# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0424476        0.00429249    
     0.460000          0.700000         0.0481582        0.00265925    
     0.700000           1.00000         0.0498715        0.00250805    
      1.00000           1.54000         0.0479451        0.00220525    
      1.54000           2.40000         0.0606197        0.00260640    
      2.40000           4.80000         0.0580757        0.00316765    
      4.80000           10.0000         0.0564900        0.00442324