Power spectra P(m), m is   
harmonic number, for the common z-distribution                 
of C IV and Mg II systems

Figure 4: Power spectra P(m), m is harmonic number, for the common z-distribution of C IV and Mg II systems (z=0.2-3.2) obtained for four trial functions indicated in each panel. Horizontal dashed lines denote confidence level b=0.99979 (3.6s).