# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.163130        0.00357107    
     0.460000          0.700000          0.167974        0.00326040    
     0.700000           1.00000          0.170864        0.00318224    
      1.00000           1.54000          0.164314        0.00262349    
      1.54000           2.40000          0.149924        0.00268421    
      2.40000           4.80000          0.130004        0.00325532    
      4.80000           10.0000          0.103394        0.00394703