# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0542529        0.00643856    
     0.460000          0.700000         0.0712946        0.00581921    
     0.700000           1.00000         0.0934704        0.00740370    
      1.00000           1.54000         0.0808321        0.00748692    
      1.54000           2.40000         0.0828144        0.00948913    
      2.40000           4.80000          0.104981         0.0128537    
      4.80000           10.0000         0.0494938         0.0211916