The large quasar reference frame (LQRF) - An optical representation of the ICRS

Home

All issues

Volume 505 / No 1 (October I 2009)

A&A, 505 1 (2009) 385-404

Full HTML

Free Access

Table 4:

Direction cosines relative to the ERF after the application of the local astrometric corrections^a.
Solution	N	A1	A2	A3	A4	A5
BU6	2616	-33.7 $\pm$ 6.3	-8.0 $\pm$ 6.1	50.8 $\pm$ 5.3	40.5 $\pm$ 10.7	2.6 $\pm$ 5.3
BN6	244	-5.5 $\pm$ 12.9	31.8 $\pm$ 14.1	123.0 $\pm$ 25.2	1.5 $\pm$ 12.8
BT6	3764	-23.8 $\pm$ 5.1	1.5 $\pm$ 4.7	23.7 $\pm$ 4.6	27.5 $\pm$ 9.7	-21.0 $\pm$ 4.3
BU4	2522	-37.5 $\pm$ 6.3	-4.9 $\pm$ 6.2	48.6 $\pm$ 5.4	42.1 $\pm$ 10.7	0.0 $\pm$ 5.4
BN4	240	-0.4 $\pm$ 12.9	34.7 $\pm$ 14.1	118.9 $\pm$ 25.4	-0.3 $\pm$ 12.8
BT4	3762	-24.6 $\pm$ 5.1	1.4 $\pm$ 4.7	24.3 $\pm$ 4.6	24.7 $\pm$ 9.6	-21.7 $\pm$ 4.3
GU6	3238	-7.0 $\pm$ 5.8	-3.1 $\pm$ 5.3	30.4 $\pm$ 4.7	100.8 $\pm$ 9.3	15.2 $\pm$ 4.8
GN6	300	-7.2 $\pm$ 13.2	16.3 $\pm$ 14.2	-43.4 $\pm$ 25.1	-4.7 $\pm$ 13.1
GT6	3940	-4.0 $\pm$ 4.7	-4.9 $\pm$ 4.4	8.7 $\pm$ 4.3	30.2 $\pm$ 8.7	-6.1 $\pm$ 4.0
GU4	3240	-7.7 $\pm$ 5.8	-2.5 $\pm$ 5.3	29.4 $\pm$ 4.7	99.1 $\pm$ 9.3	14.7 $\pm$ 4.8
GN4	308	-7.1 $\pm$ 13.1	15.7 $\pm$ 14.0	-40.4 $\pm$ 24.7	-6.8 $\pm$ 12.9
GT4	3938	-3.7 $\pm$ 4.7	-6.0 $\pm$ 4.4	8.7 $\pm$ 4.3	30.1 $\pm$ 8.7	-6.3 $\pm$ 4.0
SU6	480	-5.3 $\pm$ 4.7	-14.6 $\pm$ 4.8	-4.8 $\pm$ 3.7	16.6 $\pm$ 4.1
SN6	74	-5.0 $\pm$ 11.6	14.8 $\pm$ 13.9	32.0 $\pm$ 17.8	9.8 $\pm$ 13.1
ST6	600	-13.9 $\pm$ 5.5	-14.6 $\pm$ 6.0	-5.1 $\pm$ 4.9	20.1 $\pm$ 5.3
SU4	478	-5.5 $\pm$ 4.5	-12.8 $\pm$ 4.6	-5.2 $\pm$ 3.5	16.3 $\pm$ 4.0
SN4	74	-6.2 $\pm$ 11.4	13.1 $\pm$ 13.8	33.2 $\pm$ 17.6	9.5 $\pm$ 13.0
ST4	600	-14.3 $\pm$ 5.5	-14.2 $\pm$ 6.0	-4.7 $\pm$ 4.9	19.2 $\pm$ 5.3

^a Direction cosines A1, A2, and A3 from the comparison of the equatorial positions as found for each family of solutions and as given by the radio interferometry for the ERF objects. The equatorial bias A4 (north of declination -20 $^{\circ }$ ) and A5 (south of declination -20 $^{\circ }$ ), when applicable, are also presented. The solutions nomenclature is formed by one letter designating the quasar position input catalog, followed by one letter designating the stellar reference frame, and by the codes 6 and 4 informing whether the algorithm is of the six or four-parameter models. N is the number of equations used to derive the direction cosines and equatorial biases. All angular values are in milli-arcsec.

Source LaTeX | All tables | In the text

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.