Rotation velocity residuals, Δv_rot, in 5° bins in latitude, b, are shown with a thick black solid line and filled squares with error bars. Values calculated with bins of the same width, but with the first bin in the range 0°–2.5°, are shown with a grey solid line and filled circles with error bars. Δv_rot averages in bins with constant number of data points (n = 5000) are shown with a dotted line and stars with error bars.