Thermal X-ray spectra for run 3S1-hr. The time sequence of the labels is1st WR (black), 1st SN (blue), 1st X-ray-max (violet), and fading SB(red). They refer to the descriptions in Table 2. A supernova inside a superbubble first increases the hard X-rays and then the softer parts by up to two orders of magnitude compared to immediately before the explosion. All the spectra reflect the multi-temperature structure.