The spectral index map generated using channelized images between 0.88 and 1.65 GHz at a resolution of 11″ × 10″ (top panel). The spectral index colour bar ranges from −0.5 to −1.2. Spectral steepening is seen towards the waist of Pictor A, while the core shows a flat spectral index. The bottom panel shows errors associated with spectral index fitting, whereby higher errors are associated with the lobe edges.