# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.185843        0.00459627    
     0.460000          0.700000          0.199980        0.00461409    
     0.700000           1.00000          0.148512        0.00598305    
      1.00000           1.54000          0.167742        0.00692628    
      1.54000           2.40000          0.200758        0.00731573    
      2.40000           4.80000          0.187491        0.00727659    
      4.80000           10.0000          0.133257         0.0108298