Identification of the different targets and regions in the FoV of SPT0311–58. The apertures used to extract the spectra of the ∼6.9 sources are coded in red (with the subregions within E in orange), and those for the low-z galaxies in blue. Source L7, which is identified by spectral decomposition (Sect. 3.3.3), is shown for completeness. The W galaxy is not detected at the resolution of the IFU, and is shown with a dashed line. More details about the apertures in Appendix A.