# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.565955        0.00447885    
     0.460000          0.700000          0.573457        0.00437740    
     0.700000           1.00000          0.602772        0.00564926    
      1.00000           1.54000          0.672620        0.00913436    
      1.54000           2.40000          0.662870         0.0144302    
      2.40000           4.80000          0.575123         0.0214957    
      4.80000           10.0000          0.435608         0.0398691