Description
We test the prediction of Hamilton and Helfand (<A HREF="http://simbad.cds.unistra.fr/simbad/sim-ref?bibcode=1993ApJ...418...55H%201993ApJ...418...55H">1993ApJ...418...55H 1993ApJ...418...55H</A>) that faint radio selected galaxies are a new class contributing to the diffuse X-ray background (XRB) radiation. The test is based on the correlation of X-ray, optical and radio positions for sources detected in ROSAT (S<SUB>0.08–2.4keV</SUB>>6x10<SUP>–15</SUP>erg/s/cm<SUP>2</SUP>, 69 sources) and ATCA (S<SUB>1.42GHz</SUB>>250uJy, 93 sources) observations of the Einstein Pavo field. A total of six ATCA radio sources inside the inner ring of the ROSAT image are located within 10" of the ROSAT X-ray positions, with one associated by random chance.
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