# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0418901         0.0103672    
     0.460000          0.700000         0.0493342        0.00870325    
     0.700000           1.00000         0.0333020         0.0130959    
      1.00000           1.54000         0.0783424         0.0109004    
      1.54000           2.40000         0.0475408         0.0164677    
      2.40000           4.80000         0.0284151         0.0304683    
      4.80000           10.0000         0.0606561         0.0482812