The files lehego* contain spectral energy distributions calculated by Leitherer,
Heckman, and Goldader using the method described in Leitherer & Heckman (1995).
Each file has 7 columns:
column 1:  time in years
column 2:  energy in eV
column 3:  logarithm of the total flux (stellar + nebular) in photons/sec/eV
column 4:  same as 3, but for the stellar flux only
column 5:  same as 3, but for the nebular flux only
column 6:  wavelength in Angstroms (conversion of column 2)
column 7:  same as 3, but in units of erg/sec/A.

One complete spectrum from the minimum to the maximum wavelength extends over
225 lines. The time range is 1 to 25 Myr, at intervals of 1 Myr. Note that
the energy distributions have been smoothed over time. Differences with respect
to Leitherer & Heckman (1995) are a result of different smoothing parameters.

There are 24 files. Each file contains the results for a different 
star-formation history, IMF and metal abundance. The lower cut-off mass is
1 M and the star-formation rates and total masses are 1 M/yr and 10^6 M for
the continuous and instantaneous case, respectively.

The filename identifies the corresponding model. The nomenclature is
lehego_met_imf_mup_x, where

met = m10 - metallicity of minus 1.0 (i.e. 0.1 solar)
      m06                  minus 0.6 (i.e. 0.25 solar)
      p00                  plus  0.0 (i.e. solar)
      p03                  plus  0.3 (i.e. 2 solar)

imf = 235 - IMF slope of 2.35
      330                3.30

mup = 100 - cut-off mass of 100
       30                    30

x   = b - instantaneous burst
      c   continuous star formation