Observed SEDs of AT 2019azh, compared with both the best fitting dust models as in Fig. 2, and selected reprocessing models. The SED at 7 d is well fitted by the model with ρ_scale = 2 and L_inj = 16 L₄₅. The models at 17 and 38 d assume that the density and luminosity scale linearly during the decline of the accretion rate. The reduced χ² values associated with these models are listed in Table 2.