# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000        0.00805088        0.00803751    
     0.460000          0.700000         0.0164799        0.00366187    
     0.700000           1.00000         0.0150013        0.00399394    
      1.00000           1.54000         0.0157900        0.00356687    
      1.54000           2.40000         0.0116482        0.00553298    
      2.40000           4.80000         0.0164050        0.00589822    
      4.80000           10.0000        0.00545583         0.0148913