2005AJ....130.2529O

Query : 2005AJ....130.2529O

2005AJ....130.2529O - Astron. J., 130, 2529-2540 (2005/December-0)

VLBI observations of southern hemisphere ICRF sources. II. Astrometric suitability based on intrinsic structure.

OJHA R., FEY A.L., CHARLOT P., JAUNCEY D.L., JOHNSTON K.J., REYNOLDS J.E., TZIOUMIS A.K., QUICK J.F.H., NICOLSON G.D., ELLINGSEN S.P., McCULLOCH P.M. and KOYAMA Y.

Abstract (from CDS):

We present 8.4 GHz very long baseline interferometry (VLBI) observations of 48 southern hemisphere extragalactic sources from the International Celestial Reference Frame. These are the second in a series of observations intended to image all such sources in the southern hemisphere at milliarcsecond resolution and bring the total number of observed sources to 111. We use these data, together with previously published data, to quantify the magnitude of the expected effect of intrinsic source structure on astrometric bandwidth synthesis VLBI observations by calculating a ``structure index'' for the sources; the structure index yields an estimate of their astrometric quality. Approximately 35% of sources in our sample have a structure index indicative of compact or very compact structures. The remaining two-thirds of our sources are less compact and should probably be avoided in astrometric and geodetic VLBI experiments requiring the highest accuracy unless intrinsic source structure can be accounted for in the astrometric/geodetic analysis.

Abstract Copyright: ∼

Journal keyword(s): Astrometry - Galaxies: Active - Galaxies: Quasars: General - Radio Continuum: Galaxies - Reference Systems - Surveys

VizieR on-line data: <Available at CDS (J/AJ/130/2529): table3.dat table4.dat table5.dat>

