# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0520056         0.0123430    
     0.460000          0.700000        0.00595042         0.0238992    
     0.700000           1.00000         0.0187135         0.0157533    
      1.00000           1.54000         0.0128119         0.0168847    
      1.54000           2.40000         0.0288577         0.0145005    
      2.40000           4.80000         0.0522938         0.0128143    
      4.80000           10.0000         0.0745067         0.0174023