Summary of the results for δc_gas obtained in this work for different choices of overdensity ratio f in supercluster identification, cluster mass proxy, and mass range. The results for f = 10 and f = 50 are plotted in cyan and purple, respectively, to show the increasing trend in δc_gas with f. The two measurements for the total mass concentration obtained from weak-lensing analysis, $\delta c_{\mathrm{tot}}=0.{149}_{-0.137}^{+0.109}$ for f = 10 and $\delta c_{\mathrm{tot}}=0.{217}_{-0.149}^{+0.143}$, are not shown in this plot because they are much larger than the gas mass concentration results.