Rotation diagrams of the spectrally unresolved CO rovibrational absorption spectra (﹩v=0\to 2﹩) for IRAS 03445+3242. The squares represent the observed column densities of R- (red squares) and P-branch (blue squares) transitions, divided by statistical weights (﹩{N}_{J}/{g}_{J}﹩). The vertical bars indicate the 1σ error. Top: the rotation diagram is fit with two distinct cold (blue line) and warm (red line) components. The column density and gas temperature of each component for the best-fit model are presented as the same colors on the panel. The black solid line indicates the sum of the two components. Bottom: the rotation diagram is fit with a power-law model (﹩{dN}\propto {T}^{-\alpha }{dT}﹩). The column density, the maximum and minimum temperatures, and the power index of the best-fit model are presented in the panel.