# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.700000         0.0222544         0.0537725    
     0.700000           1.00000         0.0558426         0.0346469    
      1.00000           1.54000         0.0173835         0.0222076    
      1.54000           2.40000         0.0374318        0.00561038    
      2.40000           4.80000         0.0565638        0.00374574    
      4.80000           10.0000         0.0494596        0.00514180