2011A&A...526A.102B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST15:08:55

2011A&A...526A.102B - Astronomy and Astrophysics, volume 526A, 102-102 (2011/2-1)

VLBI observations of optically-bright extragalactic radio sources for the alignment of the radio frame with the future Gaia frame. II. Imaging candidate sources.

BOURDA G., COLLIOUD A., CHARLOT P., PORCAS R. and GARRINGTON S.

Abstract (from CDS):

The European space astrometry mission Gaia, to be launched by 2012, will construct a dense optical QSO-based celestial reference frame which will need to be linked to the International Celestial Reference Frame (ICRF; the IAU fundamental frame), with the highest accuracy. However, it has been found that only 10% of the ICRF sources (70 sources) are suitable to establish this link. The remaining sources are not useful either because they are not bright enough at optical wavelengths or because they have significant extended radio emission which precludes reaching the highest astrometric accuracy. In order to improve the accuracy of this alignment, we have developed a program of VLBI observations based on three steps to detect, image and measure astrometric positions of weak extragalactic radio sources, with bright optical counterparts, from a sample of 447 candidate sources.The experiments devoted to VLBI detection, carried out with the European VLBI Network (EVN) in June and October 2007, were very successful, with 398 sources detected at both S- and X-bands. From these, 105 sources were observed in March 2008 with a global VLBI array (EVN and VLBA; Very Long Baseline Array) for imaging their VLBI structures.All sources were successfully imaged in both bands and about 50% (47 sources) were found to be point-like on VLBI scales. These images are available at http://www.obs.u-bordeaux1.fr/BVID/GC030/. VLBI positions of these sources will be measured accurately in future astrometric experiments.

Abstract Copyright:

Journal keyword(s): reference systems - quasars: general - astrometry - catalogs - methods: observational - techniques: interferometric

