78 citations · 113 across the 4 of their papers we have counts for
4 papers
The XMM-Newton/2dF survey - II. The nature of X-ray faint optically bright X-ray sources
A. Georgakakis, I. Georgantopoulos, M. Vallbe +8
In this paper we investigate the properties of low X-ray-to-optical flux ratio sources detected in a wide area (2.5deg^2) shallow (f(0.5-8keV)~10e-14cgs) XMM-Newton survey. We find…
Comparison between optical and X-ray cluster detection methods
S. Basilakos, M. Plionis, S. Georgakakis +4
In this work we present combined optical and X-ray cluster detection methods in an area near the North Galactic Pole area, previously covered by the SDSS and 2dF optical surveys. T…
Using supercluster geometry as a cosmological probe
S. Basilakos, V. Kolokotronis, M. Plionis
We study the properties of superclusters detected in the Abell/ACO cluster catalogue. We identify the superclusters utilizing the `friend-of-friend' procedure, and then determine s…
Searching for cluster substructure using APM and ROSAT data
Vaggelis Kolokotronis, Spyros Basilakos, Manolis Plionis +1
We present a detailed study of the morphological features of 22 rich galaxy clusters. Our sample is constructed from a cross-correlation of optical (Abell+APM) data with X-ray (0.1…