# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0841194        0.00413681    
     0.460000          0.700000         0.0931528        0.00399969    
     0.700000           1.00000         0.0928457        0.00451589    
      1.00000           1.54000          0.103999        0.00594858    
      1.54000           2.40000          0.112744        0.00798706    
      2.40000           4.80000          0.145385         0.0111124    
      4.80000           10.0000          0.177807         0.0186478