# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0181097        0.00439176    
     0.460000          0.700000         0.0161589        0.00418211    
     0.700000           1.00000         0.0123336        0.00541060    
      1.00000           1.54000         0.0171521        0.00419901    
      1.54000           2.40000         0.0329942        0.00408897    
      2.40000           4.80000         0.0284993        0.00625089    
      4.80000           10.0000         0.0152687         0.0139093