K-Stacker: an algorithm to hack the orbital parameters of planets hidden in high-contrast imaging - First applications to VLT/SPHERE multi-epoch observations

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Volume 639 (July 2020)

A&A, 639 (2020) A113

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Table A.1

Orbital parameters of the injected and found planets (true positives) during the blind test described at Sect. 3.

	a(au)	e	t₀ (year)	Ω (rad)	i (rad)	w₀ (rad)	Δ (pixels)	S∕N	%T
Injected	4.17	0.25	−0.84	1.9	2.89	0.08		11	38
Found	4.54 ± 0.45	0.19 ± 0.03	−0.62 ± 0.37	2.35 ± 0.66	2.73 ± 0.11	0.93 ± 0.66	0.41	10.5

Injected	6.24	0.41	−0.92	3.33	2.25	2.19		9.9	21
Found	4.91 ± 0.5	0.37 ± 0.03	−1.4 ± 0.22	3.47 ± 0.2	2.35 ± 0.11	1.76 ± 0.2	0.40	9.4

Injected	7.37	0.19	−7.14	6.89	0.58	3.99		8	15
Found	7.02 ± 0.26	0.34 ± 0.03	−7.70 ± 0.83	6.15 ± 0.33	0.53 ± 0.11	4.43 ± 0.33	0.65	8.28

Injected	6.51	0.07	19.63	0.06	2.69	6.81		8.2	19
Found	6.18 ± 0.39	0.01 ± 0.06	13.48 ± 3.13	0.39 ± 1.43	2.73 ± 0.17	5.11 ± 1.43	0.27	8.3

Injected	5.72	0.1	2.76	2.80	2.83	4.62		6.47	23
Found	6.3 ± 0.48	0.17 ± 0.04	2.04 ± 0.49	2.62 ± 1.01	2.74 ± 0.16	4.05 ± 1.01	0.45	6.3

Notes. Δ (pixels) is the mean distance between the injected and found positions of the planet in the images. S/N is the S/N computed using the orbits of injection (S/N)_tot and the mean orbit found (S/N)_KS. %T is the percentage of the covered orbit.

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