Spectral energy distribution of V479 And comprised of the HST/COS ultraviolet spectrum (dark grey) and the SDSS optical spectrum (black). In blue and red are shown the upper limits for a white dwarf and a main-sequence star, respectively (see Section 3.2). The donor’s model assumes a distance of 1850 pc. The white dwarf model is scaled to the same distance, and both are plotted on an absolute flux scale.