dP/dlnT (probability for a grain to be at a certain temperature) in the case of a stochastically-heated PAH molecule (radius a = 0.765 nm) assuming a gas temperature T_gas = 10⁷ K, a gas proton density n_H = 10^-3 cm^-3 and G₀ = 1. We notice that the probability distribution in the case of dust heating due to both collisions and photon absorption (black line) is, for most of the temperatures, the sum of the probability distribution due to only photon heating (red line) and the probability distribution due to collisional heating (blue line).