SED of IX Vel obtained with different instruments. The X-shooter and HST spectra are presented in their original flux; the flux of IUE and UVES spectra was multiplied by an arbitrary factor to match the values of the X-shooter and HST spectra. The green line represents the expected contribution of a WD with a temperature of T = 60 000 K, mass M_WD = 0.8 M_⊙, radius R_WD = 0.015 R_⊙ (Linnell et al. 2007), and distance d = 90 pc (Gaia Collaboration 2020). The black dashed line represents a fit to the spectrum with a power law whose slope is −2.6.