Posterior distributions of the mass and concentration obtained for a fit to Abell 1689 using SZ, X-ray SB, and temperature, and WL data assuming a triaxial geometry (in green, labeled M_{200c, triax} and c_{200c, triax}) and using only WL data, assuming a spherical geometry (in purple, labeled M_200c, sph and c_200c, sph). The 68% credible regions for the two results are color-filled in the bottom left subplot. The log normal prior we applied to c_200c, which depends on mass, is marginalized over the 68% credible bounds of M_{200c, triax} and plotted in blue in the lower right subplot. Note that the prior is strongly informative and the upper edges of the posterior distributions for c_200c are largely set by it.