The Most Luminous Object in the Local Universe comma the Quasar PDS456

We propose to utilise the unique power of the entire XMM instrument suite tostudy the most luminous object in the local Universe, the Quasar PDS456.PDS456 has a remarkable Xray spectrum, showing a steep hard Xray continuum,a deep ionised iron K edge, a soft excess, a low ionisation warm absorber andfast broadband Xray variability. PDS456 may be a quasar powered by asupermassive black hole accreting close to the Eddington limit. We will useXMM data to: (a) determine the origin of the Xray continuum emission mechanism; (b) differentiate between an ionised accretiondisk reflector ora highly ionised warm absorber for the origin of the iron K edge and weak line; truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]