Comment on “Coincidence studies of He ionized by ${\mathrm{C}}^{6+}$, Au${}^{24+}$, and Au${}^{53+}$”

In a recent article, McGovern et al. [Phys. Rev. A 81, 042704 (2010)] suggested that the normalization of our measured fully differential cross section for ionization of helium by Au${}^{53+}$ needs to be checked. In this comment we confirm that the normalization of the published data is correct. Furthermore, we point out that, for a conclusive comparison between experiment and theory, an accurate inclusion of the experimental resolution using correct experimental parameters in the calculation is important.