This is similar to Fig. 2. The dashed curve again represents the Fourier residuals, whereas the dash-dot and dotted curves are residuals from a Sault-Wieringa clean using two different types of basis function. For the dash-dot curve, Chebyshev polynomials up to order 5 were employed to generate the Sault-Wieringa beams; the dotted curve is the result of using the half-frequency cosine functions (also to the order 5).