# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0422296        0.00528996    
     0.460000          0.700000         0.0302389        0.00443103    
     0.700000           1.00000         0.0312515        0.00563856    
      1.00000           1.54000         0.0258985        0.00419360    
      1.54000           2.40000         0.0247290        0.00454812    
      2.40000           4.80000         0.0124766        0.00653469    
      4.80000           10.0000         0.0210027        0.00650582