Towards direct imaging and orbital parameter estimation of supermassive black hole binaries with spaceborne VLBI

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Volume 711 (July 2026)

A&A, 711 (2026) A293

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Table C.7

Case 7 orbit fitting summary.

Parameter	True	MAP	Median
M [10⁹ (M_⊙)]	0.300	1.722 (474%)	${0.808}_{- 0.461}^{+ 1.224}$ $Mathematical equation: $0.808^{+1.224}_{-0.461}$$
q [-]	1.000	0.817 (18.3%)	${0.507}_{- 0.353}^{+ 0.332}$ $Mathematical equation: $0.507^{+0.332}_{-0.353}$$
a [pc]	0.0303	0.0735 (142%)	${0.0429}_{- 0.0146}^{+ 0.0788}$ $Mathematical equation: $0.0429^{+0.0788}_{-0.0146}$$
e [-]	0.000	0.415	${0.355}_{- 0.282}^{+ 0.352}$ $Mathematical equation: $0.355^{+0.352}_{-0.282}$$
i [°]	0	73.3	${52.9}_{- 35.6}^{+ 20.4}$ $Mathematical equation: $52.9^{+20.4}_{-35.6}$$
ω [°]	0	94.8	${150.2}_{- 97.9}^{+ 157.0}$ $Mathematical equation: $150.2^{+157.0}_{-97.9}$$
Ω [°]	0	102.2	${137.3}_{- 70.5}^{+ 160.7}$ $Mathematical equation: $137.3^{+160.7}_{-70.5}$$
τ [-]	0	0.550	${0.499}_{- 0.408}^{+ 0.375}$ $Mathematical equation: $0.499^{+0.375}_{-0.408}$$

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