Eight more ultra luminous X-ray candidates unmasked

Bibcode
2007A&A...472...87G
DOI
10.1051/0004-6361:20077513
Gutiérrez, C. M.; López-Corredoira, M.
Bibliographical reference

Astronomy and Astrophysics, Volume 472, Issue 1, September II 2007, pp.87-92

Advertised on:
9
2007
Journal
Astronomy and Astrophysics
Number of authors
2
IAC number of authors
2
Citations
6
Refereed citations
6
Description
Aims:We aim to identify the nature of several objects previously catalogued as ultra-luminous X-ray (ULX) source candidates. Methods: Long-slit spectroscopy of the optical counterparts has been carried out. Results: The eight objects are at higher redshift than their putative parent galaxies. Conclusions: It is found that these eight previously catalogued ULX candidates, most of them projected in galactic halos are actually background unrelated objects. This result confirms the high degree of contamination present in current catalogues of ULXs.
Type
Refereed
Galaxies
Quasars

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