Identification of Optical Counterparts of ULX sources

Bibcode
2006IAUS..230..310G
DOI
10.1017/S1743921306008556
Gutiérrez, Carlos M.; López-Corredoira, Martín
Bibliographical reference

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
Number of authors
2
IAC number of authors
0
Citations
4
Refereed citations
3
Description
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.
Type
Non-refereed

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