# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0239860        0.00480240    
     0.460000          0.700000         0.0131407        0.00345152    
     0.700000           1.00000         0.0149178        0.00257092    
      1.00000           1.54000        0.00613290        0.00339687    
      1.54000           2.40000         0.0148957        0.00256124    
      2.40000           4.80000         0.0115798        0.00404253    
      4.80000           10.0000         0.0145586        0.00534467