Absorption-corrected X-ray luminosity (0.5–7 keV)–orbital period diagram for known CVs from the Ritter & Kolb (2003) catalog. X-ray luminosities were computed from fluxes in the ROSAT source catalog (2RXS) and distances in Gaia DR3. Circles represent CVs: known IP (red), polars (green), and nonmagnetic (gray). Vertical lines indicate the period minimum for CVs from Gänsicke et al. (2009, ≈82 min, dashed line) and Knigge (2006, ≈76 min, dotted line). The gray shaded regions show the CV orbital period gap from Schreiber et al. (2024, ≈2.5 − 3.2 h); and Knigge (2006, ≈2.2 − 3.2 h). The star markers denote new spectroscopically confirmed CVs (blue) and their candidates (white) from Table 1. We present two cases (Case A and Case B) for 2CXO J044048.3+292434 and 2CXO J173118.6+224248 as we cannot distinguish between the two orbital periods with our current data. For more details, see Sect. 5.