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Fig. 4


Results of temporal Fourier analysis. Left panel: temporal velocity power spectra Pυ,5576(ν) (dashed) and Pυ,5434(ν) (solid); thin for original power, thick after subtraction of noise level (dotted horizontal lines). Right panel: phases Z (solid) and coherences C (dashed) between the velocities in the 5576 and 5434 lines.

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