# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.388830        0.00590570    
     0.460000          0.700000          0.420845        0.00584073    
     0.700000           1.00000          0.341226        0.00760262    
      1.00000           1.54000          0.410584        0.00758069    
      1.54000           2.40000          0.437529        0.00866601    
      2.40000           4.80000          0.367794        0.00872919    
      4.80000           10.0000          0.239889         0.0102565