Top: fractional polarization (FPOL = P/I) images of the radio halo, R1a, as expected at a resolution of 10″, 30″, 50″, and 100″. Contour levels refer to the corresponding total intensity emission which are convolved at the same resolution. Bottom: the azimuthally averaged radio-halo brightness profile of the fractional polarization at full resolution (solid line) is compared with the profiles at a resolution of 10″ (long dashed line), 30″ (short dashed line), 50″ (dot dashed line), and 100″ (dotted line).