0320015

X-ray emission provides the best tracer of conditions close to the central engines of AGNs. At low energies AGNs have a power law spectrum modified by the effects of absorption and reflection. At higher energies in the hard X-ray domain we have access to the intrinsic emission of these sources. We can measure the primary power law the reflection hump and the high energy cutoff. AGNs exhibit also rapid aperiodic variability for which no fully satisfying explanation has been advanced. INTEGRAL offers a unique opportunity for a wide variety of sensitive X-ray observations to investigate the physical processes at the origin of the complex emission of two Seyfert galaxies NGC 2110 and NGC 2992 which display many enigmatic properties. Indeed their Seyfert classification changed from 2 to 1 type without clear explanation and in the case of NGC 2992 a rebuilding of the AGN activity has been observed in 1998 reaching its flux level of 1978. We ask for one INTEGRAL observation of 400 ks for each object to obtain significant informations on their high energy emission in particular on the continuum and on the cutoff allowing us to study the nature of their central engine. [truncated! Please see actual data for full text]