Marinucci, A. and Muleri, F. and Dovciak, M. and Bianchi, S. and Marin, F. and Matt, G. and Ursini, F. and Middei, R. and Marshall, H. L. and Baldini, L. and Barnouin, T. and Cavero Rodriguez, N. and De Rosa, A. and Di Gesu, L. and Harper, D. and Ingram, A. and Karas, V. and Krawczynski, H. and Madejski, G. and Panagiotou, C. and Petrucci, P. O. and Podgorny, J. and Puccetti, S. and Tombesi, F. and Veledina, A. and Zhang, W. and Agudo, I. and Antonelli, L. A. and Bachetti, M. and Baumgartner, W. H. and Bellazzini, R. and Bongiorno, S. D. and Bonino, R. and Brez, A. and Bucciantini, N. and Capitanio, F. and Castellano, S. and Cavazzuti, E. and Ciprini, S. and Costa, E. and Del Monte, E. and Di Lalla, N. and Di Marco, A. and Donnarumma, I. and Doroshenko, V. and Ehlert, S. R. and Enoto, T. and Evangelista, Y. and Fabiani, S. and Ferrazzoli, R. and García, J. A. and Gunji, S. and Hayashida, K. and Heyl, J. and Iwakiri, W. and Jorstad, S. G. and Kitaguchi, T. and Kolodziejczak, J. J. and La Monaca, F. and Latronico, L. and Liodakis, I. and Maldera, S. and Manfreda, A. and Marscher, A. P. and Mitsuishi, I. and Mizuno, T. and Ng, C.-Y. and O’Dell, S. L. and Omodei, N. and Oppedisano, C. and Papitto, A. and Pavlov, G. G. and Peirson, A. L. and Perri, M. and Pesce-Rollins, M. and Pilia, M. and Possenti, A. and Poutanen, J. and Ramsey, B. D. and Rankin, J. S. and Ratheesh, A. and Romani, R. W. and Sgrš, C. and Slane, P. O. and Soffitta, P. and Spandre, G. and Tamagawa, T. and Tavecchio, F. and Taverna, R. and Tawara, Y. and Tennant, A. F. and Thomas, N. E. and Trois, A. and Tsygankov, S. S. and Turolla, R. and Vink, J. and Weisskopf, M. C. and Wu, K. and Xie, F. and Zane, S. (2022) Polarization constraints on the X-ray corona in Seyfert Galaxies: MCG-05-23-16. Monthly Notices of the Royal Astronomical Society, 516 (4). pp. 5907-5913. ISSN 0035-8711. doi:10.1093/mnras/stac2634. https://resolver.caltech.edu/CaltechAUTHORS:20221101-827781300.7
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Abstract
We 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 2022 May 14 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-energy cutoff E_C = 120 ± 15 keV. A comparison with Monte Carlo simulations shows that a lamp-post and a conical geometry of the corona are consistent with the observed upper limit, a slab geometry is allowed only if the inclination angle of the system is less than 50°.
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| Additional Information: | We thank the anonymous referee for her/his comments and suggestions, which greatly improved the clarity of the paper. The IXPE is a joint US and Italian mission. The US contribution is supported by the National Aeronautics and Space Administration (NASA) and led and managed by its Marshall Space Flight Center (MSFC), with industry partner Ball Aerospace (contract NNM15AA18C). The Italian contribution is supported by the Italian Space Agency (ASI) through contract ASI-OHBI-2017-12-I.0, agreements ASI-INAF-2017-12-H0 and ASI-INFN-2017.13-H0, and its Space Science Data Center (SSDC), and by the Istituto Nazionale di Astrofisica (INAF) and the Istituto Nazionale di Fisica Nucleare (INFN) in Italy. This research used data products provided by the IXPE Team (MSFC, SSDC, INAF, and INFN) and distributed with additional software tools by the High-Energy Astrophysics Science Archive Research Center (HEASARC), at NASA Goddard Space Flight Center (GSFC). Part of the French contribution is supported by the Scientific Research National Center (CNRS) and the French spatial agency (CNES). MD, VK, and JP thank for the support from the GACR project 21-06825X and the institutional support from RVO:67985815. IA acknowledges financial support from the Spanish ‘Ministerio de Ciencia e Innovación’ (MCINN) through the ‘Center of Excellence Severo Ochoa’ award for the Instituto de Astrofísica de Andalucía-CSIC (SEV-2017-0709) and through grants AYA2016-80889-P and PID2019-107847RB-C44. | ||||||||||||||||||||||||||||||
| Group: | Space Radiation Laboratory | ||||||||||||||||||||||||||||||
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| Issue or Number: | 4 | ||||||||||||||||||||||||||||||
| DOI: | 10.1093/mnras/stac2634 | ||||||||||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20221101-827781300.7 | ||||||||||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20221101-827781300.7 | ||||||||||||||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||||||||
| ID Code: | 117685 | ||||||||||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||||||||||
| Deposited By: | Research Services Depository | ||||||||||||||||||||||||||||||
| Deposited On: | 11 Nov 2022 17:06 | ||||||||||||||||||||||||||||||
| Last Modified: | 14 Nov 2022 19:23 |
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