Distribution of the average v_GV and its dispersion σ_vGV in the Galactic longitude bins and for different photometric metallicity cuts. The blue points represent the final dynamical dataset, and the red squares stand for RR Lyrae variables with r_apo < 3.5 kpc (labeled BLG in the legend). The dashed lines trace the v_GV and σ_vGV from the bar model of Shen et al. (2010) for b = 4 deg. For this figure, we use equally spaced bins between ℓ = (−8.0; 8.25) deg with a step of 1.25 deg. The asymetric distribution in ℓ was driven by our RR Lyrae dataset.