Spectrum of the jet in region R2. The diamonds denote the flux densities of the detections, and the arrows the 3σ upper limits for the non-detections. The circles are estimates based on the measurements of Croston et al. (2003). The best-fit synchrotron model from a broken power-law EED is also plotted. The predicted IC/CMB and SSC X-ray flux densities assuming equipartition are shown as the dotted and dash-dotted lines, respectively.