Stereographic projection of Stokes I, Q, and U parameters(from left to right) from Planck observations showing the large view around the C.2 shell as traced by the ochre circle. A grid of Galactic coordinates is shown in the left panel with steps of 5° both in longitude (between −5° and +35°) and in latitude (between −40° and −5°). In all three panels Stokes I contours at 0.5, 0.6 and 1 MJy sr⁻¹ are shown.