# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0871981        0.00481676    
     0.460000          0.700000         0.0730239        0.00363333    
     0.700000           1.00000         0.0690888        0.00471971    
      1.00000           1.54000         0.0756214        0.00334635    
      1.54000           2.40000         0.0662340        0.00354633    
      2.40000           4.80000         0.0656012        0.00300592    
      4.80000           10.0000         0.0444858        0.00387583