where I(t) is the laser irradiance, Cel and CG/K are the heat capacity of electrons and G/K-phonons respectively, T0 is room temperature, and τ = 2.4 ps is the measured decay rate of optical phonons into low-energy phonons through anharmonicity. I(t), Γe−ph(Tel, TG/K), and Γph−ph(TG, TK) contain adjustable parameters to fit experimental results (see supplementary for details). Combining ARPES and Raman results constrains the fits so that the same adjustable parameters have to describe the ARPES and the Raman data. Specifically, having to obtain the ARPES simulation close to the experiment constrains Cel.