(Upper) Four primary parameters of the Diamondback evolutionary model grid from left to right: luminosity, effective temperature, surface gravity, and radius as a function of age (x-axis) and mass (color). Mass ranges from 0.0005 to 0.08 M_⊙ going from dark blue to gold or equivalently 0.524 M_jup to 84 M_jup. (Lower) On the left, the assumption on mass and age for the prior distribution, and on the right the interpolation of that distribution onto the four output parameters of the distribution, which forms the prior on effective temperature, surface gravity, and radius. The prior is assumed flat over the entire grid on all of the other atmospheric parameters.