Open AccessThe XMM–Newton /2dF survey – VIII. The extended X‐ray sources
Author(s) -
Gaga T.,
Plionis M.,
Basilakos S.,
Georgantopoulos I.,
Georgakakis A.
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.09481.x
Subject(s) - physics , rosat , astrophysics , redshift , luminosity , cluster (spacecraft) , flux (metallurgy) , galaxy cluster , galaxy , materials science , computer science , metallurgy , programming language
We present a sample of eight extended X‐ray sources detected in the wide‐field (∼2.3 deg 2 ), bright (2–10 ks) XMM–Newton /2dF survey, reaching a flux limit of ∼2 × 10 −14 erg s −1 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.