X-ray spectra (ACIS-I and ACIS-S) with residuals of different fitted models. Fitted models: XSPEC phabs*(apec+apec+zgauss) with best-fit, upper and lower confidence values (99.7 per cent) of the Gaussian flux in cm-2 s-1. The annotations show the best-fit (Bf) value and the confidence interval obtained using Monte Carlo Markov chains (MCMC). Residuals are shown for the fit with upper (blue) and lower (red) confidence limit of the Gaussian flux. The plot title indicates the abbreviated cluster name and the exposure time of the observation.
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