# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.101243         0.0234085    
     0.460000          0.700000          0.108639         0.0169324    
     0.700000           1.00000          0.173151         0.0124304    
      1.00000           1.54000          0.203520        0.00572752    
      1.54000           2.40000          0.209149        0.00477114    
      2.40000           4.80000          0.188250        0.00478160    
      4.80000           10.0000          0.133931        0.00639943