1 INTRODUCTION  
2 OBSERVATIONS  
3 ATMOSPHERIC MODELS AND FITTING  
3.1 Atmospheric parameters  
4 COMPARISON OF THE COS ATMOSPHERIC PARAMETERS WITH PREVIOUS STUDIES  
4.1 Comparison with spectroscopic studies  
4.2 Comparison with photometric studies  
5 MASS DISTRIBUTION  
5.1 Mass distribution variation with distance and reddening  
5.2 Mass distribution comparison with different studies  
6 OUTLIERS  
6.1 Poor fits to COS spectra  
6.2 Photometric and spectroscopic outliers  
6.3 Known binaries  
7 DISCUSSION  
8 CONCLUSION