# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0247535        0.00568749    
     0.460000          0.700000         0.0380866        0.00444519    
     0.700000           1.00000         0.0416864        0.00573444    
      1.00000           1.54000         0.0423226        0.00627034    
      1.54000           2.40000         0.0341154         0.0103544    
      2.40000           4.80000         0.0394480         0.0148777    
      4.80000           10.0000         0.0201005         0.0334557