884 citations · 4.5k across the 91 of their papers we have counts for
8 papers · 1 filter
The XXL Survey XX: The 365 cluster catalogue
C. Adami, P. Giles, E. Koulouridis +54
In the currently debated context of using clusters of galaxies as cosmological probes, the need for well-defined cluster samples is critical. The XXL Survey has been specifically d…
A New X-ray Selected Sample of Very Extended Galaxy Groups from the ROSAT All-Sky Survey
Weiwei Xu, Miriam E. Ramos-Ceja, Florian Pacaud +2
Some indications for tension have long been identified between cosmological constraints obtained from galaxy clusters and primary CMB measurements. Typically, assuming the matter d…
The XXL survey XXXV. The role of cluster mass in AGN activity
E. Koulouridis, M. Ricci, P. Giles +15
We present the results of a study of the AGN density in a homogeneous and well-studied sample of 167 bona fide X-ray galaxy clusters () from the XXL Survey. The results…
Introducing constrained matched filters for improved separation of point sources from galaxy clusters
Jens Erler, Miriam E. Ramos-Ceja, Kaustuv Basu +1
Matched filters (MFs) are elegant and widely used tools to detect and measure signals that resemble a known template in noisy data. However, they can perform poorly in the presence…
The XXL Survey: XXXIII. Chandra Constraints on the AGN Contamination of z > 1 XXL Galaxy Clusters
C. H. A. Logan, B. J. Maughan, M. N. Bremer +11
Context. The XMM-XXL survey uses observations from XMM-Newton to detect clusters of galaxies over a wide range in mass and redshift. The moderate PSF of XMM-Newton means that point…
The XXL Survey: XXXIV. Double irony in XXL-North. A tale of two radio galaxies in a supercluster at z = 0.14
C. Horellou, H. T. Intema, V. Smolčić +21
We show how the XXL multiwavelength survey can be used to shed light on radio galaxies and their environment. Two prominent radio galaxies were identified in a visual examination o…
Synthetic simulations of the extragalactic sky seen by eROSITA. I. Pre-launch selection functions from Monte-Carlo simulations
N. Clerc, M. E. Ramos-Ceja, J. Ridl +15
Studies of galaxy clusters provide stringent constraints on models of structure formation. Provided that selection effects are under control, large X-ray surveys are well suited to…
X-ray versus infrared selection of distant galaxy clusters: A case study using the XMM-LSS and SpARCS cluster samples
J. P. Willis, M. E. Ramos-Ceja, A. Muzzin +3
We present a comparison of two samples of z>0.8 galaxy clusters selected using different wavelength-dependent techniques and examine the physical differences between them. We consi…