~ 222 1
243 QSO B2150+173 BLL 21 52 24.81939953 +17 34 37.7950583     17.9 17.98   ~ 132 2
244 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 2026 1
245 4C 31.63 BLL 22 03 14.9758020 +31 45 38.269707   15.85 15.58 14.33   ~ 462 1
246 QSO B2204-54 QSO 22 07 43.7335704104 -53 46 33.822173951   18.45 18.0 18.20   ~ 137 1
247 QSO B2209+236 QSO 22 12 05.96631138 +23 55 40.5438272   19   19.69   ~ 193 1
248 4C -03.79 QSO 22 18 52.03772395 -03 35 36.8794566   16.93 16.38 16.15   ~ 317 1
249 3C 446 BLL 22 25 47.2593030 -04 57 01.390762   18.83 18.39 16.3   ~ 767 1
250 QSO B2227-0848 QSO 22 29 40.08434003 -08 32 54.4353948   17.80 17.41 17.81   ~ 302 1
251 4C 11.69 QSO 22 32 36.40890517 +11 43 50.9040717   17.75 17.33     ~ 988 2
252 QSO B2232-488 QSO 22 35 13.23657712 -48 35 58.7945006   17.61 17.2     ~ 115 1
253 6C 223524+730738 QSO 22 36 38.59702445 +73 22 52.6623019       19.90   ~ 36 1
254 QSO J2246-1206 QSO 22 46 18.2318680462 -12 06 51.276150444   16.63 16.45 15.99   ~ 263 1
255 QSO B2250+194 BLL 22 53 07.3693349625 +19 42 34.626608636   17.5 17.5 16.22   ~ 61 2
256 QSO B2253+417 QSO 22 55 36.70784831 +42 02 52.5326236     18.8     ~ 73 1
257 QSO B2254+0727 BLL 22 57 17.30312249 +07 43 12.3024770   17.07 16.36     ~ 287 1
258 ICRF J225805.9-275821 Sy1 22 58 05.96288481 -27 58 21.2567425   17.34 16.77 17.20   ~ 297 1
259 QSO J2320+0513 QSO 23 20 44.8565850 +05 13 49.952461   18.6 19.0     ~ 139 1
260 4C 27.50 QSO 23 21 59.86222742 +27 32 46.4436995   19 19.0 18.8   ~ 116 1
261 QSO B2320-035 QSO 23 23 31.95375451 -03 17 05.0237932   18.6   18.16   ~ 173 1
262 QSO B2326-477 QSO 23 29 17.7043017660 -47 30 19.117533633   16.93 16.79 16.30   ~ 166 1
263 QSO B2329-16 BLL 23 31 38.65244503 -15 56 57.0096852   20.72   20.65   ~ 117 1
264 QSO B2335-027 QSO 23 37 57.33907287 -02 30 57.6292276   18.1 19.27 18.97   ~ 105 1
265 QSO B2355-534 BLL 23 57 53.2659039839 -53 11 13.691995248   18.63 17.8 16.89   ~ 133 1
266 QSO J2358-1020 QSO 23 58 10.88240761 -10 20 08.6113211   19.16 18.91 18.00   ~ 120 0
267 QSO B2357+385 QSO 23 59 33.18079739 +38 50 42.3182943   19.0 18.0 19.1   ~ 50 1

    Equat.    Gal    SGal    Ecl

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2020.12.01-13:52:24

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