Broad band X-ray spectra of M31 sources with BeppoSAX

We present the first spectral study of the X-ray emitting stellar sources i n M31 in the energy band from similar to 0.1 to 10 keV. We find that the gl obular cluster sources have spectral characteristics consistent with those of the Milky Way object, namely that the spectrum can be described by a the rmal model with similar to 6-20 keV from similar to 2 to 10 keV. Evidence o f high absorption in some of these sources is most likely an indication tha t they lie in or behind the HI ring in the disk of the galaxy. We also find one peculiar globular cluster source, with spectral characteristics more t ypically associated with either High Mass X-ray Binaries or black hole cand idates. We therefore suggest that either the source has been wrongly identi fied with a globular cluster or that the system contains a Black Hole. We confirm earlier report that the spectrum of the bulge of M31 is consiste nt with the superposition of many LMXB spectra. It is likely that a large f raction of the similar to 15-30 keV detection obtained from the PDS instrum ent is associated with the bulge, thus extending the spectral data for this complex of sources up to similar to 30 keV. The high energy part of the sp ectrum can be parameterized with typical LMXB spectra, while at low energie s an additional component is required. No significant variability is observed within the BeppoSAX observation, whi le a few sources appear to have varied (brightened) since ROSAT and Einstei n observations.