M31 XMM-Newton AstroSat UVIT source catalogue

Apart from foreground stars (23) and "hard" sources (13), sources located in globular clusters (6) are most numerous among the sources with UV counterpart that give a statistically acceptable fit with our simple models. We used the UVIT data together with XMM-Newton optical monitor data to investigate spectral energy distributions of the sources. This allowed us to suggest classifications for sources that were just classified as "hard" sources in previous studies.

We updated the classification of 24 out of the 291 XMM-Newton source with UVIT counterparts. The list thus contains (including candidates of each class): 105 foreground stars, 22 globular clusters, 11 supernova remnants, nine X-ray binaries, of which six are suggested as high-mass X-ray binary candidates, eight galaxies, eight AGN, seven supersoft source candidates, two sources that are either an X-ray binary or a galaxy and another one that is either a galaxy or a globular cluster. 107 sources can still only be classified as "hard", while nine remain without any classification.