# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.148008        0.00536502    
     0.460000          0.700000          0.154980        0.00535385    
     0.700000           1.00000          0.159183        0.00730123    
      1.00000           1.54000          0.284104         0.0118785    
      1.54000           2.40000          0.358694         0.0172909    
      2.40000           4.80000          0.218903         0.0356387    
      4.80000           10.0000          0.228628         0.0759936