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

Full paper

View the references in ADS

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 - 2023	#notes
1	QSO B0019+058	BLL	00 22 32.44121084	+06 08 04.2689202		19.2		19.07		~	121	1
2	3C 15	BiC	00 37 04.1107321824	-01 09 08.407668996		15.34				~	219	1
3	ICRF J003820.5-020740	Sy1	00 38 20.52934376	-02 07 40.5469964		19.04	18.02	17.6		~	226	1
4	ICRF J013305.7-520003	Sy1	01 33 05.76250002	-52 00 03.9454078		18.68	20.3	18.63		~	102	0
5	QSO B0219-637	QSO	02 20 54.1703438112	-63 30 19.387256904		18.5	18.5	19.25		~	25	1
6	QSO B0332-403	BLL	03 34 13.65448823	-40 08 25.3979928	18.54	18.35	17.87	17.5		~	305	1
7	QSO B0355-483	QSO	03 57 21.9179670240	-48 12 15.159541932		16.71	16.38	16.08		~	74	1
8	QSO B0454-463	QSO	04 55 50.77248730	-46 15 58.6797903		17.89	17.4	16.87		~	206	1
9	QSO B0454+0356	QSO	04 56 47.1747907776	+04 00 52.946102484		16.76	16.53	16.26		~	238	1
10	QSO B0521-262	QSO	05 23 18.4698419808	-26 14 09.551529060		18.5				~	28	1
11	QSO B0537-158	QSO	05 39 32.0101889928	-15 50 30.319813320		16.5	18.0			~	70	1
12	QSO B0622-4411	QSO	06 23 31.7861121984	-44 13 02.541931860		17.15	16.93			~	61	1
13	ICRF J120533.2-263404	Sy1	12 05 33.21228668	-26 34 04.4634651		19.81	19.5	19.3		~	141	1
14	QSO B1207-399	QSO	12 09 35.2436926176	-40 16 13.097173656		17.49	16.98			~	65	1
15	QSO B1236-684	QSO	12 39 46.65140009	-68 45 30.8925650		18.5				~	27	1
16	QSO B1351+021	Bla	13 53 51.5845158504	+01 51 53.886705084		18.73	18.54	19.7		~	80	1
17	ICRF J151215.7+020316	Sy2	15 12 15.7418011536	+02 03 16.978221972		18.94	18.31	16.6		~	120	1
18	QSO B1549-790	QSO	15 56 58.86979525	-79 14 04.2817241		18.80	18.800	17.84		~	195	1
19	4C -00.63	QSO	16 04 56.1437338776	-00 19 07.073082156		17.78	17.48			~	106	1
20	4C 00.58	rG	16 06 12.6837900528	+00 00 27.196980048		16.85				~	67	1
21	NGC 6328	QSO	17 23 41.02933859	-65 00 36.6106377		13.17	13.2	11.45	12.2	~	232	1
22	ICRF J173735.7-563403	Sy1	17 37 35.7711421992	-56 34 03.153321552		17.0				~	87	0
23	QSO B1823-455	QSO	18 27 10.2379158768	-45 33 09.964295820		17.3		17.24		~	31	1
24	QSO B1831-711	QSO	18 37 28.7148576048	-71 08 43.554135084		17.89	17.5	16.66		~	91	1
25	QSO B1852-534	QSO	18 57 00.4517958336	-53 25 00.382998900		18.5				~	26	1
26	QSO B1929-457	QSO	19 32 44.88774432	-45 36 37.9289309		18.47	19.50	17.13		~	58	2
27	ICRF J200755.1-443444	Sy1	20 07 55.1842447944	-44 34 44.274118260		19.3	19.3	18		~	164	1
28	QSO B2022-702	QSO	20 27 24.5349785088	-70 07 17.407253856		18.8	18.8			~	21	1
29	QSO B2052-474	QSO	20 56 16.35980507	-47 14 47.6277179		18.29	19.1	18.07		~	299	1
30	QSO B2058-425	QSO	21 01 59.1137330928	-42 19 16.165821072		17.56	17.20			~	50	1
31	QSO B2105-489	Q?	21 08 50.79701083	-48 46 21.6197559		20.1				~	15	2
32	QSO B2205-636	QSO	22 08 47.2422412104	-63 25 47.490225240		18.5	18.5			~	30	1
33	BWE 2217+0149	QSO	22 20 30.7733389992	+02 04 54.049184832		19.3				~	16	1
34	ICRF J231635.1+040518	Sy2	23 16 35.1933566880	+04 05 18.297101076		17.54	16.68	17.220		~	291	1
35	QSO B2314-409	QSO	23 16 46.91990359	-40 41 21.0863175		17.9	17.9			~	68	1
36	ICRF J232653.7-020213	BLL	23 26 53.77670595	-02 02 13.7811657		18.3				~	53	1
37	QSO B2327-459	QSO	23 30 37.6811859048	-45 39 58.109646492		19.0				~	26	1
38	QSO B2332-017	QSO	23 35 20.41204300	-01 31 09.5917037		18.4	18.78	18.35		~	91	1
39	LBQS 2351-0036	QSO	23 54 09.1759863576	-00 19 47.954748072		18.80	18.48	18.1		~	109	1
40	QSO B2352-455	QSO	23 55 28.7700383280	-45 13 25.798326456			17.5			~	24	1

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