When computing the instrument temperature response functions, a particular abundance model is assumed. In general, when computing the DEM through inversion, we don't want to assume a particular abundance model as we are trying to determine which abundance model best matches the observations.
We should have a function that computes the temperature response of both AIA and XRT for different abundances. This involves folding the emissivity through the wavelength response functions of the instrument.
When computing the instrument temperature response functions, a particular abundance model is assumed. In general, when computing the DEM through inversion, we don't want to assume a particular abundance model as we are trying to determine which abundance model best matches the observations.
We should have a function that computes the temperature response of both AIA and XRT for different abundances. This involves folding the emissivity through the wavelength response functions of the instrument.