# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.190488         0.0309894    
     0.460000          0.700000         0.0529758         0.0242626    
     0.700000           1.00000         0.0517756        0.00783577    
      1.00000           1.54000         0.0645334        0.00297285    
      1.54000           2.40000         0.0658554        0.00260354    
      2.40000           4.80000         0.0659423        0.00270609    
      4.80000           10.0000         0.0644702        0.00419996