XMM-Newton study of the lensing cluster of galaxies CL 0024+17

We present a detailed gravitational mass measurement based on the XMM-Newton imaging spectroscopy analysis of the lensing cluster of galaxies CL 0024+ 17 at z = 0.395. The emission appears approximately symmetric. However, on the scale of r similar to 3.3' some indication of elongation is visible in the northwest-southeast (NW-SE) direction from the hardness ratio map (HRM). Within 3', we measure a global gas temperature of 3.52 +/- 0.17 keV, metallicity of 0.22 +/- 0.07, and bolometric luminosity of 2.9 +/- 0.1 x 10(44) h(70)(-2) erg s(-1). We derive a temperature distribution with an isothermal temperature of 3.9 keV to a radius of 1.5' and a temperature gradient in the outskirts (1.3' < r < 3'). Under the assumption of hydrostatic equilibrium, we measure gravitational mass and gas mass fraction to be M-200 = 2.0 +/- 0.3 x 10(14) h(70)(- 1) M-. and f(gas) = 0.20 +/- 0.03 h(70)(-3/2) at r(200) = 1.05 h(70)(-1) Mpc using the observed temperature profile. The complex structure in the core region is the key to explaining the discrepancy in gravitational mass determined from XMM-Newton X-ray observations and HST optical lensing measurements.