# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.206295        0.00403524    
     0.460000          0.700000          0.220810        0.00355921    
     0.700000           1.00000          0.243500        0.00433251    
      1.00000           1.54000          0.372994        0.00700732    
      1.54000           2.40000          0.428703         0.0123977    
      2.40000           4.80000          0.396668         0.0220530    
      4.80000           10.0000          0.587953         0.0476421