# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.332236        0.00404420    
     0.460000          0.700000          0.329874        0.00398472    
     0.700000           1.00000          0.308086        0.00546731    
      1.00000           1.54000          0.295746        0.00510694    
      1.54000           2.40000          0.274049        0.00628707    
      2.40000           4.80000          0.217847        0.00645494    
      4.80000           10.0000          0.141202        0.00779575