1997A&A...318..653X

Query : 1997A&A...318..653X

1997A&A...318..653X - Astronomy and Astrophysics, volume 318, 653-656 (1997/2-2)

Correction to the precession constant from optical observations of extragalactic sources.

XU T.-Q., LU P.-Z. and WANG S.-H.

Abstract (from CDS):

The rediscussion of the precession constant was performed by optical observations of the counterparts of extragalactic radio sources with longer observational intervals. After a reduction of the optical catalogue systems, the fictitious `proper motions' of extragalactic radio sources were obtained in the FK5 system. On the assumption that these fictitious `proper motions' of extragalactic sources are the reflection of an incorrcet value of the precession constant, then the correction of precession constant can be estimated. The corrections are -2.60±1.35mas/yr for 43 sources and -3.35±1.62mas/yr for 24 sources, respectively. If the improvement of the 18.6-year nutation term is considered in the data processing, the corrections of the precession constant are -2.91±1.38mas/yr and -3.52±1.68mas/yr, respectively. The results were also compared with those from VLBI.

Abstract Copyright: ∼

Journal keyword(s): astrometry - reference systems - radio continuum: galaxies

CDS comments: Table 2 : 1224-255 misprint for 1244-255

Simbad objects: 42

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Number of rows : 42
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 QSO B0008-264 BLL 00 11 01.24673726 -26 12 33.3771340   19.53   19.64   ~ 81 0
2 QSO B0104-408 QSO 01 06 45.10796439 -40 34 19.9603733   18.60 19.0 19.25   ~ 130 0
3 QSO B0111+021 BLL 01 13 43.14494773 +02 22 17.3162687   16.4 16.0 11.22   ~ 133 1
4 QSO B0113-1152 QSO 01 16 12.52201438 -11 36 15.4344705   18.5 18.5 17.72   ~ 186 1
5 QSO B0150-334 QSO 01 53 10.1215560912 -33 10 25.860644724   17.75 18.60 17.2   ~ 80 1
6 QSO B0208-512 BLL 02 10 46.2004407600 -51 01 01.893013392   17.10 16.93 14.82   ~ 447 1
7 ICRF J023945.4-023440 Sy1 02 39 45.47227239 -02 34 40.9145702   19.5 21 19.04   ~ 134 1
8 QSO B0332-403 BLL 03 34 13.65448823 -40 08 25.3979928 18.54 18.35 17.87 17.5   ~ 324 1
9 QSO B0336-0156 QSO 03 39 30.93778633 -01 46 35.8041892   18.96 18.41 17.33   ~ 557 1
10 QSO J0403-3605 Bla 04 03 53.74990003 -36 05 01.9131880   17.04 17.17 16.67   ~ 285 1
11 QSO B0420-0127 QSO 04 23 15.80072217 -01 20 33.0656073   17.50 17.00 16.28   ~ 1207 3
12 Mrk 1506 Sy1 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 2000 2
13 QSO B0440-003 Bla 04 42 38.66072366 -00 17 43.4209582   19.59 19.22 17.85   ~ 399 1
14 QSO B0451-281 QSO 04 53 14.64679973 -28 07 37.3269982   18.23 18.2 17.83   ~ 206 1
15 QSO B0537-441 BLL 05 38 50.36155950 -44 05 08.9390233   15.77 16.48 16   ~ 883 2
16 QSO B0605-0834 BLL 06 07 59.69924014 -08 34 49.9783246     17.60 17.70   ~ 460 1
17 QSO B0607-157 QSO 06 09 40.94954062 -15 42 40.6727537   18.47 18.00 19.90   ~ 315 1
18 QSO J0635-7516 Bla 06 35 46.5079301472 -75 16 16.816418256   15.96 15.75 15.82   ~ 587 1
19 QSO B0736+01 QSO 07 39 18.03389906 +01 37 04.6177501   16.90 16.47 16.19   ~ 687 1
20 QSO B0920-397 Bla 09 22 46.41826886 -39 59 35.0682386   18.12 18.8     ~ 130 1
21 ICRF J105829.6+013358 Sy1 10 58 29.60520810 +01 33 58.8237454   18.74 18.28 16.68   ~ 775 2
22 QSO J1130-1449 Bla 11 30 07.0523452128 -14 49 27.388021944   17.17 16.90 16 16.97 ~ 707 1
23 QSO B1144-3755 BLL 11 47 01.37071212 -38 12 11.0235229   19.03 16.2 16.72   ~ 299 1
24 4C -00.47 QSO 11 50 43.8706351104 -00 23 54.203006868   17.51 17.38 17.1   ~ 367 1
25 4C 03.23 QSO 12 24 52.42194302 +03 30 50.2927775   19.02 18.77 18.9   ~ 144 1
26 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5798 1
27 QSO J1246-2547 QSO 12 46 46.80203943 -25 47 49.2889822   17.65 17.41 16.96 15.5 ~ 284 1
28 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3042 2
29 QSO B1430-178 QSO 14 32 57.69062795 -18 01 35.2488081   17.8 19.5 18.4   ~ 90 1
30 QSO J1512-0906 Bla 15 12 50.53293048 -09 05 59.8297908   16.74 16.54     ~ 1316 1
31 QSO B1555+001 QSO 15 57 51.43397121 -00 01 50.4137827   20.10 19.72 18.75   ~ 180 1
32 QSO J1658+0515 QSO 16 58 33.4471896264 +05 15 16.442476596   17.00 16.54 16.21   ~ 227 1
33 QSO B1730-130 QSO 17 33 02.70578907 -13 04 49.5482119   18 19.50 18.78 17.39 ~ 1138 1
34 QSO B1741-038 QSO 17 43 58.85613537 -03 50 04.6167326     20.40 17.98   ~ 548 1
35 QSO B1933-400 QSO 19 37 16.21735889 -39 58 01.5531167   18.15 19 17.43   ~ 194 2
36 QSO B2008-159 Bla 20 11 15.71092555 -15 46 40.2537406   17.27 18.30 16.35   ~ 176 1
37 QSO B2134+0028 QSO 21 36 38.58632232 +00 41 54.2128562   17.30 17.08 17.02   ~ 562 2
38 QSO B2155-152 QSO 21 58 06.28188411 -15 01 09.3284729   18.63 18.30 17.79   ~ 334 1
39 3C 446 BLL 22 25 47.25929101 -04 57 01.3907626   18.83 18.39 16.3   ~ 830 1
40 QSO B2320-035 QSO 23 23 31.95375055 -03 17 05.0238540   18.6   18.16   ~ 205 1
41 QSO B2326-477 QSO 23 29 17.7043623168 -47 30 19.113949332   16.93 16.79 16.30   ~ 196 1
42 QSO B2345-167 QSO 23 48 02.60851466 -16 31 12.0222546   18.00 18.41 16.86   ~ 405 1

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