2008ApJ...673..176G

We report the details of an XMM-Newton observation of the cluster of galaxies Zw 1305.4+2941 at the intermediate redshift z=0.241, increasing the small number of interesting X-ray constraints on properties of ∼3 keV systems above z=0.1. Based on the ∼45 ks XMM-Newton observation, we find that within a radius of 228 kpc the cluster has an unabsorbed X-ray flux of f_X=(2.07±0.06)x10^–13 ergs/cm2/s, a temperature of kT=3.17±0.19 keV, in good agreement with the previous ROSAT determination, and an abundance of 0.93^+0.24_–0.29Z_☉. Within r₅₀₀=723±16 kpc the rest-frame bolometric X-ray luminosity is L_X(r₅₀₀)=(1.25±0.16)x10⁴⁴ h^–2₇₀ ergs/s. The cluster obeys the scaling relations for L_X, T, and the velocity dispersion σ_v derived at intermediate redshift for kT≲4 keV, for which we provide new fits for all objects in the literature. The mass derived from an isothermal NFW model fit is M_vir=(2.77±0.21)x10¹⁴ M_☉, with the concentration parameter c=7.9±0.5.