# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0760398        0.00240149    
     0.460000          0.700000         0.0869004        0.00244612    
     0.700000           1.00000          0.102476        0.00299341    
      1.00000           1.54000         0.0991143        0.00312262    
      1.54000           2.40000          0.106064        0.00384074    
      2.40000           4.80000         0.0983508        0.00464192    
      4.80000           10.0000          0.104218        0.00705489