089060

PG1448+273 is a luminous Narrow Line Seyfert 1 galaxy thought to be accreting at the Eddington limit. An XMM-Newton observation in 2017 captured an ultra fast outflow in PG1448+273 via a deep Fe absorption trough between 7-8 keV with an outflow velocity of 0.1c. The AGN has never been observed at hard X-rays. We propose a simultaneous NuSTAR (120 ks) and XMM-Newton (75 ks) observation to quantify the physical properties of the fast wind. The observations will (i) provide a realistic estimate of the mass outflow rate and wind energetics (ii) probe variations in the wind in response to the continuum and (iii) measure the broadband SED and quantify the mass accretion rate and Eddington ratio. The observations will test the plausibility of radiation driven winds near the Eddington limit. [truncated! Please see actual data for full text]