The XXL Survey XXV. Cosmological analysis of the C1 cluster number counts

Understand

Context.

• We present an estimation of cosmological parameters with clusters of galaxies.
• Aims.
• We constrain the $\Omega_m$, $\sigma_8$, and $w$ parameters from a stand-alone sample of X-ray clusters detected in the 50 deg$^2$ XMM-XXL survey with a well-defined selection function.