# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0865491        0.00258196    
     0.460000          0.700000          0.101905        0.00249405    
     0.700000           1.00000         0.0970943        0.00308003    
      1.00000           1.54000          0.102082        0.00302680    
      1.54000           2.40000          0.106202        0.00361890    
      2.40000           4.80000          0.108994        0.00469318    
      4.80000           10.0000         0.0933646        0.00723604