# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.452974        0.00214387    
     0.460000          0.700000          0.457207        0.00211361    
     0.700000           1.00000          0.489561        0.00256139    
      1.00000           1.54000          0.462172        0.00279612    
      1.54000           2.40000          0.420221        0.00324621    
      2.40000           4.80000          0.321685        0.00390454    
      4.80000           10.0000          0.230763        0.00469598