# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0963594        0.00542869    
     0.460000          0.700000         0.0912203        0.00540984    
     0.700000           1.00000         0.0803116        0.00601517    
      1.00000           1.54000         0.0716755        0.00567627    
      1.54000           2.40000         0.0507697        0.00691609    
      2.40000           4.80000         0.0567159        0.00817639    
      4.80000           10.0000         0.0362784         0.0133265