High Energy Results from BeppoSAX

Details High Energy Results from BeppoSAX High Energy Results from BeppoSAX

2002-07-11

arxiv.org/abs/astro-ph/0207241v1

Astronomy and Astrophysics

Astrophysics

15 pages, 9 figures, Invited Review : "Matter and Energy in Clusters of Galaxies", 23-27 April 2002, Taiwan, ASP, Conf. Ser.,

Scientific paper

We review all the BeppoSAX results relative to the search for additional nonthermal components in the spectra of clusters of galaxies. In particular, our MECS data analysis of A2199 does not confirm the presence of the nonthermal excess reported by Kaastra et al. (1999). A new observation of A2256 seems to indicate quite definitely that the nonthermal fluxes detected in Coma and A2256 are due to a diffuse nonthermal mechanism involving the intracluster medium. We report marginal evidence (~3\sigma) for a nonthermal excess in A754 and A119, but the presence of point sources in the field of view of the PDS makes unlikely a diffuse interpretation.

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