# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.101661        0.00775537    
     0.460000          0.700000          0.130434        0.00600140    
     0.700000           1.00000          0.127871        0.00635755    
      1.00000           1.54000          0.138925        0.00526841    
      1.54000           2.40000          0.133857        0.00675260    
      2.40000           4.80000          0.112655        0.00687997    
      4.80000           10.0000          0.101895        0.00729289