{"paper":{"title":"The X-ray polarisation of the Seyfert 1 galaxy IC 4329A","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Brez, A. De Rosa, A. Di Marco, A. F. Tennant, A. Ingram, A. L. Peirson, A. Manfreda, A. Marinucci, A. Papitto, A. P. Marscher, A. Possenti, A. Ratheesh, A. Trois, A. Veledina, B. D. Ramsey, C. Oppedisano, C. Sgro, C.-T. Chen, C.-Y. Ng, D. A. Swartz, D. E. Kim, D. J. Rosario, D. Tagliacozzo, E. Cavazzuti, E. Costa, E. Del Monte, F. Capitanio, F. Kislat, F. La Monaca, F. Marin, F. Massaro, F. Muleri, F. Tavecchio, F. Tombesi, F. Ursini, F. Xie, G. G. Pavlov, G. Madejski, G. Matt, G. Spandre, H. Krawczynski, H. L. Marshall, I. Agudo, I. Donnarumma, I. Liodakis, I. Mitsuishi, J. A. Garcia, J. Heyl, J. J. Kolodziejczak, J. Podgorny, J. Poutanen, J. Rankin, J. Vink, K. Wu, L. A. Antonelli, L. Baldini, L. Di Gesu, L. Latronico, M. Bachetti, M. C. Weisskopf, M. Dovvciak, M. Ewing, M. Negro, M. Perri, M. Pesce-Rollins, M. Pilia, N. Bucciantini, N. Di Lalla, N. E. Thomas, N. Omodei, O. J. Roberts, P. Kaaret, P-O. Petrucci, P. Slane, P. Soffitta, R. Bellazzini, R. Bonino, R. Ferrazzoli, R. Middei, R. Taverna, R. Turolla, R. W. Romani, S. Bianchi, S. Castellano, S. Ciprini, S. D. Bongiorno, S. Fabiani, S. G. Jorstad, S. Gunji, S. L. ODell, S. Maldera, S. Puccetti, S. R. Ehlert, S. S. Tsygankov, S. Zane, T. Barnouin, T. Enoto, T. Kitaguchi, T. Mizuno, T. Tamagawa, V. Doroshenko, V. E. Gianolli, V. Karas, V. Loktev, W. H. Baumgartner, W. Iwakiri, Y. Evangelista, Y. Tawara","submitted_at":"2023-05-22T13:31:55Z","abstract_excerpt":"We present an X-ray spectro-polarimetric analysis of the bright Seyfert galaxy IC 4329A. The Imaging X-ray Polarimetry Explorer (IXPE) observed the source for ~500 ks, supported by XMM-Newton (~60 ks) and NuSTAR (~80 ks) exposures. We detect polarisation in the 2-8 keV band with 2.97 sigma confidence. We report a polarisation degree of $3.3\\pm1.1$ per cent and a polarisation angle of $78\\pm10$ degrees (errors are 1 sigma confidence). The X-ray polarisation is consistent with being aligned with the radio jet, albeit partially due to large uncertainties on the radio position angle. We jointly fi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2305.13028","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2305.13028/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}