Gaussian best fits of the normalised relative error distribution on the measured temperature for different input map weighting scheme for cluster C4. The red solid curve indicates the emission-weighted best fit of the distribution (μ_ΔT = −8.0%, σ_ΔT = 3.4%). The blue dash-dotted line indicates the spectroscopic temperature best fit (μ_ΔT = −1.2%, σ_ΔT = 2.2%), while the dotted violet line indicates the best fit for a mass-weighted input (μ_ΔT = −5.2%, σ_ΔT = 7.2%).