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Fig. C.1


Merged X-ray spectrum (ACIS-S) of the cluster sample with residuals of different fitted models. Fitted XSPEC models: apec+apec+zgauss (3.55 keV) +zgauss (3.85 keV) +zgauss (4.7 keV) with best-fit (Bf), upper and lower confidence values (99.7 per cent) of the Gaussian flux at 3.55 keV in counts cm-2 s-1. The annotations show the best-fit value and the confidence interval obtained using MCMC. Residuals are shown for the fit with upper (blue) and lower (red) confidence limit of the 3.55 keV Gaussian flux. For the effective area curve, see Fig. B.1.

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