# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0280510        0.00148400    
     0.460000          0.700000         0.0305107        0.00145198    
     0.700000           1.00000         0.0301055        0.00160738    
      1.00000           1.54000         0.0279961        0.00176450    
      1.54000           2.40000         0.0338017        0.00208409    
      2.40000           4.80000         0.0357179        0.00250673    
      4.80000           10.0000         0.0325345        0.00357658