ULTRAVIOLET IMAGING TELESCOPE - GLOBULAR-CLUSTERS IN M31

Two 40' fields of M31 observed with the Ultraviolet Imaging Telescope (UIT) during the Astro-1 mission in 1990 December are searched for kno wn globular clusters. The flux of 20 clusters in the nucleus field and 23 clusters in the disk field are measured in a near ultraviolet (NUV approximately 2500 angstrom) bandpass. In the far-ultraviolet (FUV ap proximately 1500 angstrom), only four clusters are detected with certa inty, and six others are possible detections. The NUV photometry of th e M31 globulars that are detected by UIT do not have a UV excess in co mparison to their Galactic counterparts. The spectral energy distribut ions of the globular clusters from the NUV to V fall within the range of predictions of the Buzzoni models for a 15 Gyr old population. Howe ver, two of the three classical globular clusters with red NUV and vis ible colors that are detected in the FUV have a ''UV upturn'' with flu xes that are greater in the FUV than in the NUV. The other seven FUV d etections have optical colors that are too blue for classical globular clusters and are probably the nuclei of compact OB associations.