Trajectory of the GRG lobes of DA240 (open blue circles), in the U_e/U_B vs. U_e/U_CMB plane is shown for decreasing values of p₁ from 10³ to 1 as in Table 1. The positions of DA 240 (filled blue circle), 3C 35 (blue filled square) and 3C 326 (blue filled triangles) for p₁ = 10 are also shown. The shaded areas show the regions of Compton (radiation) dominance (P_ICS > P_synch or U_B < U_CMB: cyan) and synchrotron (B-field) dominance (P_ICS < P_synch or U_B > U_CMB: yellow) for the single particle limit. The equipartition lines U_e = U_B, U_e = U_CMB and U_B = U_CMB are also shown for comparison. The magenta dots show the RG lobes analyzed by Croston et al. (2005) assuming p₁ = 10 and α = 2: filled magenta dots refer to lobes with reliable X-ray spectral estimates (see text for discussion).