Bibcode
Gutiérrez, Carlos M.; López-Corredoira, Martín
Referencia bibliográfica
Populations of High Energy Sources in Galaxies Proceedings of the 230th Symposium of the International Astronomical Union, Held in Dublin, Ireland 15-19 August 2005, Edited by E. J. A. Meurs; G. Fabbiano. Cambridge: Cambridge University Press, 2006., pp.310-311
Advertised on:
0
2006
Número de citas
4
Número de citas referidas
3
Descripción
We present the results of an on-going program for the identification and
characterization of optical counterparts of Ultra-Luminous X-ray (ULX)
sources. The targets have been selected from the catalogues by Colbert
& Ptak (2002) and Swartz et al. (2004). A clear identification based
on unambiguous optical spectral features was possible for 26 objects. A
large number of objects result to be QSOs at higher redshift than the
putative parent galaxy, and other ULXs seem to be associated to HII
regions. In a few cases the optical counterpart results a foreground
star in our galaxy. The observational program will continue to obtain a
representative sample for statistical studies.