# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0779320        0.00308401    
     0.460000          0.700000         0.0957954        0.00326018    
     0.700000           1.00000          0.101556        0.00359774    
      1.00000           1.54000         0.0989748        0.00357228    
      1.54000           2.40000          0.138676        0.00496393    
      2.40000           4.80000          0.133026        0.00630157    
      4.80000           10.0000          0.145942         0.0102270