Results of spectral aging analysis for individual lobes based on integrated flux densities. The scale on the frequency and flux axes is logarithmic. A summary of each model is given in Table 3. Left: Outer lobes. The JP-Tribble model was used. In order to separate the plots, the measured and modeled fluxes for the northern lobe were rescaled by a factor of 0.5. Right: Inner lobes. The JP model was used.