# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000        0.00355611        0.00387915    
     0.460000          0.700000        0.00609469        0.00302600    
     0.700000           1.00000        0.00774732        0.00322336    
      1.00000           1.54000         0.0127037        0.00251848    
      1.54000           2.40000         0.0118431        0.00381090    
      2.40000           10.0000        0.00289174        0.00740524