093559

We propose to observe the Seyfert galaxy NGC4151 simultaneously with NuSTAR(for 100 ks) and XMM-Newton (for 50 ks) during a 750ks IXPE pointing.NGC4151 is the first radio-quiet Active Galactic Nucleus with an X-raypolarization measure for the corona and offers the unique opportunityto investigate possible changes in the polarization properties of thesystem due to its extreme variability and high luminosity. The synergybetween NuSTAR XMM-Newton and IXPE will allow us to measure the physicalproperties of the hot corona and assess the different spectral componentcontributions. NGC4151 is also a target for XRISM program offering thechance for contemporaneous observations. [truncated! Please see actual data for full text]