# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.131802         0.0440677    
     0.460000          0.700000         0.0406524         0.0558188    
     0.700000           1.00000         0.0704091         0.0295608    
      1.00000           1.54000         0.0576851         0.0172583    
      1.54000           2.40000         0.0446832        0.00787912    
      2.40000           4.80000         0.0292787        0.00574396    
      4.80000           10.0000         0.0305816        0.00660448