The catalogue of galaxies used as flow tracers in this analysis, analogous to Fig. 11 in Peñarrubia et al. (2014). The x-axis is the Local-Group-centric distance, where the centre of the LG is the centre of mass of the Milky Way-M31 pair when assuming a mass ratio of M_M31/M_MW = 2. The y-axis is the radial velocity projected in the LG-centric frame, where the offset is computed by interpolating the velocity field along the line between the two galaxies linearly. The different lines indicate spherical Kepler-like velocity models of the recession velocity (Equation (9) of Peñarrubia et al. 2014).