# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.189755        0.00697601    
     0.460000          0.700000          0.207859        0.00657550    
     0.700000           1.00000          0.241871        0.00781356    
      1.00000           1.54000          0.363201         0.0119033    
      1.54000           2.40000          0.408489         0.0207161    
      2.40000           10.0000          0.276754         0.0430038