# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0383585         0.0110485    
     0.460000          0.700000         0.0428128         0.0102932    
     0.700000           1.00000         0.0329737         0.0116168    
      1.00000           1.54000         0.0483297        0.00711396    
      1.54000           2.40000         0.0634178        0.00567169    
      2.40000           4.80000         0.0474632        0.00429512    
      4.80000           10.0000         0.0256667        0.00507785