Total power and polarized intensity maps of the combined VLA and Effelsberg data at λ3.6 cm and λ6.2 cm at 15′′ resolution. The pointing centre of the VLA maps is marked with a black cross. Vectors show the orientation of E + 90°, which are not corrected for Faraday rotation of the foreground. A vector-length of 1′′ corresponds to a polarized intensity of 0.01 mJy, they are cut off at 3σ_PI. The range of RM between about −200 rad/m² and +100 rad/m² (see Fig. 5) corresponds to rotation angles −15° to + 7.5° at 3.6 cm and −44° to + 22° at 6.2 cm. The depicted map size is ~ 9′ × 9′. Contours of the total power maps range from 90 to 890 μJy/beam in steps of 100 μJy/beam on a logarithmic colour-scale. Contours of the polarized intensity maps range from 20 to 100 μJy/beam in steps of 20 μJy/beam on a linear colour scale.