Simbad objects: 45

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Number of rows : 45
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 QSO B0047-5754 Bla 00 49 59.4728345616 -57 38 27.339177408   17.49 18.5 16.56   ~ 144 1
2 QSO B0056-572 Bla 00 58 46.5813154752 -56 59 11.469154272   17.91   16.95   ~ 98 1
3 QSO B0220-349 Bla 02 22 56.40164366 -34 41 28.7302247   21.39   21.10   ~ 79 1
4 QSO B0252-549 Bla 02 53 29.1803201880 -54 41 51.437517216   17.65 19.3 16.79   ~ 141 1
5 QSO B0335-364 Bla 03 36 54.0235343784 -36 16 06.220332408   18.40 18 18.7   ~ 80 1
6 QSO B0400-319 Bla 04 02 21.26599921 -31 47 25.9455847   20.2   20.75   ~ 111 1
7 QSO J0403-3605 Bla 04 03 53.74990003 -36 05 01.9131880   17.04 17.17 16.67   ~ 313 1
8 QSO B0405-385 Bla 04 06 59.03533781 -38 26 28.0423651   19.55 18.0     ~ 250 2
9 QSO B0454-810 Bla 04 50 05.44021015 -81 01 02.2314265   19.31 19.2 18.30   ~ 125 1
10 QSO B0522-611 Bla 05 22 34.42547703 -61 07 57.1337711   18.46 18.05 18.05   ~ 96 1
11 ICRF J052930.0-724528 QSO 05 29 30.04217573 -72 45 28.5075004   19.61       ~ 102 1
12 QSO B0738-674 Bla 07 38 56.49624352 -67 35 50.8260320     19.8 20.00   ~ 56 1
13 QSO J0743-6726 Bla 07 43 31.6117092000 -67 26 25.547011008   16.71 16.37     ~ 149 1
14 ICRF J081108.8-492943 QSO 08 11 08.80318 -49 29 43.5101   21.57       ~ 29 1
15 QSO B0826-373 QSO 08 28 04.78023133 -37 31 06.2815112   16       ~ 63 1
16 ICRF J084127.0-754027 Sy1 08 41 27.0356601864 -75 40 27.874130880   18.03 18.9     ~ 61 1
17 QSO B0920-397 Bla 09 22 46.41826886 -39 59 35.0682386   18.12 18.8     ~ 143 1
18 QSO B0925-2021 Bla 09 27 51.82432394 -20 34 51.2325545   16.59 16.40 16.00   ~ 181 2
19 QSO J1051-3138 Bla 10 51 04.77754627 -31 38 14.3076867   18.5 19.4 19   ~ 61 1
20 QSO B1057-797 BLL 10 58 43.30979475 -80 03 54.1598058   19.08   17.31   ~ 211 1
21 CTS 10 Bla 11 03 31.5264793968 -32 51 16.694017200   16.29 16.30 16.4   ~ 117 1
22 QSO B1105-680 QSO 11 07 12.6951269832 -68 20 50.728576056   18.47 18.4     ~ 51 1
23 QSO B1237-101 Bla 12 39 43.06148047 -10 23 28.6925910   18.08 18.11 17.14   ~ 146 1
24 QSO B1251-713 QSO 12 54 59.92148599 -71 38 18.4366378   20.55       ~ 54 1
25 QSO B1352-104 Bla 13 54 46.51868700 -10 41 02.6561979   18.20 18.4     ~ 175 1
26 QSO B1435-218 Bla 14 38 09.46940207 -22 04 54.7484420   18.75   17.30   ~ 76 1
27 4C -05.64 Bla 15 10 53.59142427 -05 43 07.4175000   17.44 17.21     ~ 249 1
28 QSO B1519-273 BLL 15 22 37.67599511 -27 30 10.7855131   18.72 18.5 17.42   ~ 313 1
29 PKS 1541-82 rG 15 50 59.14243274 -82 58 06.8453573   20.00       ~ 36 1
30 QSO B1549-790 Bla 15 56 58.86979525 -79 14 04.2817241   18.80 18.800 17.84   ~ 221 1
31 ICRF J160734.7-333108 QSO 16 07 34.76234762 -33 31 08.9134699   20.5       ~ 39 1
32 QSO B1610-771 Bla 16 17 49.27644414 -77 17 18.4675417   19.19 19.0 17.32   ~ 172 1
33 QSO B1908-202 Bla 19 11 09.65289294 -20 06 55.1090664   18.21   18.14   ~ 306 1
34 QSO B1903-802 Bla 19 12 40.01907746 -80 10 05.9464844   19.83 19.0 19.54   ~ 89 1
35 QSO B2000-330 Bla 20 03 24.1161711720 -32 51 45.136882080   18.83 18.4 17.11   ~ 279 1
36 PKS J2009-4849 BLL 20 09 25.3903899240 -48 49 53.725051056   15.75 12.81 11.41   ~ 604 1
37 QSO B2054-377 Bla 20 57 41.60347994 -37 34 02.9903495   20.69 17.5 19.35   ~ 50 1
38 QSO B2059-786 QSO 21 05 44.96140361 -78 25 34.5469664   21.59 21 20.20   ~ 43 1
39 ICRF J211630.8-805355 QSO 21 16 30.84565873 -80 53 55.2229061   20   19.50   ~ 39 1
40 QSO B2149-306 Bla 21 51 55.52396937 -30 27 53.6980880   17.95 18.0 17.48   ~ 281 1
41 PKS 2211-388 rG 22 14 38.56966 -38 35 45.0098           ~ 34 1
42 QSO B2227-399 Bla 22 30 40.2789257160 -39 42 52.066612080   17.87 18.5 15.73   ~ 102 1
43 QSO B2245-328 Bla 22 48 38.68573790 -32 35 52.1881477   18.38 18.6 18.63   ~ 132 1
44 QSO B2259-37 QSO 23 02 23.88821211 -37 18 06.8319752           ~ 48 1
45 AT20G J230305-303011 Q? 23 03 05.82082499 -30 30 11.4734219     16     ~ 22 1

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