# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0507339        0.00909265    
     0.460000          0.700000         0.0520498        0.00772965    
     0.700000           1.00000         0.0180805         0.0167495    
      1.00000           1.54000         0.0318816         0.0109991    
      1.54000           2.40000         0.0503268        0.00916980    
      2.40000           4.80000         0.0302754         0.0123846    
      4.80000           10.0000         0.0389645         0.0126640