Ariel V sky survey: observations of X-rays from galaxies in the region of 3U 0328-52.

Observations by the Ariel V sky-survey instrument in the galaxy-rich region around the X-ray source 3U 0328-52 show that the rich cluster of galaxies CA 0340-538 is probably responsible for most of the X-ray emission. For an assumed distance of 284 Mpc, this leads to an X-ray luminosity of 6.3 (+ or - 0.9) by 10 to the 44th power erg/s (2-10 keV). This result strengthens the association of X-ray emission with clusters which are rich, contain radio sources, and have dominant central galaxies.