# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.118575         0.0727560    
     0.460000           1.00000         0.0571619        0.00980284    
      1.00000           1.54000         0.0709588        0.00537947    
      1.54000           2.40000         0.0671255        0.00500053    
      2.40000           4.80000         0.0840967        0.00503253    
      4.80000           10.0000         0.0596424        0.00825463