# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0970150        0.00436014    
     0.460000          0.700000         0.0882611        0.00318752    
     0.700000           1.00000         0.0870593        0.00384120    
      1.00000           1.54000         0.0837704        0.00308517    
      1.54000           2.40000         0.0808363        0.00314968    
      2.40000           4.80000         0.0696424        0.00304549    
      4.80000           10.0000         0.0582284        0.00367231