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We have obtained a deep 8-field XMM-Newton mosaic of M33 covering the galaxyout to the D$_{25}$ isophote and beyond to a limiting 0.2--4.5 keV unabsorbedflux of 5$\times$10$^{-16}$ erg cm$^{-2}$ s$^{-1}$ (L${>}$4$\times$10$^{34}$erg s$^{-1}$ at the distance of M33). These data allow complete coverage of thegalaxy with high sensitivity to soft sources such as diffuse hot gas andsupernova remnants. Here we describe the methods we used to identify andcharacterize 1296 point sources in the 8 fields. We compare our resultingsource catalog to the literature, note variable sources, construct hardnessratios, classify soft sources, analyze the source density profile, and measurethe X-ray luminosity function. As a result of the large effective area ofXMM-Newton below 1 keV, the survey contains many new soft X-ray sources. Theradial source density profile and X-ray luminosity function for the sourcessuggests that only $\sim$15% of the 391 bright sources withL${>}$3.6$\times$10$^{35}$ erg s$^{-1}$ are likely to be associated with M33,and more than a third of these are known supernova remnants. The log(N)--log(S)distribution, when corrected for background contamination, is a relatively flatpower-law with a differential index of 1.5, which suggests many of the otherM33 sources may be high-mass X-ray binaries. Finally, we note the discovery ofan interesting new transient X-ray source, which we are unable to classify.

A Deep XMM-Newton Survey of M33: Point Source Catalog, Source Detection and Characterization of Overlapping Fields