NOT ALFOSC gr7 spectrum of GOTO0650 obtained at +28.1 d at the bottom of the decline off plateau (g≈19). A five-pixel variance-weighted boxcar filter was applied to reduce noise. The inset panel is centred on the prominent Hα emission line, showing tentative indications of a more complex profile, but ultimately limited by spectral resolution. The WD contribution was estimated from the best-fitting model SED estimated in Section 4.5, scaled to the distance inferred in Section 4 assuming a fixed log g of 8 and a radius inferred from the sequences of Bédard et al. (2020).