# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0313528        0.00432392    
     0.460000          0.700000         0.0272541        0.00468175    
     0.700000           1.00000         0.0352392        0.00561855    
      1.00000           1.54000         0.0295971        0.00679321    
      1.54000           2.40000         0.0392834        0.00864578    
      2.40000           4.80000         0.0291079         0.0151700    
      4.80000           10.0000         0.0150481         0.0363524