Demonstration of the image reconstruction process, for the 2007 observations. The cross denotes the position of the pulsar. The grayscale wedge (with scale) is for all images. a): raw Stokes V image. Level spacing is 12 mJy/beam (corresponding to about 3   σ_rms); b): average of Stokes U images (Nasmyth reference, level spacing 30 mJy); c): average of scaled Stokes U images after convolution with modeled instrumental response to Stokes V. Contours as in a); d): residual Stokes V image after subtraction of the images averaged in c)) from the corresponding Stokes V maps. Level spacing is 12 mJy, about 3σ_rms.