A MULTI WAVELENGTH VIEW OF THE ULTRA FAST OUTFLOW IN PDS 456

PDS456, the most luminous nearby quasar, is the prototype ultra fast outflow.With NuSTAR and XMM, we established the presence of a fast (0.3c), wide angleaccretion disk wind, with sufficient power to provide significant mechanicalfeedback into its host galaxy. In a subsequent analysis of archival HSTobservations, we have found evidence for a fast, 0.3c UV counterpart of thewind, which may make PDS456 the fastest BALQSO known to date. We have now beenapproved a further 2x3 orbit HST/COS observations for 2018, to confirm the fastnature of the UV wind and its variability. Here, we request simultaneous Xraycoverage to be coordinated with HST, via 2x80 ks NuSTAR + XMM observations,which will reveal the wind structure and variability from the UV to hard Xrays. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]