Histogram of the difference of the ϵ₁ component of the ellipticity measured by the two shape measurement algorithms, lensfit and DEIMOS, on a common sub-sample of galaxies, after applying the m-bias correction as described in the text. The ϵ₂ component shows the same behaviour. The distribution is more peaked than a Gaussian (red dashed line) and is best described by a Student’s t-distribution with ν = 4.3, and a width σ = 0.08 with zero mean (black solid line).