1997A&AS..122..441C

Query : 1997A&AS..122..441C

1997A&AS..122..441C - Astron. Astrophys., Suppl. Ser., 122, 441-445 (1997/May-1)

Optical astrometry of Benchmark radio sources. IV. New results in the southern hemisphere.

COSTA E. and LOYOLA P.

Abstract (from CDS):

Optical positions relative to the International Reference Stars Catalogue (IRS), and therefore in the system of the FK5, have been obtained for the optical counterparts of 40 compact extragalactic radio sources south of δ~+6°. Many of these sources are being considered as possible Benchmark objects for the establishment of a quasi-inertial unified radio/optical reference frame. Precision levels as good as 0.1" in both coordinates were achieved. A comparison with VLBI radio positions available for these sources is presented. We give new evidence for the existence of an offset in the origin of right ascension between the radio and optical reference frames as defined at present.

Abstract Copyright: ∼

Journal keyword(s): astrometry - reference systems

Simbad objects: 40

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Number of rows : 40
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 B0019+058 BLL 00 22 32.44121084 +06 08 04.2689202   19.2   19.07   ~ 152 1
2 3C 15 SyG 00 37 04.1107321824 -01 09 08.407668996   15.34       ~ 232 1
3 ICRF J003820.5-020740 Sy1 00 38 20.52934376 -02 07 40.5469964   19.04 18.02 17.6   ~ 255 1
4 QSO B0131-522 Bla 01 33 05.76250002 -52 00 03.9454078   18.68 20.3 18.63   ~ 129 1
5 QSO B0219-637 QSO 02 20 54.1703438112 -63 30 19.387256904   18.5 18.5 19.25   ~ 28 1
6 QSO B0332-403 BLL 03 34 13.65448823 -40 08 25.3979928 18.54 18.35 17.87 17.5   ~ 349 1
7 QSO B0355-483 Bla 03 57 21.9179670240 -48 12 15.159541932   16.71 16.38 16.08   ~ 84 1
8 QSO B0454-463 Bla 04 55 50.77248730 -46 15 58.6797903   17.89 17.4 16.87   ~ 229 1
9 QSO B0454+0356 Bla 04 56 47.1747907776 +04 00 52.946102484   16.76 16.53 16.26   ~ 247 1
10 QSO B0521-262 QSO 05 23 18.4698419808 -26 14 09.551529060   18.5       ~ 36 1
11 QSO B0537-158 QSO 05 39 32.0101889928 -15 50 30.319813320   16.5 18.0     ~ 77 1
12 QSO B0622-4411 Bla 06 23 31.7861121984 -44 13 02.541931860   17.15 16.93     ~ 64 1
13 QSO B1202-2617 Bla 12 05 33.21228668 -26 34 04.4634651   19.81 19.5 19.3   ~ 176 1
14 QSO B1207-399 Bla 12 09 35.2436926176 -40 16 13.097173656   17.49 16.98     ~ 70 1
15 QSO B1236-684 QSO 12 39 46.65140009 -68 45 30.8925650   18.5       ~ 28 1
16 QSO B1351+021 Bla 13 53 51.5845158504 +01 51 53.886705084   18.73 18.54 19.7   ~ 87 1
17 QSO B1509+022 Bla 15 12 15.7418011536 +02 03 16.978221972   18.94 18.31 16.6   ~ 149 1
18 QSO B1549-790 Bla 15 56 58.86979525 -79 14 04.2817241   18.80 18.800 17.84   ~ 221 1
19 4C -00.63 QSO 16 04 56.1437338776 -00 19 07.073082156   17.78 17.48     ~ 109 1
20 4C 00.58 rG 16 06 12.6837900528 +00 00 27.196980048   16.85       ~ 72 1
21 NGC 6328 QSO 17 23 41.02933859 -65 00 36.6106377   13.17 13.2 11.45 12.2 ~ 270 1
22 ICRF J173735.7-563403 Sy2 17 37 35.7711421992 -56 34 03.153321552   17.0       ~ 96 0
23 QSO B1823-455 Bla 18 27 10.2379158768 -45 33 09.964295820   17.3   17.24   ~ 34 1
24 QSO B1831-711 Bla 18 37 28.7148576048 -71 08 43.554135084   17.89 17.5 16.66   ~ 96 1
25 QSO B1852-534 QSO 18 57 00.4517958336 -53 25 00.382998900   18.5       ~ 29 1
26 QSO B1929-457 Bla 19 32 44.88774432 -45 36 37.9289309   18.47 19.50 17.13   ~ 80 2
27 QSO B2004-447 Bla 20 07 55.1842447944 -44 34 44.274118260   19.3 19.3 18   ~ 185 1
28 QSO B2022-702 QSO 20 27 24.5349785088 -70 07 17.407253856   18.8 18.8     ~ 23 1
29 QSO B2052-474 Bla 20 56 16.35980507 -47 14 47.6277179   18.29 19.1 18.07   ~ 341 1
30 QSO B2058-425 QSO 21 01 59.1137330928 -42 19 16.165821072   17.56 17.20     ~ 54 1
31 PKS 2105-489 rG 21 08 50.79701083 -48 46 21.6197559   20.1       ~ 17 2
32 QSO B2205-636 QSO 22 08 47.2422412104 -63 25 47.490225240   18.5 18.5     ~ 32 1
33 BWE 2217+0149 QSO 22 20 30.7733389992 +02 04 54.049184832   19.3       ~ 18 1
34 ICRF J231635.1+040518 Sy2 23 16 35.1933566880 +04 05 18.297101076   17.54 16.68 17.220   ~ 309 1
35 QSO B2314-409 Bla 23 16 46.91990359 -40 41 21.0863175   17.9 17.9     ~ 76 1
36 ICRF J232653.7-020213 BLL 23 26 53.77670595 -02 02 13.7811657   18.3       ~ 60 1
37 QSO B2327-459 QSO 23 30 37.6811859048 -45 39 58.109646492   19.0       ~ 28 1
38 QSO B2332-017 Bla 23 35 20.41204300 -01 31 09.5917037   18.4 18.78 18.35   ~ 116 1
39 LBQS 2351-0036 Bla 23 54 09.1759863576 -00 19 47.954748072   18.80 18.48 18.1   ~ 117 1
40 QSO B2352-455 QSO 23 55 28.7700383280 -45 13 25.798326456     17.5     ~ 25 1

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