Spectral index map between 5.5 and 9 GHz at resolution 3″ × 2″ (left) and associated error map (right). Contour levels are those of the lower frequency radio map. The core has an inverted spectral index α ≃ −0.5. Jets have 0.5 ≤ α ≤ 1. Primary lobes have α ≃ 1.5. The inner regions of the wings have 1.5 ≤ α ≤ 2.5.
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