UV to hard X-ray spectroscopy of the prototype disk wind quasar comma PDS 456

PDS 456, the most luminous nearby AGN, is now recognised as the prototype ultrafast outflow. Our recent XMMNewton and NuSTAR campaign on PDS 456 establishedthe presence of a fast (0.3c), wide angle disk wind, sufficient to providesignificant mechanical feedback into its host galaxy. The new RGS data haverevealed the presence of variable, broad soft Xray absorption lines from thedisk wind, which may be associated to the partial covering absorber. Here wepropose for 2x80 ks XMMNewton observations of PDS 456 and a two orbit HST/COSsnapshot which will simultaneously measure the wind in the UV and Xrays. Therequested observations will be concurrent with a likely AstroH observationduring 2016. For the first time we will obtain high resolution coverage of the wind from the UV to hard Xrays. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]