S-band QS Vir detections (see Table 2) on the L_R − L_X diagram, alongside M dwarfs (spectral type M1.5 to M8.5) and CAS systems detected in VLASS from the Yiu et al. (2024) dataset as well as AD Leo from Villadsen & Hallinan (2019). We also plot a sample of CVs from Coppejans et al. (2015, 2016), Barrett et al. (2020), Hewitt et al. (2020), and Ridder et al. (2023) that were within 15″ of a source in the Second ROSAT All-Sky Survey Catalog (Boller et al. 2016). The black dashed line represents the Güdel-Benz relation (Williams et al. 2014). Two M dwarfs from the Yiu et al. (2024) sample were excluded from this plot, as their X-ray luminosities were below 10²⁶ erg s⁻¹. UV Cet and AD Leo (discussed above), have also been highlighted. The X-ray luminosities are dominated by systematics, so error bars are not shown, except for QS Vir.