Projected phase-space diagram presenting the caustic curves of redshift versus projected cluster-centric distance. Red open circles and blue stars denote quenched and star-forming galaxies based on their IMACS spectra. Green filled circles mark galaxies with spectroscopic redshifts from the literature (Caminha et al. 2022; Mahler et al. 2023; Noirot et al. 2023). Galaxies within the black caustic lines are classified as cluster members (shown by having brightly-coloured symbols), while non-members have paler colours. The blue horizontal line indicates the median redshift of the cluster.