# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.158399        0.00848532    
     0.460000          0.700000          0.151322        0.00645944    
     0.700000           1.00000          0.139141        0.00648831    
      1.00000           1.54000          0.125937        0.00587365    
      1.54000           2.40000          0.143008        0.00733187    
      2.40000           4.80000          0.125983        0.00906778    
      4.80000           10.0000          0.102718         0.0143223