# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.161895        0.00372224    
     0.460000          0.700000          0.160950        0.00361732    
     0.700000           1.00000          0.124104        0.00467237    
      1.00000           1.54000          0.111496        0.00637916    
      1.54000           2.40000          0.156869        0.00782348    
      2.40000           4.80000          0.156717        0.00839956    
      4.80000           10.0000          0.135527         0.0106599