Comparison of modelling results of Vela X with the observed data at different emission regions of r = 6 arcmin (dark-yellow line), r = 15 arcmin (red line), and r = 48 arcmin (blue line), as well as the total flux (black line). Left panel: modelling SEDs from radio to γ-ray bands. Right panel: modelling SEDs in the γ-ray band. The dash-dotted lines are the unabsorbed spectra, and the solid lines consider γ-ray attenuation by the SNR photon fields. The observed data are taken from Abdo et al. (2010) for radio band (black, full circles), Mattana et al. (2011) and Mangano et al. (2005) for X-rays of the inner regions of r = 6 arcmin (dark-yellow, solid thick line) and r = 15 arcmin (red, solid thick line), Grondin et al. (2013), Ajello et al. (2017), and Tibaldo et al. (2018) for GeV γ-rays (black, open circles), and Abramowski et al. (2012) for TeV γ-rays emission within r = 48 arcmin (blue, full circles), respectively.