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


Query : 2011A&A...526A.102B

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 - 2022
#notes
1 [VV98] J000623.1+123553 QSO 00 06 23.0559898776 +12 35 53.097769860     17.40     ~ 28 1
2 LBQS 0049+0019A QSO 00 52 05.5690063368 +00 35 38.149368180   16.54 16.22     ~ 43 1
3 LBQS 0107-0235 QSO 01 10 13.1603515272 -02 19 52.838715144   18.39 17.80 17.61   ~ 82 1
4 QSO B0109+2004 QSO 01 12 10.1908105872 +20 20 21.765069636     17 16.8   ~ 51 1
5 [VV2006] J013241.1-080406 BLL 01 32 41.1259581192 -08 04 04.837806948   17.51 16.50 15.86   ~ 37 0
6 QSO B0145+210 QSO 01 47 53.8228054968 +21 15 39.727809180     17.5     ~ 17 1
7 LEDA 174300 BLL 01 52 39.6109440384 +01 47 17.385104112     15.12 11.8   ~ 120 1
8 ICRF J021417.9+514451 BLL 02 14 17.9358553848 +51 44 51.945795816     16.50 16.5   ~ 94 1
9 [VV96] J044921.1+072910 QSO 04 49 21.1706414880 +07 29 10.696519500   16.9 16.90     ~ 15 1
10 2FGL J0505.4+0419 BLL 05 05 34.7693853576 +04 15 54.577536876 18.07 17.80 17.56 16.8   ~ 63 1
11 2MASX J05222318-0725133 Sy1 05 22 23.1966340224 -07 25 13.479749292   17.37 16.50 16.25   ~ 25 0
12 7C 065109.30+425147.00 BLL 06 54 43.5253496568 +42 47 58.730753904     17.00 14.9   ~ 42 1
13 4C 42.22 BLL 06 56 10.6619011872 +42 37 02.759080584   15.0 16.90 11.1   ~ 64 1
14 [VV98] J071436.2+740811 QSO 07 14 36.1251036096 +74 08 10.146305688     17.10     ~ 34 1
15 [VV98] J074451.2+292008 QSO 07 44 51.3643230792 +29 20 06.038217348   17.20 16.97 16.4   ~ 50 1
16 QSO J0754+3033 QSO 07 54 48.8512968792 +30 33 55.024909740   17.88 17.64 18.06   ~ 55 1
17 ATO J120.3831+47.6044 Sy1 08 01 31.9656875184 +47 36 16.062127020   16.51 16.29     ~ 61 1
18 7C 080625.30+350445.00 BLL 08 09 38.8872832824 +34 55 37.248843504   18.38 17.42 12.6   ~ 86 1
19 [VV98] J081041.2+081001 QSO 08 10 41.3659549176 +08 10 00.315084396   17.5 16.60     ~ 15 1
20 QSO J0821+3107 BLL 08 21 07.6135883448 +31 07 51.147374376   17.59 17.28     ~ 64 1
21 7C 082118.00+410654.00 QSO 08 24 39.0021683784 +40 57 07.763259960   17.50 17.30     ~ 33 1
22 [VV2006] J084153.9+231955 QSO 08 41 54.0565256832 +23 19 54.742181124   17.2 17.57 17.5   ~ 27 2
23 7C 083849.60+453626.00 QSO 08 42 15.3516545208 +45 25 44.182186752   18.16 17.70 16.5   ~ 54 1
24 QSO B0850.2+2825 QSO 08 53 17.8287531816 +28 13 49.996624692   18.61 18.32 17.5   ~ 51 1
25 QSO J0857+3313 QSO 08 57 26.95320 +33 13 17.1478   18.51 18.25     ~ 25 1
26 7C 090323.89+500501.00 QSO 09 06 51.50586 +49 52 35.9491   21.63 21.31 20.80   ~ 19 1
27 Ton 1015 BLL 09 10 37.0353299208 +33 29 24.418940568   16.19 15.71 15.9   ~ 79 2
28 ATO J148.2612-08.6717 BLL 09 53 02.7095643576 -08 40 18.360856776 16.99 16.73 16.69 17.4   ~ 63 0
29 6C 095030+323834 QSO 09 53 27.9566471448 +32 25 51.520311120     17.74 16.34   ~ 55 1
30 Ton 1125 QSO 09 55 37.9390883544 +33 35 03.940465164     17 16.72   ~ 57 1
31 4C 71.09 QSO 10 11 32.6184472200 +71 24 41.593771584     17.1     ~ 21 1
32 7C 1009+3324 QSO 10 12 11.4535955904 +33 09 26.452364796     17.5     ~ 45 1
33 ATO J153.0556+06.5158 BLL 10 12 13.3484443872 +06 30 57.192683436   17.72 17.39 16.9   ~ 79 1
34 [VV2000] J101302.3+352605 QSO 10 13 02.3011197816 +35 26 05.706982428   18.20 17.94     ~ 37 1
