This image shows a 500 ks IBIS observation of the
Coma Cluster region in the 20 to 50 keV range. In
addition to the Coma Cluster itself the image shows
12 serendipitous sources with more than 4 sigma
significance. The faintest sources in this image
are about 1 mCrab.
A large fraction of the identified sources are
low redshift (z < 0.02) AGN's, mostly of Seyfert I
type. The source in the image directly account for
about 3% of the cosmic X-ray background in the
20-50 keV band.