These are model atmospheres computed with the ATLAS9 program.  Each model
is the result of a "minigrid" calculation were each model was started from 
the previous model with one or two depths in log tau Ross (.125 or .250)
added at the bottom.  Models were computed until the new model failed or 
depth 2371000 was reached.  The models failed most often because they do 
not like to pass out of a convection zone downward and become radiative.  
The models assume there is no flux below 9 nm.  At high temperature that 
may not be the case.  The line opacities were not pretabulated above
200000K.  The equation of state for iron group ions is incomplete above
150000K because it does not include high enough stages of ionization.