Beppo-Sax Observation of the Coma cluster
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We present first results of the BeppoSAX observation of the Coma Cluster. Thanks to the unprecedented sensitivity of the PDS instrument, the source has been detected up to ~80 keV. There is clear evidence for emission in excess to the thermal one above ~25 keV, very likely of non-thermal origin. We have therefore, for the first time, detected the long sought Inverse Compton emission on CMB photons predicted in clusters, like Coma, with radio halos. Combining X and radio observations, a value of 0.16 micro Gauss for the volume-averaged intracluster magnetic field is derived.
4 LaTex pages, 1 encapsulated Postscript figure, to appear in the Proceedings of "32nd COSPAR Scientific Assembly, Nagoya, Japan, 12-19 July 1998"; dario@saturn.ias.rm.cnr.it
4 LaTex pages, 1 encapsulated Postscript figure, to appear in the Proceedings of "32nd COSPAR Scientific Assembly, Nagoya, Japan, 12-19 July 1998"; dario@saturn.ias.rm.cnr.it