Same as Fig. 1, but for the case of IGR J17544-2619 observation 0154750601. An adaptive rebinning achieving S/N> 11 in each soft time bin was used to compute the HR before filtering the light curves for the high flaring background. Only the time intervals marked with a red solid line in the fourth panel from the top could be used for the spectral analysis, due to the high flaring background that affected the rest of the observation.