# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0242879         0.0106351    
     0.460000          0.700000         0.0266686        0.00657144    
     0.700000           1.00000         0.0297236        0.00641258    
      1.00000           1.54000         0.0262016        0.00593260    
      1.54000           2.40000         0.0215540        0.00937525    
      2.40000           4.80000         0.0245978         0.0109688    
      4.80000           10.0000         0.0414138         0.0129908