Polarised light in the close environment of W Hya in filters NR, cnt748, and cnt820. Upper panels: colour maps showing the percentage polarisation degree observed toward W Hya in filters NR, cnt748, and cnt820 (from left to right). The red contours show the 2% level of the polarisation degree below which instrumental polarisation can dominate. Bottom panels: grey-scale maps showing the polarisation angle in degrees with respect to the north direction measured in filters NR, cnt748, and cnt820 (from left to right).