# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0707928        0.00338198    
     0.460000          0.700000         0.0803446        0.00291463    
     0.700000           1.00000         0.0858368        0.00431802    
      1.00000           1.54000         0.0773357        0.00407896    
      1.54000           2.40000         0.0842057        0.00439696    
      2.40000           4.80000         0.0785095        0.00505336    
      4.80000           10.0000         0.0674020        0.00681940