# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000        0.00873862        0.00761221    
     0.460000          0.700000        0.00979079        0.00609369    
     0.700000           1.00000         0.0156106        0.00773684    
      1.00000           1.54000         0.0170991        0.00670951    
      1.54000           2.40000         0.0219438        0.00420295    
      2.40000           4.80000         0.0251353        0.00262957    
      4.80000           10.0000         0.0204013        0.00245093