# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.322811        0.00331433    
     0.460000          0.700000          0.330559        0.00313101    
     0.700000           1.00000          0.363362        0.00398534    
      1.00000           1.54000          0.375195        0.00491941    
      1.54000           2.40000          0.371913        0.00597535    
      2.40000           4.80000          0.322087        0.00623273    
      4.80000           10.0000          0.247254        0.00808700