A CATALOG OF BLUE AND RED SUPERGIANTS IN M33

We present a catalog of blue and red stars in M33 based on photographic photometry of over 65,000 objects extracted from plates taken with the 3.6 m Canada-France-Hawaii Telescope (CFHT) and the 2.0 m Rozhen (Bulgarian) Telescope. The completeness limit of the various surveys are estimated here to be V = 19.5 mag for those star's situated in crowded associations, and V = 20.0 mag for stars in the interarm fields. We list magnitudes and positions for 2112 blue stars, defined by ( U - V) < 0.0 mag, (U - B) < 0.0 mag, and V < 19.5 mag, and 389 red stars defined by (B - V) > 1. 8 mag and V < 19.5 mag. Of these, 1156 are candidate 0 stars on the basis of (U - V) < -0.9 mag.