Position of XLSSC 116 in the soft-band luminosity versus temperature plane (red dot with error bars). Grey points are measurements from the 100 brightest cluster sample (Giles et al. 2016, hereafter Paper III). The straight line represent the scaling relation from Paper III fitted to the 100 sample (forced to self-similar evolution). Black dots with error bars correspond to the two-component APEC fit to the cluster spectrum, possibly indicating the presence of two structures. The low temperature point has no temperature error-bar because we cannot constrain it owing to the small number of photons.