# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0798698         0.0165119    
     0.460000          0.700000         0.0288444         0.0204353    
     0.700000           1.00000         0.0236734         0.0186047    
      1.00000           1.54000          0.104118         0.0118244    
      1.54000           2.40000          0.278599         0.0102151    
      2.40000           4.80000          0.180673        0.00558939    
      4.80000           10.0000          0.124864        0.00459498