# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000           1.00000         0.0285159        0.00733841    
      1.00000           1.54000         0.0314534         0.0175321    
      1.54000           2.40000         0.0477847        0.00965135    
      2.40000           4.80000         0.0485377        0.00674627    
      4.80000           10.0000         0.0339870        0.00896247