The stellar content of the Sagittarius Dwarf Galaxy

WepresentV,IdeepCCDphotometryforthreeelds of the dwarf galaxy in Sagittarius (Sgr), located at l=5.6 o , b=- 14.1 o . One of the elds is centered on the globular cluster NGC 6715 (M54), which lies in one of the dense clumps of the Sgr galaxy. Comparing the CMD of Sgr with those of globular clus- ters which are believed to be kinematically associated with the dwarf galaxy (Da Costa & Armandroff 1995), we conclude that the stellar population of Sgr presents a spread in metallicity of -0.71(Fe/H)-1.58, and that the dominant population ('10 Gyr old) is extremely similar to the star content of the associ- ated globular cluster Terzan 7. The estimated distance to Sgr is d'24.55 Kpc.