Temporal evolution of the coronal emission from integration over the whole computational domain. Panel a: X-ray emission as seen by XRT in the Al-poly filter. Panel b: EUV emission as it would be seen by AIA in the 171 Å channel. The vertical dashed lines indicate the time-span used for time averaging. The colors represent the different runs as indicated in the legend (cf. Table 1). See Sect. 4.4.