# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.105583        0.00141692    
     0.460000          0.700000          0.112837        0.00136225    
     0.700000           1.00000          0.115059        0.00166400    
      1.00000           1.54000          0.122826        0.00193335    
      1.54000           2.40000          0.126522        0.00285072    
      2.40000           4.80000          0.124800        0.00393728    
      4.80000           10.0000          0.116976        0.00615745