X-ray spectroscopy of the cluster of galaxies Abell 1795 with XMM-Newton

The initial results from XMM-Newton observations of the rich cluster of gal axies Abell 1795 are presented. The spatially-resolved X-ray spectra taken by the European Photon Imaging Cameras (EPIC) show a temperature drop at a radius of similar to 200 kpc from the cluster center, indicating that the I CM is cooling. Both the EPIC and the Reflection Grating Spectrometers (RGS) spectra extracted from the cluster center can be described by an isotherma l model with a temperature of similar to4 keV. The volume emission measure of any cool component (< 1 keV) is less than a few % of the hot component a t the cluster center. A strong O-VIII Lyman <alpha> line was detected with the RGS from the cluster core. The O abundance and its ratio to Fe at the c luster center is 0.2-0,5 and 0.5-1.5 times the solar value, respectively.