Sum of the 16 reduced images of Wagner et al. (2021), shown at the top, where a fake planet moving of ≈9 pixels along one of the orbit (a = 1.58 au, e = 0.13, t0 = −1.78 yr, Ω = −3.14 rad, i = 0.38 rad, θ₀ = 2.2 rad) tested by K-Stacker (see Fig. 5) has been injected at S/N ≈ 1. C1 has been masked by a small circle visible at top-left. The planet is not detectable with a simple co-addition of the images. Bottom: same images recombined by K-Stacker. We detected the planet at the position shown by the arrow at an (S/N)_KS ≈ 5.