Toward an unbiased sample of X-ray selected normal galaxies outside the local Universe

Details Toward an unbiased sample of X-ray selected normal galaxies outside the local Universe Toward an unbiased sample of X-ray selected normal galaxies outside the local Universe

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008an....329..174g&link_type=abstract

Astronomische Nachrichten, Vol.329, Issue 2, p.174

Statistics

1

Surveys, X-Rays: Galaxies

Scientific paper

This paper shows that our understanding of the statistical properties of X-ray selected normal galaxies (e.g. X-ray luminosity function) can be significantly improved by combining a wide-area XMM-Newton survey with the moderare resolution and high S/N optical spectroscopy of the SDSS. Such a combined dataset has the potential to minimise uncertainties that affect existing normal galaxy samples at X-rays, such as small number statistics, cosmic variance, AGN contamination and incompleteness at bright X-ray luminosities. It is demonstrated that a 100 deg2 XMM-Newton survey in the SDSS area to the limit f_X ( 0.5-2 keV) ≈ 5 × 10-15 erg cm-2 s-1 will detect over 400 X-ray selected normal galaxies with excellent control over systematic biases, thereby providing tight contraints on the X-ray luminosity function at z ≈ 0.1.

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