A preliminary version of a catalog of high-low-mass X-ray binaries

We introduce a catalogue of X-ray binaries. The full catalogue is available at http://astroa.physics.metu.edu.tr/XRBC/. The aim of this catalogue is t o provide basic information about X-ray sources and their counterparts. The catalog contains positions, information about distances and counterparts, spectral, photometric and timing properties of the X-ray sources in the X-r ay and optical bands, as well as references. The list of references, commen ts and the catalog as a whole will be periodically updated to include the m ost up-to-date information about all X-ray binaries and guide users to the recent literature on individual sources. In some cases, there is some doubt about the nature of an X-ray source, which has been noted. The sources are ordered according to right ascension. Here, we present a guide to the orga nization of the full catalogue. The full catalogue is represented here with an excerpt containing two HMXBs and two LMXBs as examples. (C) 2000 MAIK " Nauka/Interperiodica ".