X-ray properties of He ii λ 1640 emitting galaxies in VANDELS. - Saxena, A; Pentericci, L; Schaerer, D; Schneider, R; Amorin, R; Bongiorno, A; Calabrò, A; Castellano, M; Cimatti, A; Cullen, F; Fontana, A; Fynbo, J P U; et al. (Monthly Notices of the Royal Astronomical Society, 2020)