Polarization constraints on the X-ray corona in Seyfert Galaxies: MCG-05-23-16
- Marinucci, A.
- Muleri, F.
- Dovciak, M.
- Bianchi, S.
- Marin, F.
- Matt, G.
- Ursini, F.
- Middei, R.
- Marshall, H. L.
- Baldini, L.
- Barnouin, T.
- Rodriguez, N. Cavero
- De Rosa, A.
- Di Gesu, L.
- Harper, D.
- Ingram, A.
- Karas, V.
- Krawczynski, H.
- Madejski, G.
- Panagiotou, C.
- Petrucci, P. O.
- Podgorny, J.
- Puccetti, S.
- Tombesi, F.
- Veledina, A.
- Zhang, W.
- Agudo, I.
- Antonelli, L. A.
- Bachetti, M.
- Baumgartner, W. H.
- Bellazzini, R.
- Bongiorno, S. D.
- Bonino, R.
- Brez, A.
- Bucciantini, N.
- Capitanio, F.
- Castellano, S.
- Cavazzuti, E.
- Ciprini, S.
- Costa, E.
- del Monte, E.
- Di Lalla, N.
- Di Marco, A.
- Donnarumma, I.
- Doroshenko, V.
- Ehlert, S. R.
- Enoto, T.
- Evangelista, Y.
- Fabiani, S.
- Ferrazzoli, R.
- Garcia, J. A.
- Gunji, S.
- Hayashida, K.
- Heyl, J.
- Iwakiri, W.
- Jorstad, S. G.
- Kitaguchi, T.
- Kolodziejczak, J. J.
- La Monaca, F.
- Latronico, L.
- Liodakis, I.
- Maldera, S.
- Manfreda, A.
- Marscher, A. P.
- Mitsuishi, I.
- Mizuno, T.
- Ng, C. -Y.
- O'Dell, S. L.
- Omodei, N.
- Oppedisano, C.
- Papitto, A.
- Pavlov, G. G.
- Peirson, A. L.
- Perri, M.
- Pesce-Rollins, M.
- Pilia, M.
- Possenti, A.
- Poutanen, J.
- Ramsey, B. D.
- Rankin, J.
- Ratheesh, A.
- Romani, R. W.
- Sgrš, C.
- Slane, P.
- Soffitta, P.
- Spandre, G.
- Tamagawa, T.
- Tavecchio, F.
- Taverna, R.
- Tawara, Y.
- Tennant, A. F.
- Thomas, N. E.
- Trois, A.
- Tsygankov, S. S.
- Turolla, R.
- Vink, J.
- Weisskopf, M. C.
- Wu, K.
- Xie, F.
- Zane, S.
DOIAbstract
International audienceWe report on the first observation of a radio-quiet Active Galactic Nucleus (AGN) in polarized X-rays: the Seyfert 1.9 galaxy MCG-05-23-16. This source was pointed at with the Imaging X-ray Polarimetry Explorer (IXPE) starting on May 14, 2022 for a net observing time of 486 ks, simultaneously with XMM-Newton (58 ks) and NuSTAR (83 ks). A polarization degree Π smaller than 4.7 per cent (at the 99 per cent confidence level) is derived in the 2-8 keV energy range, where emission is dominated by the primary component ascribed to the hot corona. The broad-band spectrum, inferred from a simultaneous fit to the IXPE, NuSTAR, and XMM-Newton data, is well reproduced by a power law with photon index Γ = 1.85 ± 0.01 and a high-en...
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