VizieR on-line data: <Available at CDS (J/A+A/526/A102): table3.dat>

Simbad objects: 105

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Number of rows : 105

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 [VV98] J000623.1+123553 QSO 00 06 23.0559945680 +12 35 53.101854367     17.40     ~ 22 1
2 LBQS 0049+0019A QSO 00 52 05.56900 +00 35 38.1461   16.54 16.22     ~ 39 1
3 LBQS 0107-0235 QSO 01 10 13.1605010207 -02 19 52.838365692   18.39 17.80 17.61   ~ 72 1
4 QSO B0109+2004 QSO 01 12 10.1907458066 +20 20 21.764710091     17 16.8   ~ 46 1
5 [VV2006] J013241.1-080406 BLL 01 32 41.1266872881 -08 04 04.840585508   17.51 16.50 15.86   ~ 26 0
6 QSO B0145+210 QSO 01 47 53.8224406945 +21 15 39.731698828     17.5     ~ 15 1
7 2MASX J01523964+0147167 BLL 01 52 39.6108342199 +01 47 17.385034188     15.12 11.8   ~ 106 1
8 ICRF J021417.9+514451 BLL 02 14 17.9395168799 +51 44 51.945994377     16.50 16.5   ~ 78 1
9 [VV96] J044921.1+072910 QSO 04 49 21.1702317756 +07 29 10.697131328   16.9 16.90     ~ 13 1
10 2FGL J0505.4+0419 BLL 05 05 34.7705065552 +04 15 54.574479647 18.07 17.80 17.56 16.8   ~ 53 1
11 2MASX J05222318-0725133 Sy1 05 22 23.1963326249 -07 25 13.482411225   17.37 16.50 16.25   ~ 24 0
12 7C 065109.30+425147.00 BLL 06 54 43.5257637658 +42 47 58.737662093     17.00 14.9   ~ 41 1
13 4C 42.22 BLL 06 56 10.66212 +42 37 02.7510   15.0 16.90 11.1   ~ 55 1
14 [VV98] J071436.2+740811 QSO 07 14 36.1252076135 +74 08 10.143846210     17.10     ~ 26 1
15 [VV98] J074451.2+292008 QSO 07 44 51.3640718405 +29 20 06.041952128   17.20 16.97 16.4   ~ 45 1
16 QSO J0754+3033 QSO 07 54 48.8510946198 +30 33 55.025208525   17.88 17.64 18.06   ~ 52 1
17 2MASX J08013199+4736155 Sy1 08 01 31.9657431118 +47 36 16.061073512   16.51 16.29     ~ 53 1
18 7C 080625.30+350445.00 BLL 08 09 38.8884303300 +34 55 37.233342231   18.38 17.42 12.6   ~ 77 1
19 [VV98] J081041.2+081001 QSO 08 10 41.36640 +08 10 00.3104     16.60     ~ 9 0
20 QSO J0821+3107 QSO 08 21 07.6134292339 +31 07 51.149469850   17.59 17.28     ~ 56 1
21 7C 082118.00+410654.00 QSO 08 24 39.0016315735 +40 57 07.764192824   17.50 17.30     ~ 29 1
22 [VV2006] J084153.9+231955 QSO 08 41 54.0560754580 +23 19 54.745506096   17.2 17.57 17.5   ~ 24 2
23 7C 083849.60+453626.00 QSO 08 42 15.3516827123 +45 25 44.184952131   18.16 17.70 16.5   ~ 48 1
24 QSO B0850.2+2825 QSO 08 53 17.8285403826 +28 13 50.000209957   18.61 18.32 17.5   ~ 45 1
25 QSO J0857+3313 QSO 08 57 26.95320 +33 13 17.1478   18.51 18.25     ~ 19 1
26 7C 090323.89+500501.00 QSO 09 06 51.50586 +49 52 35.9491   21.63 21.31 20.80   ~ 16 1
27 Ton 1015 BLL 09 10 37.0355795817 +33 29 24.419639489   16.19 15.71 15.9   ~ 67 2
28 2FGL J0953.1-0839 BLL 09 53 02.7096407675 -08 40 18.364545620 16.99 16.73 16.69 17.4   ~ 51 0
29 6C 095030+323834 QSO 09 53 27.9563704482 +32 25 51.520435869     17.74 16.34   ~ 48 1
30 Ton 1125 QSO 09 55 37.9394238209 +33 35 03.935732483     17 16.72   ~ 48 1
31 7C 100726.39+713928.00 QSO 10 11 32.6182650530 +71 24 41.592166164     17.1     ~ 20 1
32 7C 100917.60+332417.00 QSO 10 12 11.4538637173 +33 09 26.454436672     17.5     ~ 39 1
33 87GB 100936.6+064517 BLL 10 12 13.3482894426 +06 30 57.201658317   17.72 17.39 16.9   ~ 68 1
34 [VV2000] J101302.3+352605 QSO 10 13 02.3016659964 +35 26 05.710036410   18.20 17.94     ~ 33 1
