# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0139772        0.00908542    
     0.460000          0.700000         0.0121273        0.00812946    
     0.700000           1.00000         0.0156115        0.00897961    
      1.00000           1.54000         0.0146679        0.00812561    
      1.54000           2.40000         0.0509551        0.00939974    
      2.40000           10.0000        0.00316986         0.0131002