Dependence of the derived accretion rate on the average luminosity increase ⟨ ΔL^acc ⟩ and assumed ZAMS stellar mass for the parameter range bracketing MM1. The horizontal dashed line corresponds to ⟨ ΔL^acc ⟩ and the lightgray region marks its 1σ uncertainty while the vertical dashed line and the darker gray region indicate the stellar mass and its uncertainty. The values of the accretion rate are indicated.