Walton, D. J.D. J.WaltonNARDINI, EMANUELEEMANUELENARDINIGallo, L. C.L. C.GalloReynolds, M. T.M. T.ReynoldsRicci, C.C.RicciDauser, T.T.DauserFabian, A. C.A. C.FabianGarcia, J. A.J. A.GarciaHarrison, F. A.F. A.HarrisonRisaliti, G.G.RisalitiStern, D.D.Stern2022-06-202022-06-2020190035-8711http://hdl.handle.net/20.500.12386/32421We present results from a deep, coordinated $XMM$-$Newton$+$NuSTAR$ observation of the Seyfert 2 galaxy IRAS 00521-7054. The $NuSTAR$ data provide the first detection of this source in high-energy X-rays ($E > 10$ keV), and the broadband data show this to be a highly complex source which exhibits relativistic reflection from the inner accretion disc, further reprocessing by more distant material, neutral absorption, and evidence for ionised absorption in an extreme, ultrafast outflow ($v_{\rm{out}} \sim 0.4c$). Based on lamppost disc reflection models, we find evidence that the central supermassive black hole is rapidly rotating ($a > 0.77$), consistent with previous estimates from the profile of the relativistic iron line, and that the accretion disc is viewed at a fairly high inclination ($i \sim 59^{\circ}$). Based on extensive simulations, we find the ultrafast outflow is detected at $\sim$4$\sigma$ significance (or greater). We also estimate that the extreme outflow should be sufficient to power galaxy-scale feedback, and may even dominate the energetics of the total output from the system.STAMPAenArticle10.1093/mnras/stz1152-s2.0-85063397965WOS:000462302600078https://academic.oup.com/mnras/article/484/2/2544/5289901?http://arxiv.org/abs/1901.05016v12019MNRAS.484.2544WFIS/05 - ASTRONOMIA E ASTROFISICA