35 7C 102035.29+291154.00 QSO 10 23 24.0470148912 +28 56 50.986853628     17.30 20.57   ~ 26 1
36 7C 1028+3118 BLL 10 30 59.0936990784 +31 02 55.723145964   17.07 16.71 16.1   ~ 175 1
37 Ton 1245 QSO 10 35 10.9912113312 +35 10 19.648536384   18.21 18.01     ~ 33 1
38 87GB 103431.3+572750 BLL 10 37 44.3078432736 +57 11 55.629345156   17.05 16.54 16.7   ~ 101 1
39 [VV2000] J104318.4-055349 QSO 10 43 18.9436869504 -05 53 52.538000712     16.90     ~ 14 0
40 [VV2006] J110424.1+073053 BLL 11 04 24.0713906136 +07 30 53.182155384   17.69 17.32     ~ 49 1
41 7C 1126+2342 QSO 11 28 51.6948895128 +23 26 17.349546084     17.80     ~ 21 1
42 QSO B1127+078 QSO 11 30 17.3821660536 +07 32 13.029808812   17.92 17.70     ~ 36 0
43 [VV2006] J113125.5+512857 QSO 11 31 25.4891769504 +51 28 57.448219764   17.76 17.60     ~ 28 0
44 [VV2006] J114306.0+184342 QSO 11 43 06.0287744688 +18 43 42.875710896   17.21 17.13 16.9   ~ 32 1
45 [VV2000] J114337.9+231502 QSO 11 43 37.8972937272 +23 15 02.445270516   18.30 18.08     ~ 24 0
46 7C 1145+3211 QSO 11 48 18.8798813232 +31 54 10.016997660   17.38 17.28     ~ 43 1
47 8C 1148+592 BLL 11 51 24.6603608736 +58 59 17.566414656   16.53 16.09 16.3   ~ 72 1
48 [VV98] J120335.4+451049 QSO 12 03 35.3956118304 +45 10 49.565300952   18.26 17.91 17.4   ~ 46 1
49 2MASX J12041665-0710086 BLL 12 04 16.6649997552 -07 10 09.006821616   18.01 18.00 14.6   ~ 65 0
50 6C 121240+464354 QSO 12 15 09.9422143704 +46 27 15.107100912   17.86 17.72 16.7   ~ 51 1
51 QSO B1228+077 QSO 12 31 20.5617745320 +07 25 52.635019800   17.58 17.59     ~ 63 0
52 Ton 116 BLL 12 43 12.7362011736 +36 27 43.997592204   17.41 17.11 16.4   ~ 92 1
53 [VV2006] J124510.0+570954 BLL 12 45 09.9995503080 +57 09 54.373550040   18.33 17.96     ~ 51 1
54 7C 130709.80+432102.00 BLL 13 09 25.5263659608 +43 05 05.576817300   17.65 17.13     ~ 68 1
55 6C 130956+482534 QSO 13 12 11.1374338728 +48 09 25.261585236   17.65 17.49 17.5   ~ 48 1
56 7C 1310+3128 QSO 13 12 48.7976595912 +31 13 00.590064888   18.60 18.32 17.85   ~ 38 1
57 7C 1312+2404 BLL 13 14 43.8062104200 +23 48 26.782554060 17.15 16.83 16.57 15.4   ~ 68 1
58 [VV2006] J131659.0+722621 QSO 13 16 59.0404622784 +72 26 20.851089648     17.47     ~ 5 0
59 LBQS 1319+0039 QSO 13 21 39.5660125128 +00 23 57.638538564   18.12 17.86     ~ 48 1
60 [VV2006] J134042.0+300834 QSO 13 40 41.9858220936 +30 08 34.820203056   20.37 20.42     ~ 16 1
61 SDSS J134300.17+284407.5 Sy1 13 43 00.1795834440 +28 44 07.508553540   17.54 17.07 16.5   ~ 88 1
62 8C 1345+735 BLL 13 46 08.4750511056 +73 20 53.297225448     17.4     ~ 30 1
63 7C 141112.69+743829.00 BLL 14 11 34.6581400176 +74 24 29.726607564     17.35 17   ~ 19 1
64 [VV2006] J142242.5+041439 QSO 14 22 42.4905131280 +04 14 39.121993824   18.04 17.69     ~ 42 1
65 2MASS J14312586+2442203 Sy1 14 31 25.8850030680 +24 42 20.705101380   17.74 17.65     ~ 38 0
66 QSO B1518+162 QSO 15 20 37.0611260640 +16 01 26.631499224     17.5     ~ 25 1
67 4C 72.20 QSO 15 20 47.6407236816 +72 25 05.570234364     16.50     ~ 28 1
68 4C 66.16 QSO 15 22 58.9407507456 +66 45 06.742721016   18.86 18.64     ~ 15 1
69 [VV2006] J153714.5+230040 QSO 15 37 14.5007177808 +23 00 40.509810576   19.32 19.20     ~ 22 1
70 QSO B1556+335 QSO 15 58 55.1864381376 +33 23 18.608916984   18.22 17.79 17.6   ~ 99 1
