RGS spectra from clusters of galaxies

Spectra extracted from the central regions of the rich galaxy
clusters Abell S 1101(=Sérsic 159-03), Abell 1795 and Abell 1835 obtained with XMM-Newton's Reflection Grating Spectrometers (RGS).
Courtesy T. Tamura, SRON, Utrecht, NL – J. Peterson, Columbia
Univ., NY, USA