# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0719226        0.00829425    
     0.460000          0.700000         0.0707757        0.00807222    
     0.700000           1.00000         0.0600407        0.00882205    
      1.00000           1.54000         0.0887433         0.0104016    
      1.54000           2.40000         0.0914630         0.0128137    
      2.40000           4.80000         0.0576715         0.0162420    
      4.80000           10.0000         0.0928371         0.0242542