# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0915811        0.00168503    
     0.460000          0.700000         0.0961667        0.00148973    
     0.700000           1.00000         0.0956186        0.00178073    
      1.00000           1.54000         0.0964841        0.00163247    
      1.54000           2.40000         0.0936030        0.00187463    
      2.40000           4.80000         0.0977074        0.00205923    
      4.80000           10.0000         0.0869179        0.00319881