Colored lines are HR 8799 e visibilities |V_planet|, as defined by Eq. (1), obtained from the ratio between the coherent flux observed on the planet and on the star. The underlying dotted colored lines correspond to the errors estimated by the pipeline. The theoretical stellar visibility corresponds to the black dashed line (uniform disk of diameter 0.342 mas). The upper horizontal dotted black line corresponds to the observed incoherent flux (stellar flux leaking in the planet’s field). The lower horizontal dotted black line corresponds to the theoretical visibility of a planet 10.7 mag fainter than the star. Right inset: coverage of the spatial frequency plane, east is to the right. The arrow indicates the direction of the planet situated to the northwest of the star.