Abstract
ABSTRACT The globular cluster NCC 5824 lies within the error box of the transient X-ray source Cen XR-4. The characteristics of the cluster make it a likely a candidate for a globular cluster X-ray source. Observations of the transient X-ray source and the characteristics of the globular cluster are briefly reviewed. If the source originated in the globular cluster, the maximum X-ray luminosity was 3 X 1040 erg , two orders of magnitude more luminous than any other observed galactic or globular cluster X-ray source. The implication of this result is that a massive black hole might exist within the cluster. Key words: X-ray sources-globular clusters
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