# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0466568         0.0105166    
     0.460000          0.700000        0.00746371         0.0152146    
     0.700000           1.00000         0.0486793        0.00621239    
      1.00000           1.54000         0.0531583        0.00560389    
      1.54000           2.40000         0.0221194         0.0129743    
      2.40000           4.80000         0.0335232         0.0118895    
      4.80000           10.0000         0.0664852         0.0135685