# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.268090          0.143681    
     0.460000          0.700000          0.205200         0.0827778    
     0.700000           1.00000          0.169800          0.112900    
      1.00000           1.54000          0.100117          0.152806    
      1.54000           2.40000          0.351735         0.0398877    
      2.40000           4.80000          0.323822         0.0167258    
      4.80000           10.0000          0.253681         0.0128711