35 7C 102035.29+291154.00 QSO 10 23 24.04612 +28 56 50.9879     17.30 20.57   ~ 26 1
36 7C 102810.00+311824.00 BLL 10 30 59.0937266368 +31 02 55.722180791   17.07 16.71 16.1   ~ 168 1
37 Ton 1245 QSO 10 35 10.9913216274 +35 10 19.651751948   18.21 18.01     ~ 29 1
38 87GB 103431.3+572750 BLL 10 37 44.3078863654 +57 11 55.629763116   17.05 16.54 16.7   ~ 86 1
39 [VV2000] J104318.4-055349 QSO 10 43 18.9440284275 -05 53 52.540462513     16.90     ~ 14 0
40 [VV2006] J110424.1+073053 BLL 11 04 24.0715541863 +07 30 53.186716193   17.69 17.32     ~ 40 1
41 7C 1126+2342 QSO 11 28 51.6942325291 +23 26 17.364083968     17.80     ~ 17 1
42 QSO B1127+078 QSO 11 30 17.3818957026 +07 32 13.029493793   17.92 17.70     ~ 29 0
43 [VV2006] J113125.5+512857 QSO 11 31 25.4896112406 +51 28 57.452241869   17.76 17.60     ~ 22 0
44 [VV2006] J114306.0+184342 QSO 11 43 06.0286386169 +18 43 42.871968161   17.21 17.13 16.9   ~ 28 1
45 [VV2000] J114337.9+231502 QSO 11 43 37.8968793873 +23 15 02.443812871   18.30 18.08     ~ 22 0
46 6C 114541+320944 QSO 11 48 18.8795988732 +31 54 10.018515609   17.38 17.28     ~ 40 1
47 8C 1148+592 BLL 11 51 24.6602970912 +58 59 17.564898795   16.53 16.09 16.3   ~ 64 1
48 [VV98] J120335.4+451049 QSO 12 03 35.3954529580 +45 10 49.563516547   18.26 17.91 17.4   ~ 42 1
49 2MASX J12041665-0710086 BLL 12 04 16.6654488912 -07 10 09.009403453   18.01 18.00 14.6   ~ 56 0
50 7C 121240.29+464355.00 QSO 12 15 09.9422873491 +46 27 15.108292547   17.86 17.72 16.7   ~ 47 1
51 QSO B1228+077 QSO 12 31 20.5615478137 +07 25 52.640937700   17.58 17.59     ~ 59 0
52 Ton 116 BLL 12 43 12.7360876322 +36 27 43.998968007   17.41 17.11 16.4   ~ 76 1
53 [VV2006] J124510.0+570954 BLL 12 45 10.0003122020 +57 09 54.373135807   18.33 17.96     ~ 43 1
54 7C 130709.80+432102.00 BLL 13 09 25.5263829164 +43 05 05.573962988   17.65 17.13     ~ 56 1
55 6C 130956+482534 QSO 13 12 11.1374685113 +48 09 25.257444638   17.65 17.49 17.5   ~ 43 1
56 7C 131027.80+312858.00 QSO 13 12 48.7973655876 +31 13 00.597965932   18.60 18.32 17.85   ~ 34 1
57 7C 1312+2404 BLL 13 14 43.8061207007 +23 48 26.784058893 17.15 16.83 16.57 15.4   ~ 55 1
58 [VV2006] J131659.0+722621 QSO 13 16 59.0410996317 +72 26 20.851784346     17.47     ~ 5 0
59 LBQS 1319+0039 QSO 13 21 39.5656501310 +00 23 57.640359768   18.12 17.86     ~ 46 1
60 [VV2006] J134042.0+300834 QSO 13 40 41.9881517547 +30 08 34.820938581   20.37 20.42     ~ 12 1
61 2E 3129 Sy1 13 43 00.1797233419 +28 44 07.508257363   17.54 17.07 16.5   ~ 83 1
62 7C 134515.19+733554.00 BLL 13 46 08.4747358516 +73 20 53.298953268     17.4     ~ 26 1
63 7C 141112.69+743829.00 BLL 14 11 34.6590803447 +74 24 29.724411252     17.35 17   ~ 17 1
64 [VV2006] J142242.5+041439 QSO 14 22 42.4904268145 +04 14 39.117001951   18.04 17.69     ~ 35 1
65 2MASSI J1431258+244220 Sy1 14 31 25.8845083619 +24 42 20.704368998   17.74 17.65     ~ 32 0
66 QSO B1518+162 QSO 15 20 37.0608783362 +16 01 26.629983417     17.5     ~ 21 1
67 6C 152056+723546 QSO 15 20 47.6399145897 +72 25 05.575284864     16.50     ~ 26 1
68 7C 152226.19+665539.00 QSO 15 22 58.9416514225 +66 45 06.738598330   18.86 18.64     ~ 13 1
69 [VV2006] J153714.5+230040 QSO 15 37 14.50087 +23 00 40.5110   19.32 19.20     ~ 17 0
70 QSO B1556+335 QSO 15 58 55.1864547958 +33 23 18.607516553   18.22 17.79 17.6   ~ 94 1
