# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.111624        0.00280605    
     0.460000          0.700000          0.120063        0.00247749    
     0.700000           1.00000          0.130813        0.00323981    
      1.00000           1.54000          0.129373        0.00315157    
      1.54000           2.40000          0.128926        0.00345671    
      2.40000           4.80000          0.116935        0.00464428    
      4.80000           10.0000          0.106058        0.00730016