# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.348441        0.00606323    
     0.460000          0.700000          0.377266        0.00599222    
     0.700000           1.00000          0.305232        0.00784573    
      1.00000           1.54000          0.327927        0.00780500    
      1.54000           2.40000          0.318918        0.00894227    
      2.40000           4.80000          0.246642        0.00906808    
      4.80000           10.0000          0.169984         0.0110395