Magellanic Cloud X-ray sources. III. Completion of a ROSAT survey

This paper concludes a series of three papers presenting ROSAT High Resolut ion Imager (HRI) observations of unidentified Einstein and serendipitous RO SAT X-ray sources in the direction of the Magellanic Clouds. Accurate posit ions and fluxes have been measured for these sources. Optical photometry an d spectroscopy were obtained to search for identifications in order to dete rmine the physical nature of these sources. The present paper includes new data for 24 objects; identifications are given or confirmed for 30 sources. For six sources, optical finding charts showing the X-ray positions are pr ovided. The results from this program are summarized, showing that the popu lations of luminous X-ray sources in the Magellanic Clouds are quite differ ent from those in the Galaxy.