# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.102363        0.00122173    
     0.460000          0.700000          0.106726        0.00119593    
     0.700000           1.00000          0.110386        0.00142024    
      1.00000           1.54000          0.112894        0.00167714    
      1.54000           2.40000          0.120882        0.00242401    
      2.40000           4.80000          0.117798        0.00336633    
      4.80000           10.0000          0.114987        0.00618314