# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0331068        0.00399176    
     0.460000          0.700000         0.0290521        0.00502232    
     0.700000           1.00000         0.0240602        0.00787438    
      1.00000           1.54000         0.0225302         0.0124778    
      1.54000           2.40000         0.0366478         0.0184056    
      2.40000           4.80000         0.0623384         0.0286628    
      4.80000           10.0000         0.0987724         0.0406995