Title: Buried Quasars in Ultraluminous Infrared Galaxies

Title: Buried Quasars in Ultraluminous Infrared Galaxies

Proposal ID: 0120024
Subject category: Extragalactic Object
Principal investigator: Mirabel
Institute: CEA/Saclay

Abstract

We propose to probe with INTEGRAL dust enshrouded AGN in two Ultraluminous Infrared Galaxies (ULIGs): 1) Mrk 231 which is the most luminous object of this class in the Local Universe, and 2) IRAS 0518-25 which is an extremely "warm" infrared object. The purpose of this proposal is to measure the integrated flux in the 20-1000 keV energy band, before detailed spectroscopy with high energy resolution. These two galaxies are being observed under related proposals with XMM. The energy output in the XMM and INTEGRAL energy bands will allow to assess which is the relative contribution of the AGN to the overall radiative power in the most luminous galaxies of the Local Univers.