71 7C 1603+6954 QSO 16 03 18.6214571448 +69 45 57.441631248     17.12     ~ 17 1
72 [VV98] J160820.5+601828 BLL 16 08 20.5424263152 +60 18 28.200689748     16.00 15.9   ~ 25 0
73 QSO B1607+1819 QSO 16 10 05.2857949488 +18 11 43.422501444     18.5     ~ 49 1
74 [VV2000] J161447.0+374607 QSO 16 14 46.9582157544 +37 46 07.280229756   17.35 16.98 16.8   ~ 44 1
75 7C 161829.80+530315.00 BLL 16 19 42.3887715600 +52 56 13.395126444   17.01 16.72 16.2   ~ 29 1
76 6C 164828+414547 BLL 16 50 05.4800343792 +41 40 32.424922992   17.92 17.87 16.6   ~ 52 1
77 [VV98] J165543.6+194847 QSO 16 55 43.5675547824 +19 48 47.110433940     16.60     ~ 23 1
78 [VV2000] J171653.7+230553 QSO 17 16 53.6563012440 +23 05 53.319119784     18.00     ~ 11 1
79 [VV2006] J171719.2+422658 QSO 17 17 19.20955 +42 26 59.8437     16.00 12.8   ~ 41 1
80 ICRF J172320.7+341757 Sy1 17 23 20.7958610952 +34 17 57.967381860   15.58 15.46     ~ 291 1
81 QSO B1722+119 BLL 17 25 04.3409350008 +11 52 15.471967296   16.29 15.77 14.45   ~ 185 1
82 7C 172903.70+371707.00 BLL 17 30 47.0446006992 +37 14 55.130332344   17.18 17.18 16.4   ~ 44 1
83 [VV2006] J173052.7+602517 BLL 17 30 52.7128612584 +60 25 16.728022236   18.16 17.94     ~ 33 0
84 2MASX J17412290+7224518 BLL 17 41 22.8570128256 +72 24 51.966422892     17.46 15.8   ~ 17 1
85 2MASX J17423197+5945065 BLL 17 42 31.9998615600 +59 45 06.731291412   17.74 17.14 16.7   ~ 69 1
86 7C 175322.39+335119.00 Sy1 17 55 11.2449425424 +33 50 59.788545756     17.90     ~ 16 1
87 QSO B1759+7539 BLL 17 57 46.3590423768 +75 39 16.181909928     16.50     ~ 84 0
88 [VV2006] J181157.1+521427 QSO 18 11 57.0792235104 +52 14 26.755115460     17.09     ~ 7 0
89 7C 181142.79+314318.00 BLL 18 13 35.2028439312 +31 44 17.620234836     17.4 15.2   ~ 88 1
90 [VV2006] J181910.1+551109 QSO 18 19 10.0857517320 +55 11 08.553214248     17.03     ~ 9 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 58.3753445832 +25 06 45.407309256     17.20 15.93   ~ 20 1
93 2MASX J18385847+5735395 BLL 18 38 58.5619131144 +57 35 39.281717976     16.93 15.4   ~ 17 1
94 4C 74.26 Sy1 20 42 37.3079247456 +75 08 02.445851940     14.46 13.80   ~ 229 0
95 [VV98] J205429.6+240734 QSO 20 54 29.5341486768 +24 07 33.779080344     16.50     ~ 14 1
96 [VV98] J210004.9+234703 QSO 21 00 04.8343343592 +23 47 03.408002268     17.00     ~ 13 1
97 8C 2111+801 Sy1 21 09 19.1629218840 +80 21 11.223777744     17.90     ~ 19 1
98 QSO B2116+203 QSO 21 18 34.7295117792 +20 34 02.077739760     17.0     ~ 19 0
99 [VV98] J213029.8+333248 QSO 21 30 29.7011317872 +33 32 49.044759036     17.90     ~ 11 0
100 87GB 224130.7+200514 BLL 22 43 54.7436079792 +20 21 03.775386276     16.00 16.1   ~ 81 0
101 2MASX J22500577+3824371 BLL 22 50 05.7481607616 +38 24 37.193100984     16.00 14.8   ~ 108 1
102 QSO B2300+345 QSO 23 03 21.6268172160 +34 46 48.479301480     18.00     ~ 11 1
103 QSO B2314+160 QSO 23 16 39.6980940840 +16 18 06.745072248     17.70     ~ 27 0
104 BWE 2316+2347 QSO 23 18 33.9675646440 +24 04 39.749125296     17.20     ~ 20 1
105 3FHL J2325.2+3957 BLL 23 25 17.8701567192 +39 57 36.512873352   17.8 17.80 17.8   ~ 63 1

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2022.08.15-09:17:18

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