71 7C 160323.39+695408.00 QSO 16 03 18.6214913119 +69 45 57.441607080     17.12     ~ 15 1
72 [VV98] J160820.5+601828 BLL 16 08 20.54236 +60 18 28.1993     16.00 15.9   ~ 22 0
73 QSO B1607+1819 QSO 16 10 05.2857490387 +18 11 43.416238738     18.5     ~ 42 1
74 [VV2000] J161447.0+374607 QSO 16 14 46.9581157053 +37 46 07.280187635   17.35 16.98 16.8   ~ 40 1
75 7C 161829.80+530315.00 QSO 16 19 42.3889179390 +52 56 13.394790991   17.01 16.72 16.2   ~ 23 1
76 7C 164828.69+414532.00 BLL 16 50 05.4798187410 +41 40 32.424909717   17.92 17.87 16.6   ~ 49 1
77 [VV98] J165543.6+194847 QSO 16 55 43.5683908105 +19 48 47.121478491     16.60     ~ 19 1
78 [VV2000] J171653.7+230553 QSO 17 16 53.6563489441 +23 05 53.318358509     18.00     ~ 9 1
79 [VV2006] J171719.2+422658 QSO 17 17 19.20955 +42 26 59.8437     16.00 12.8   ~ 37 1
80 ICRF J172320.7+341757 Sy1 17 23 20.7958592865 +34 17 57.966961854   15.58 15.46     ~ 281 1
81 QSO B1722+119 BLL 17 25 04.34087 +11 52 15.4688   16.29 15.77 14.45   ~ 164 1
82 7C 172903.70+371707.00 BLL 17 30 47.0448044998 +37 14 55.123862083   17.18 17.18 16.4   ~ 37 1
83 [VV2006] J173052.7+602517 QSO 17 30 52.7132464598 +60 25 16.726009695   18.16 17.94     ~ 29 0
84 2MASX J17412290+7224518 BLL 17 41 22.8608073335 +72 24 51.962547337     17.46 15.8   ~ 14 1
85 2MASX J17423197+5945065 BLL 17 42 32.0005041783 +59 45 06.732843996   17.74 17.14 16.7   ~ 62 1
86 7C 175322.39+335119.00 Sy1 17 55 11.2443174182 +33 50 59.801116881     17.90     ~ 16 1
87 QSO B1759+7539 QSO 17 57 46.3591958319 +75 39 16.182864362     16.50     ~ 79 0
88 [VV2006] J181157.1+521427 QSO 18 11 57.0796211364 +52 14 26.754016623     17.09     ~ 7 0
89 7C 181142.79+314318.00 BLL 18 13 35.2028793055 +31 44 17.620197311     17.4 15.2   ~ 71 1
90 [VV2006] J181910.1+551109 QSO 18 19 10.0850685789 +55 11 08.551732427     17.03     ~ 7 0
91 [VV2006] J183412.2+205140 QSO 18 34 12.14333 +20 51 40.8370     16.80     ~ 7 0
92 [VV98] J183558.5+250645 QSO 18 35 58.3753383848 +25 06 45.407831212     17.20 15.93   ~ 19 1
93 2MASS J18385855+5735392 BLL 18 38 58.5598203352 +57 35 39.267071820     16.93 15.4   ~ 15 1
94 2MAXI J2042+751 Sy1 20 42 37.3081453418 +75 08 02.444858560     14.46 13.80   ~ 210 0
95 [VV98] J205429.6+240734 QSO 20 54 29.53301 +24 07 33.7664     16.50     ~ 12 1
96 [VV98] J210004.9+234703 QSO 21 00 04.8341210583 +23 47 03.418443512     17.00     ~ 12 1
97 6C 211108+800844 Sy1 21 09 19.1613325762 +80 21 11.224981522     17.90     ~ 18 1
98 QSO B2116+203 QSO 21 18 34.7292494239 +20 34 02.076558512     17.0     ~ 17 0
99 [VV98] J213029.8+333248 QSO 21 30 29.7009818518 +33 32 49.052221145     17.90     ~ 10 0
100 87GB 224130.7+200514 BLL 22 43 54.7434952027 +20 21 03.773522952     16.00 16.1   ~ 70 0
101 2MASX J22500577+3824371 BLL 22 50 05.7480525271 +38 24 37.195160708     16.00 14.8   ~ 97 1
102 QSO B2300+345 QSO 23 03 21.6264288262 +34 46 48.474611620     18.00     ~ 10 1
103 QSO B2314+160 QSO 23 16 39.6981216885 +16 18 06.744722697     17.70     ~ 24 0
104 [VV2006] J231834.0+240440 QSO 23 18 33.9676436339 +24 04 39.748126360     17.20     ~ 15 1
105 87GB 232252.5+394057 BLL 23 25 17.8704120896 +39 57 36.514040778   17.8 17.80 17.8   ~ 58 1

    Equat.    Gal    SGal    Ecl

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2020.07.04-15:08:56

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