Multi-wavelength spectral-energy distributions (SEDs) from the three regions studied in the Vela X cocoon. Blue pointsare derived from X-ray measurements with the Suzaku XIS (Sect. 3), and green points from the gamma-ray measurements with H.E.S.S. (Sect. 4). Error bars combine statistical and systematic uncertainties as described in text. Top, middle, and bottom panels: extraction regions 0, 1, and 2, respectively. In the upper sub-plot of each panel, radiative models are overlaid to the SED points. In the lower subplot, the residuals for the best fit parameters are shown. The models are based on a single population of leptons producing synchrotron emission in a uniform-strength magnetic field and inverse-Compton emission on the cosmicmicrowave background and diffuse infrared radiation. The black line shows the best-fit (minimum χ²) model, while the shaded bands represent the 95% confidence level bands from the Markov chain Monte Carlo scan.