Mapping the Inner Accretion Disk Wind in the Quasar PDS 456

PDS 456 is the most luminous nearby AGN, more typical of quasars at highredshift. A previous 40ks XMMNewton (2001) observation revealed deep, highlyionised absorption at iron K and at 1 keV in the RGS spectrum. Subsequent Suzakuobservations resolved the powerful ionised outflow, moving at 0.25c and revealeda direct response of the iron K absorption to a decrease in the ionising flux.We propose to monitor the remarkable spectral variability and outflow from PDS456, through a series of 5x100ks XMMNewton observations. From the timescale ofthe absorber variability we will probe the inner structure of the quasar wind,on scales of 10s100s of Rg from the black hole and determine the intrinsicmechanism for the rapid variability in PDS 456. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]