Peak residuals and Errors for MFS with different values of N_t: These plots show the measured peak residuals (top left) and the errors on I_υ0 (top right), I_α (bottom left), and I_β (bottom right) when a point-source of flux 1.0 Jy and α =  −1.0 was imaged using Taylor polynomials of different orders (N_t = 1−7) and a linear spectral basis. The x-axis of all these plots show the value of N_t used for the simulation and plots for α and β begin from N_t = 2 and N_t = 3 respectively. An example of how to read these plots: for a 2:1 bandwidth ratio, a source with spectral index = –1.0 and N_t = 4, the achievable dynamic range (measured as the ratio of the peak flux to the peak residual near the source) is about 10⁵, the error on the peak flux at the reference frequency is 1 part in 10³, and the absolute errors on α anre β are    10^-2 and    10^-1 respectively.