CCD BVRI PHOTOMETRY OF A REGION IN BAADE WINDOW

We obtained CCD BVRI frames of a region in Baade's Window for which we have previously conducted a very extensive infrared study (Ruelas-May orga & Teague 1992a) with the idea of studying the properties of these stars in the shorter wavelength interval and of comparing with the IR study mentioned above. We present preliminary results of this study i n the form of magnitude-colour and colour-colour diagrams. We note tha t there are at least two different sequences of stars; one that is bri ght and extends towards the blue (disc) and another one fainter and re dder (bulge). The width of the sequences on the colour-colour diagrams varies as a function of colour and may denote a change and/or a sprea d of metallicity.