Total intensity image of NGC 4217 at C-band (same as Fig. 1, top). Gray polarized intensity contours at 3, 6, 9, 12, 15σ levels. The robust weighting parameter of clean was set to two and then smoothed to a resulting beam size of 7.7″ × 7.7″, shown in the bottom left. The arrows mark the super-bubble structure, visible here in polarized emission. Left: Polarization derived from StokesQandU maps with a σ of 4.8 μJy beam⁻¹. The apparent magnetic field orientations, not corrected for Faraday rotation, are shown in white and clipped below 3σ. Right: Polarization derived via RM-synthesis with a σ of 4.7 μJy beam⁻¹. The intrinsic magnetic field orientations, corrected for Faraday rotation, are shown in white and clipped below 3σ.