Free-free (left) and synchrotron emission (right) from NGC 6946 at 3.5 cm (top) and 20 cm (bottom). The angular resolution is 18″ (shown in the lower left corner of the panels) with a grid size of 6″. The bars at the right of the images show the intensity values in mJy/beam. Note that the areas are not the same at 20 cm and 3.5 cm due to their different observed fields. At 20 cm the synchrotron emission is overlaid with contours of linearly polarized intensity (Beck & Hoernes 1996). The contour levels are 70, 120, 160 μJy/beam.