# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.187072        0.00387442    
     0.460000          0.700000          0.233666        0.00435844    
     0.700000           1.00000          0.227747        0.00574281    
      1.00000           1.54000          0.278723        0.00599978    
      1.54000           2.40000          0.345988        0.00653363    
      2.40000           4.80000          0.373278        0.00695789    
      4.80000           10.0000          0.235885        0.00836375