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We present the XMM-Newton observation of the merging system IRAS 19254-7245,also known as The Superantennae, whose southern nucleus is classified as aSeyfert 2 galaxy. The XMM-Newton data have allowed us to perform a detailedX-ray imaging and spectral analysis of this system. We clearly detect, for thefirst time in this system, a strong EW ~ 1.4 keV Fe emission line at 6.49+/-0.1keV (rest-frame). The X-ray spectrum requires a soft thermal component (kT~0.9keV; L(0.5-2) ~ 4E41 cgs), likely associated with the starburst, and a hardpower-law continuum above 2 keV (observed L(2-10) ~ 4E42 cgs). We confirm theflatness of this latter component, already noted in previous ASCA data. Thisflatness, together with the detection of the strong Fe-Kalpha line and otherbroad band indicators, suggest the presence of a Compton-thick AGN withintrinsic luminosity > 1E44 cgs. We show that a Compton-thick model canperfectly reproduce the X-ray spectral properties of this object.Comment: 6 pages, 4 figures, Latex manuscript, Accepted for publication in  Astronomy and Astrophysic

XMM-Newtonobservations of ULIRGs: A Compton-thick AGN in IRAS 19254–7245