# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0548203        0.00976399    
     0.460000          0.700000         0.0465804        0.00760657    
     0.700000           1.00000         0.0476260        0.00653079    
      1.00000           1.54000         0.0419224        0.00692390    
      1.54000           2.40000         0.0553278        0.00699157    
      2.40000           4.80000         0.0293693         0.0145049    
      4.80000           10.0000         0.0536866         0.0173262