DEEP VLA IMAGES OF GLOBULAR-CLUSTERS - NGC-6624

We present a sensitive radio image of the bright X-ray source 4U 1820-30 in the globular cluster NGC 6624. We confirm that the source is several arcseconds away from the cluster core. This implies that the observed negative orbital period derivative cannot be due to gravitational acceleration by the cluster. This work brings to three the number of cluster X-ray sources detected in the radio. Identification of cluster X-ray sources via their radio emission can be profitably used for precision optical identification and to elucidate the nature of the enigmatic low-luminosity cluster X-ray sources.