# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0623164        0.00484118    
     0.460000          0.700000         0.0792404        0.00574653    
     0.700000           1.00000         0.0627483        0.00913495    
      1.00000           1.54000         0.0730558        0.00905830    
      1.54000           2.40000          0.100675         0.0102397    
      2.40000           4.80000          0.172410         0.0111207    
      4.80000           10.0000          0.180610         0.0154650