***********************************************************
OATS-DAUT SEMINAR
***********************************************************
Speaker: Alexis Finoguenov (Max-Planck-Institut für extraterrestrische Physik & University of Maryland - Baltimore County)

Title: Groups and clusters of galaxies in deep XMM-Newton surveys

Date: Wednesday, June 14th, 2006
Time: 12:00 noon
Venue: Villa Bazzoni

***********************************************************
Abstract:
I my talk I will review the recent progress on cluster search in several projects that made use of XMM-Newton data: COSMOS, SXDS-UDS, CDFS, Lockman Hole and present the results on cluster identification using the photometric redshift estimates. A statistical description of surveys in terms of the cumulative log(N>S)-log(S) distribution compares well with the previous results, although yielding a somewhat higher number of clusters at similar fluxes. The luminosity function of clusters in deep surveys matches well the results of nearby surveys, providing a comparably tight constraint on the faint end slope of alpha=1.93+/-0.04. For the probed luminosity range of 8x10^42-2x10^44 ergs/s, the surveys are in agreement with and add significantly to the existing data on the cluster luminosity function at high redshifts and imply no substantial evolution at these luminosities to z=1.3.
***********************************************************