# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0572026        0.00449938    
     0.460000          0.700000         0.0711280        0.00496060    
     0.700000           1.00000         0.0754084        0.00686138    
      1.00000           1.54000         0.0990302        0.00682319    
      1.54000           2.40000          0.119027        0.00730537    
      2.40000           4.80000          0.124537        0.00779959    
      4.80000           10.0000          0.102259         0.0102157