Rotation profile of NGC 4372, where the abscissa shows the distance from the centre of the GC along the axis perpendicular to the rotation axis and the ordinate shows the mean offset from the GC’s systemic velocity in different overlapping bins. The horizontal error bars indicate the size of the selected bins, while the vertical error bars indicate the formal uncertainty of the mean velocity offset. The best fit, according to Eq. (10), is overplotted with a red line and the rotating model is shown with a black, dashed line.
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