Hard X-ray observations of a sample of clusters of Galaxies

Computer Science

Scientific paper

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Galaxy Clusters, X-Ray

Scientific paper

The BeppoSAX public archive has been searched for hard X-ray data obtained with the PDS instruments on observations of clusters of Galaxies. Of the fourteen objects analyzed with the standard procedure, eight are detected with a significance >5σ in the 13-100 keV range, while for the remaining objects a marginal detection (3<σ<5) can be claimed. A preliminary spectral analysis of source data having more than 10σ detection indicates that at least in some cases a second component is present besides the thermal bremsstrahlung emission that dominates at low energy. However, the lack of imaging capability in the PDS prevents discrimination between an origin of this radiation in terms of an AGN or diffuse cluster emission. The potential of the INTEGRAL instruments to detect this high energy emission in Clusters of Galaxies is briefly discussed. .

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