A catalogue of ultraluminous X-ray sources in external galaxies *
Service d'Astrophysique – CEA-Saclay, 91191 Gif-sur-Yvette, France
2 Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, PR China e-mail: email@example.com
3 Instituto de Astronomía y Física del Espacio/Conicet. Bs As, Argentina
Accepted: 7 September 2004
We present a catalogue of ultraluminous X-ray sources (ULXs) in external galaxies. The aim of this catalogue is to provide easy access to the properties of ULXs, their possible counterparts at other wavelengths (optical, IR, and radio), and their host galaxies. The catalogue contains 229 ULXs reported in the literature until April 2004. Most ULXs are stellar-mass-black hole X-ray binaries, but it is not excluded that some ULXs could be intermediate-mass black holes. A small fraction of the candidate ULXs may be background Active Galactic Nuclei (AGN) and Supernova Remnants (SNRs). ULXs with luminosity above 1040 are found in both starburst galaxies and in the halos of early-type galaxies.
Key words: X-rays: galaxies / X-rays: binaries / galaxies: general / catalogs
© ESO, 2005