# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.215581        0.00431004    
     0.460000          0.700000          0.227692        0.00424485    
     0.700000           1.00000          0.210238        0.00586179    
      1.00000           1.54000          0.209300        0.00546891    
      1.54000           2.40000          0.204239        0.00677956    
      2.40000           4.80000          0.154015        0.00706225    
      4.80000           10.0000          0.147949        0.00873934