# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.128676        0.00325170    
     0.460000          0.700000          0.138221        0.00304349    
     0.700000           1.00000          0.135408        0.00406142    
      1.00000           1.54000          0.136556        0.00440560    
      1.54000           2.40000          0.135991        0.00550224    
      2.40000           4.80000          0.129993        0.00685744    
      4.80000           10.0000          0.119771         0.0101993