Verner, D. A., Ferland, G. J., Korista, K. T., & Yakovlev, D. G. 
1996, ApJ, in press. 
Atomic data for astrophysics. II. New analytic fits for photoionization 
cross sections of atoms and ions.
Table 1 `Fit parameters for photoionization cross sections'
Byte-per-byte description of file: photo.dat
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   Bytes Format  Units   Label        Explanations
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   1-  2  I2     ---     Z            Atomic number
   4-  5  I2     ---     N            Number of electrons
   7- 15  E9.3   eV      E_th         Subshell ionization threshold energy
  17- 25  E9.3   eV      E_max        Maximum energy 
  27- 35  E9.3   eV      E_0          Fit parameter
  37- 45  E9.3   Mb      \sigma_0     Fit parameter
  47- 55  E9.3   ---     y_a          Fit parameter
  57- 65  E9.3   ---     P            Fit parameter
  67- 75  E9.3   ---     y_w          Fit parameter
  77- 85  E9.3   ---     y_0          Fit parameter
  87- 95  E9.3   ---     y_1          Fit parameter
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