L_ν,rad–L_CBO diagram. Different symbols are used to distinguish the stars analyzed in this paper from the stars already analyzed in other papers (Leto et al. 2021; Shultz et al. 2022; Das et al. 2025a). The shaded diagonal bands represent the region at 1σ (gray) and 3σ (light-gray) statistical confidence levels obtained by the linear fit of the data. Open downward triangles locate the BA-type magnetic stars not detected by the VLA observations reported in this paper (below the 3σ detection threshold); the downward arrowhead corresponds to the luminosity estimated using the RMS measured on the radio maps (1σ level).