Abstract

We detect four isolated, X-ray overluminous [Lx > 2 × 1043 -2 ergs s-1] elliptical galaxies (OLEGs) in our 160 deg2 ROSAT PSPC survey. The extent of their X-ray emission, total X-ray luminosity, total mass, and mass of the hot gas in these systems corresponds to poor clusters, and the optical luminosity of the central galaxies (MR 7 keV clusters.

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