Continuum-subtracted spectra of the Lyman-α emission line identified significantly within the MUSE footprint around SPT2359-56. The spectra are centered at the central velocity of the protocluster (λ = 6444.2 Å). The measured fluxes are given in Table 1. The red dotted line shows the redshift determined using the prescription from Verhamme et al. (2018). The nomenclature of the LAEs does not follow the signal-to-noise ratio of the emission lines.