Colour-period diagram for NGC 2516 cluster members. Filled symbols represent cluster members also detected in X-rays, while open symbols indicate rotators within the eROSITA FoV not detected in X-rays. Rotation periods are from F20 and additional studies in the literature (see text). The diagram is well populated in all relevant regions, allowing us to investigate the X-ray properties of stars with a very wide range of rotation and mass/spectral type without a bias against certain types. Binaries are indicated with squares whereas stars without signs of binarity are marked with circles.