# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0355383         0.0145894    
     0.460000          0.700000         0.0330557         0.0122682    
     0.700000           1.00000         0.0476801         0.0110973    
      1.00000           1.54000         0.0616066        0.00950884    
      1.54000           2.40000         0.0807815         0.0117443    
      2.40000           4.80000         0.0825110         0.0141220    
      4.80000           10.0000          0.101843         0.0264998