# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0794137        0.00586177    
     0.460000          0.700000         0.0947450        0.00535959    
     0.700000           1.00000         0.0807251        0.00892320    
      1.00000           1.54000         0.0847169         0.0115774    
      1.54000           2.40000          0.117457         0.0148373    
      2.40000           4.80000         0.0940650         0.0226303    
      4.80000           10.0000          0.140166         0.0338465