# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0558032        0.00404627    
     0.460000          0.700000         0.0717114        0.00374227    
     0.700000           1.00000         0.0837612        0.00505651    
      1.00000           1.54000         0.0941447        0.00511048    
      1.54000           2.40000          0.105266        0.00675254    
      2.40000           4.80000         0.0825792        0.00935011    
      4.80000           10.0000          0.112750         0.0173844