Fruits of the Universe series: CODEX weak lensing sample: the mass density profile of galaxy clusters at z~0.5

by Nathalia Cibirka (U Sao Paulo)

Thursday 28 Jul 2016, 12:30 → 13:00 Europe/Berlin

Lounge area, 1st floor (Excellence Cluster Universe)

Weak gravitational lensing analysis is a powerful tool to explore the properties of galaxy clusters. However different sources of systematic uncertainties can affect the final result. In this talk Nathalia will briefly introduce the CODEX (COnstrain Dark Energy with X-ray clusters) survey and discuss the stacked weak lensing analysis performed for a subsample of the CODEX galaxy clusters at z~0.5. We paid particular attention to two different sources of systematics: the contamination of the background sample by cluster members and the off-centring effect. She will explore the effects of these uncertainties over the constraints on mass and concentration and the adopted approach to circumvent these. The audience is cordially invited to discuss and comment. During this 30-minutes lunch event, we will serve drinks and fingerfood.