# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.260901        0.00455300    
     0.460000          0.700000          0.252784        0.00452762    
     0.700000           1.00000          0.229930        0.00496671    
      1.00000           1.54000          0.217800        0.00466982    
      1.54000           2.40000          0.207833        0.00535016    
      2.40000           4.80000          0.178464        0.00624371    
      4.80000           10.0000          0.128444        0.00809994