So near, and yet, so far, Spectroscopic redshifts for the G4Jy Sample

Low-frequency radio emission allows powerful active-galaxies to be selected in a way that is unaffected by dust obscuration and orientation of the radio-jet axis. Currently, there are too few 'radio-loud' galaxies for robust studies in terms of redshift-evolution and/or environment. Hence the use of low-frequency observations over the southern sky to construct a sample that is 10 times larger than the heavily relied-upon 3CRR sample (of the northern hemisphere). This is the GLEAM 4-Jy (G4Jy) Sample, which is a legacy compilation of 1,863 bright radio-sources (White et al., 2020a, 2020b). In this talk I will present the results of widely-awaited multiwavelength analysis, which includes the calculation of intrinsic properties that reveal the true power of these powerful radio-galaxies (White et al., in prep.). This is thanks (in large part) to collating spectroscopic redshifts for 34% of the sample, with 169 of these being new redshifts courtesy of dedicated follow-up on the Southern African Large Telescope (White et al. 2025; Sejake et al., in prep.). I will conclude with remarks on some of the most interesting G4Jy sources, including the famous "Dancing Ghosts".