# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0936152        0.00200695    
     0.460000          0.700000          0.110186        0.00200054    
     0.700000           1.00000          0.116327        0.00213357    
      1.00000           1.54000          0.127549        0.00209945    
      1.54000           2.40000          0.138256        0.00249149    
      2.40000           4.80000          0.141875        0.00319542    
      4.80000           10.0000          0.133459        0.00490942