# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0252790        0.00879178    
     0.460000          0.700000         0.0158698        0.00798669    
     0.700000           1.00000         0.0187828         0.0105675    
      1.00000           1.54000         0.0303188        0.00587012    
      1.54000           2.40000         0.0259408        0.00503572    
      2.40000           4.80000        0.00570768        0.00590913    
      4.80000           10.0000        0.00888718        0.00541830