All coronagraphic images of our target sample. The color scale is linear in all images with the same cuts in each row, but different cuts for different sources. The color scale is symmetric around 0. The gray hashed circles show the coronagraph size and position. The Stokes Q and U images are in the first two columns and the derived Q_ϕ and U_ϕ images in columns 3 and 4. In column 5 is shown the Q_ϕ image corrected for the separation-dependent drop-off in illumination (taking into account the system inclination). In the last column, the Q_ϕ image is shown on a log scale to highlight the fainter parts of the disks.