# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0699914        0.00293820    
     0.460000          0.700000         0.0686565        0.00268831    
     0.700000           1.00000         0.0737994        0.00279954    
      1.00000           1.54000         0.0695383        0.00225184    
      1.54000           2.40000         0.0646632        0.00264694    
      2.40000           4.80000         0.0583123        0.00284439    
      4.80000           10.0000         0.0483095        0.00425888