Normalized cumulative gas mass versus entropy as derived with the isobaric model (light blue shaded region) and single temperature modeling of spatially resolved spectra from the ACCEPT archive of Chandra data (red shaded region). The distributions are normalized by dividing by the total gas mass. We show, as a filled circle the value of the entropy obtained from a single temperature analysis of our spectra. The gray vertical box corresponds to K = 30 − 33 keV cm². Note that only CC objects are expected to have mass distributions extending below this entropy. Data for A4038 and MKW3s are shown respectively in the top and bottom panels.