# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.339594        0.00495096    
     0.460000          0.700000          0.337715        0.00478778    
     0.700000           1.00000          0.259080        0.00711539    
      1.00000           1.54000          0.220270        0.00674098    
      1.54000           2.40000          0.241914        0.00731263    
      2.40000           4.80000          0.209579        0.00755028    
      4.80000           10.0000          0.159011         0.0102550