# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.103376        0.00226817    
     0.460000          0.700000         0.0894998        0.00185361    
     0.700000           1.00000         0.0808440        0.00211700    
      1.00000           1.54000         0.0668385        0.00216666    
      1.54000           2.40000         0.0526474        0.00252487    
      2.40000           4.80000         0.0393619        0.00326491    
      4.80000           10.0000         0.0324910        0.00443000