# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0356005        0.00637254    
     0.460000          0.700000         0.0392250        0.00548661    
     0.700000           1.00000         0.0371008        0.00623979    
      1.00000           1.54000         0.0436273        0.00526374    
      1.54000           2.40000         0.0674424        0.00651062    
      2.40000           4.80000         0.0605763         0.0106267    
      4.80000           10.0000         0.0779720         0.0188076