Stokes Q, U, and | V | wavelength integrated maps calculated by integrating the observed Stokes profiles. The integral covered 21 wavelength samples centered on the position of maximum emission. The bottom right panel shows contour plots representing the areas where the peak amplitude of the Stokes | V | signal surpasses three and five times the noise level σ. Note that σ is pixel dependent since each Stokes parameter is normalized to its Stokes I maximum amplitude. As in Fig. 1, the bottom part represents the limb and the right axis the height in Mm.