# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.118917        0.00392762    
     0.460000          0.700000          0.115112        0.00348430    
     0.700000           1.00000          0.127123        0.00409621    
      1.00000           1.54000          0.127609        0.00502847    
      1.54000           2.40000          0.128305        0.00640651    
      2.40000           4.80000          0.102392        0.00921647    
      4.80000           10.0000          0.117535         0.0127663