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The XMM-Newton/2dF survey-VIII: The extended X-ray sources

T. Gaga·M. Plionis·S. Basilakos·I. Georgantopoulos·A. Georgakakis
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Abstract

We present a sample of eight extended X-ray sources detected in the wide-field (~2.3 deg^2), bright (2-10 ksec) XMM-Newton/2dF survey, reaching a flux limit of ~2 X 10^{-14} erg/s/cm^2. Of these, seven are identified as secure X-ray clusters in the soft 0.3-2 keV band using a standard wavelet algorithm on either the PN or the MOS images. Spectroscopic or photometric redshifts are available for five clusters, spanning a range between 0.12 and 0.68. The X-ray spectral fittings show temperatures between 1 and 4.6 keV, characteristic of poor clusters and groups of galaxies. We derive for the first time the XMM-Newton cluster number count log N-log S distribution albeit with poor statistics. Both the log N-\log S and the Luminosity-Temperature relation are in good agreement with previous ROSAT results.

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T. Gaga, M. Plionis, S. Basilakos, I. Georgantopoulos, A. Georgakakis. 2005-09-14. The XMM-Newton/2dF survey-VIII: The extended X-ray sources. https://doi.org/10.1111/j.1365-2966.2005.09481.x

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