# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.115464        0.00142732    
     0.460000          0.700000          0.112989        0.00144145    
     0.700000           1.00000          0.109261        0.00166879    
      1.00000           1.54000          0.102062        0.00178640    
      1.54000           2.40000         0.0990683        0.00244513    
      2.40000           4.80000         0.0989426        0.00329692    
      4.80000           10.0000         0.0979922        0.00481177