Pith. sign in

REVIEW 3 cited by

The X-ray polarisation of the Seyfert 1 galaxy IC 4329A

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2305.13028 v2 pith:MON5YPWS submitted 2023-05-22 astro-ph.HE

The X-ray polarisation of the Seyfert 1 galaxy IC 4329A

A. Ingram , M. Ewing , A. Marinucci , D. Tagliacozzo , D. J. Rosario , A. Veledina , D. E. Kim , F. Marin
show 100 more authors
S. Bianchi J. Poutanen G. Matt H. L. Marshall F. Ursini A. De Rosa P-O. Petrucci G. Madejski T. Barnouin L. Di Gesu M. Dovvciak V. E. Gianolli H. Krawczynski V. Loktev R. Middei J. Podgorny S. Puccetti A. Ratheesh P. Soffitta F. Tombesi S. R. Ehlert F. Massaro I. Agudo L. A. Antonelli M. Bachetti L. Baldini W. H. Baumgartner R. Bellazzini S. D. Bongiorno R. Bonino A. Brez N. Bucciantini F. Capitanio S. Castellano E. Cavazzuti C.-T. Chen S. Ciprini E. Costa E. Del Monte N. Di Lalla A. Di Marco I. Donnarumma V. Doroshenko T. Enoto Y. Evangelista S. Fabiani R. Ferrazzoli J. A. Garcia S. Gunji J. Heyl W. Iwakiri S. G. Jorstad P. Kaaret V. Karas F. Kislat T. Kitaguchi J. J. Kolodziejczak F. La Monaca L. Latronico I. Liodakis S. Maldera A. Manfreda A. P. Marscher I. Mitsuishi T. Mizuno F. Muleri M. Negro C.-Y. Ng S. L. ODell N. Omodei C. Oppedisano A. Papitto G. G. Pavlov A. L. Peirson M. Perri M. Pesce-Rollins M. Pilia A. Possenti B. D. Ramsey J. Rankin O. J. Roberts R. W. Romani C. Sgro P. Slane G. Spandre D. A. Swartz T. Tamagawa F. Tavecchio R. Taverna Y. Tawara A. F. Tennant N. E. Thomas A. Trois S. S. Tsygankov R. Turolla J. Vink M. C. Weisskopf K. Wu F. Xie S. Zane
This is my paper
classification astro-ph.HE
keywords polarisationx-rayconfidenceanglecentsigmacomponentconsistent
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
0 comments
read the original abstract

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 fit the spectra from the three observatories to constrain the presence of a relativistic reflection component. From this, we obtain constraints on the inclination angle to the inner disc (< 39 degrees at 99 per cent confidence) and the disc inner radius (< 11 gravitational radii at 99 per cent confidence), although we note that modelling systematics in practice add to the quoted statistical error. Our spectro-polarimetric modelling indicates that the 2-8 keV polarisation is consistent with being dominated by emission directly observed from the X-ray corona, but the polarisation of the reflection component is completely unconstrained. Our constraints on viewer inclination and polarisation degree tentatively favour more asymmetric, possibly out-flowing, coronal geometries that produce more highly polarised emission, but the coronal geometry is unconstrained at the 3 sigma level.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Tracking down the broadband polarimetric properties of PG 1553+113

    astro-ph.HE 2026-05 unverdicted novelty 4.0

    New IXPE X-ray polarimetry and optical monitoring of PG 1553+113 reveal variable polarization and a large EVPA swing, supporting jet models with related but non-co-spatial X-ray and optical emission regions.

  2. TeV to PeV neutrinos from AGN coronae

    astro-ph.HE 2024-10 unverdicted novelty 3.0

    A Comptonization model of AGN coronae combined with Monte-Carlo photopion production and cosmological evolution can account for IceCube's ~100 TeV and sub-PeV neutrinos using only photohadronic processes.

  3. The hitchhiker's guide to the IXPE data analysis

    astro-ph.HE 2026-04 accept novelty 2.0

    A user-oriented guide that collects best practices, data formats, and analysis strategies for extracting polarimetric information from IXPE observations.