The first soft X-ray survey of the LMC with imaging instruments was performed with the Einstein satellite (Long et al. 1981, hereafter LHG81; Wang et al. 1991, hereafter WHHW91). More than 100 discrete X-ray sources were detected and in addition large-scale diffuse emission originating from hot gas with temperatures of several 106 K was revealed. About 50% of the point-like sources were identified with objects in the LMC, while the remainder was assigned to galactic foreground stars and background AGN. Due to the vicinity to the south ecliptic pole the LMC was observed with high sensitivity by the Position Sensitive Proportional Counter (PSPC) during the ROSAT all-sky survey (RASS). For a description of the ROSAT mission and PSPC detector see Trümper (1983) and Pfeffermann et al. (1986). Pietsch & Kahabka (1993) analyzed a area centered on the LMC and found more than 500 X-ray sources.
Large-scale radio surveys of the LMC were performed using the Parkes 64 m radio telescope at different frequencies (Filipovic et al. 1995). A comparison of the radio source catalogue with the ROSAT survey catalogue of Pietsch & Kahabka (1993) yielded 71 sources within a correlation radius of 2.5 (Filipovic et al. 1996). These are mainly SNRs and extragalactic objects.
Pointed ROSAT PSPC observations from independent scientific programs covered large parts of the LMC and first mosaic images have been published by Snowden & Petre (1994). Here we present the first results of a systematic study of the PSPC observations to derive a catalogue of point(-like) sources in the LMC. Cross-correlations with catalogues from other wavelength bands yield first identifications and allow to derive classification schemes for the new, unidentified sources. Based on this one can pre-select candidate samples for various source classes like SNRs, X-ray binaries and SSSs in the LMC and to distinguish them from foreground stars and background AGN.
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