Spectral age maps of J2345–0449 outer double presented as color maps, with color bars representing the scales given next to each panel. Each panel is labeled from a to d in the top-right corner. In each panel a 325 MHz contour map is overlaid for reference. The contour levels are (3, 9, 39, 165)×0.7 mJy/beam. The size of the circular beam for the color and contour maps is 45″. Panel a: Spectral age map of the outer double. The gray line marks a slice through the source. The age profile, which was created this way, is shown in Fig. 7. Panel b: χ_red² map of the outer double. The regions with χ_red² > 3.32 (99% confidence interval) are marked in red. Panel c: Spectral age 1σ upper error map of the outer double. Panel d: Spectral age 1σ lower error map of the outer double.