# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0807441        0.00181793    
     0.460000          0.700000         0.0879038        0.00191581    
     0.700000           1.00000         0.0876841        0.00239254    
      1.00000           1.54000          0.100673        0.00278279    
      1.54000           2.40000          0.113070        0.00384306    
      2.40000           4.80000          0.117512        0.00556296    
      4.80000           10.0000          0.144320        0.00954245