A RADIO SURVEY OF SUPERSOFT, PERSISTENT AND TRANSIENT-X-RAY SOURCES IN THE MAGELLANIC CLOUDS

We present a radio survey of X-ray sources in the Large and Small Mage llanic Clouds with the Australia Telescope Compact Array at 6.3 and 3. 5 cm. Specifically, we have observed the fields of five LMC and two SM C supersoft X-ray sources, the X-ray binaries LMC X-l, X-2, X-3 and X- 4, the X-ray transient Nova SMC 1992, and the soft gamma-ray repealer SGR 0525-66. None of the targets are detected as point sources at thei r catalogued positions. In particular, the proposed supersoft jet sour ce RXT 0513-69 is not detected, placing constraints on its radio lumin osity compared to Galactic jet sources. Limits on emission from the bl ack hole candidate systems LMC X-l and X-3 are consistent with the rad io behaviour of persistent Galactic black hole X-ray binaries, and a p revious possible radio detection of LMC X-l is found to be almost cert ainly a result of nearby field sources. The SNR N49 in the field of SG R 0525-66 is mapped at higher resolution than it has been previously, but there is still no evidence for any enhanced emission or disruption of the SNR at the location of the X-ray source.