A celestial reference frame derived from observations with the Very Long Baseline Interferometry Global Observing System

Open Access

Table 5

VSH parameters up to degree and order two for VIE2023-VG CRF with respect to ICRF3-SX and VIE2023sx.

	ICRF3-SX	VIE2023sx	ICRF3-SX	VIE2023sx
D_n	<15	<15	<5	<5
No. sources	408	410	333	327
R₁	56 ± 16	51 ± 16	22 ± 19	19 ± 10
R₂	−26 ± 17	0 ± 16	−28 ± 11	0 ± 10
R₃	24 ± 9	38 ± 9	21 ± 6	27 ± 6
D₁	−22 ± 16	−19 ± 15	−27 ± 11	−20 ± 10
D₂	−61 ± 16	−47 ± 15	−25 ± 10	−28 ± 9
D₃	−1 ± 13	27 ± 12	1 ± 8	26 ± 8
$a_{2, 0}^{e}$ $\[a_{2,0}^{e}\]$	−28 ± 13	−52 ± 13	−17 ± 9	−30 ± 8
$a_{2, 0}^{m}$ $\[a_{2,0}^{m}\]$	18 ± 11	14 ± 11	16 ± 7	1 ± 7
$a_{2, 1}^{e, R e}$ $\[a_{2,1}^{e, R e}\]$	−59 ± 16	−54 ± 15	−28 ± 11	−25 ± 10
$a_{2, 1}^{e, I m}$ $\[a_{2,1}^{e, I m}\]$	35 ± 17	28 ± 16	21 ± 11	22 ± 10
$a_{2, 1}^{m, R e}$ $\[a_{2,1}^{m, R e}\]$	−36 ± 16	−25 ± 15	−10 ± 10	−11 ± 10
$a_{2, 1}^{m, I m}$ $\[a_{2,1}^{m, I m}\]$	−21 ± 17	−14 ± 16	−29 ± 11	−25 ± 10
$a_{2, 2}^{e, R e}$ $\[a_{2,2}^{e, R e}\]$	11 ± 6	9 ± 6	4 ± 4	1 ± 4
$a_{2, 2}^{e, I m}$ $\[a_{2,2}^{e, I m}\]$	−1 ± 6	0 ± 6	3 ± 4	2 ± 4
$a_{2, 2}^{m, R e}$ $\[a_{2,2}^{m, R e}\]$	−1 ± 7	−6 ± 7	−3 ± 5	−1 ± 4
$a_{2, 2}^{m, I m}$ $\[a_{2,2}^{m, I m}\]$	3 ± 7	3 ± 7	4 ± 5	3 ± 4

Notes. Units are μas. The second and third columns show comparisons for sources with normalized angular separation D_n < 15. In the last two columns the comparison for sources with D_n < 5 with respect to ICRF3-SX (85 outliers) and VIE2023sx (91 outliers) is shown.

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