# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.205509        0.00422677    
     0.460000          0.700000          0.217082        0.00435037    
     0.700000           1.00000          0.220685        0.00564825    
      1.00000           1.54000          0.227254        0.00544765    
      1.54000           2.40000          0.202063        0.00673394    
      2.40000           4.80000          0.175841        0.00720887    
      4.80000           10.0000          0.115605        0.00996127