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We use a very deep 900 ks Chandra X-ray observation of the core of thePerseus cluster to measure and confirm the hard X-ray emission detected from aprevious analysis. By fitting a model made up of multiple temperaturecomponents plus a powerlaw or hot thermal component, we map the spatialdistribution of the hard flux. We confirm there is a strong hard excess withinthe central regions. The total luminosity in the 2-10 keV band inside 3 arcminradius is ~5x10^43 erg s^-1. As a second project we place limits on the thermalgas content of the X-ray cavities in the cluster core. This is done by fittinga model made up of multiple components to spectra from inside and outside ofthe bubbles, and looking at the the difference in strength of a component at aparticular temperature. This approach avoids assumptions about the geometry ofthe core of the cluster. Only up to 50 per cent of the volume of the cavitiescan be filled with thermal gas with a temperature of 50 keV.Comment: submitted for proceedings of "Heating vs Cooling in Galaxies and  Clusters of Galaxies", August 2006, Garchin

Hard X-ray emission from the core of the Perseus cluster and the thermal content of the radio bubbles