Polarization Properties of the Weakly Magnetized Neutron Star X-Ray Binary GS 1826–238 in the High Soft State
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Published:2023-02-01
Issue:2
Volume:943
Page:129
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ISSN:0004-637X
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Container-title:The Astrophysical Journal
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language:
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Short-container-title:ApJ
Author:
Capitanio FiammaORCID, Fabiani SergioORCID, Gnarini AndreaORCID, Ursini FrancescoORCID, Ferrigno CarloORCID, Matt GiorgioORCID, Poutanen JuriORCID, Cocchi MassimoORCID, Mikusincova RomanaORCID, Farinelli RubenORCID, Bianchi StefanoORCID, Kajava Jari J. E.ORCID, Muleri FabioORCID, Sanchez-Fernandez CeliaORCID, Soffitta PaoloORCID, Wu KinwahORCID, Agudo IvánORCID, Antonelli Lucio A.ORCID, Bachetti MatteoORCID, Baldini LucaORCID, Baumgartner Wayne H.ORCID, Bellazzini RonaldoORCID, Bongiorno Stephen D.ORCID, Bonino RaffaellaORCID, Brez AlessandroORCID, Bucciantini NiccolòORCID, Castellano SimoneORCID, Cavazzuti ElisabettaORCID, Ciprini StefanoORCID, Costa EnricoORCID, De Rosa AlessandraORCID, Del Monte EttoreORCID, Di Gesu LauraORCID, Di Lalla NiccolòORCID, Di Marco AlessandroORCID, Donnarumma ImmacolataORCID, Doroshenko VictorORCID, Dovčiak MichalORCID, Ehlert Steven R.ORCID, Enoto TeruakiORCID, Evangelista YuriORCID, Ferrazzoli RiccardoORCID, Garcia Javier A.ORCID, Gunji ShuichiORCID, Hayashida Kiyoshi, Heyl JeremyORCID, Iwakiri WataruORCID, Jorstad Svetlana G.ORCID, Karas VladimirORCID, Kitaguchi Takao, Kolodziejczak Jeffery J.ORCID, Krawczynski HenricORCID, La Monaca FabioORCID, Latronico LucaORCID, Liodakis IoannisORCID, Maldera SimoneORCID, Manfreda AlbertoORCID, Marin FrédéricORCID, Marinucci AndreaORCID, Marscher Alan P.ORCID, Marshall Herman L.ORCID, Mitsuishi Ikuyuki, Mizuno TsunefumiORCID, Ng C.-Y.ORCID, O’Dell Stephen L.ORCID, Omodei NicolaORCID, Oppedisano ChiaraORCID, Papitto AlessandroORCID, Pavlov George G.ORCID, Peirson Abel L.ORCID, Perri MatteoORCID, Pesce-Rollins MelissaORCID, Petrucci Pierre-OlivierORCID, Pilia MauraORCID, Possenti AndreaORCID, Puccetti SimonettaORCID, Ramsey Brian D.ORCID, Rankin JohnORCID, Ratheesh AjayORCID, Romani Roger W.ORCID, Sgrò CarmeloORCID, Slane PatrickORCID, Spandre GloriaORCID, Tamagawa ToruORCID, Tavecchio FabrizioORCID, Taverna RobertoORCID, Tawara Yuzuru, Tennant Allyn F.ORCID, Thomas Nicholas E.ORCID, Tombesi FrancescoORCID, Trois AlessioORCID, Tsygankov Sergey S.ORCID, Turolla RobertoORCID, Vink JaccoORCID, Weisskopf Martin C.ORCID, Xie FeiORCID, Zane SilviaORCID
Abstract
Abstract
The launch of the Imaging X-ray Polarimetry Explorer (IXPE) on 2021 December 9 has opened a new window in X-ray astronomy. We report here the results of the first IXPE observation of a weakly magnetized neutron star, GS 1826−238, performed on 2022 March 29–31 when the source was in a high soft state. An upper limit (99.73% confidence level) of 1.3% for the linear polarization degree is obtained over the IXPE 2–8 keV energy range. Coordinated INTEGRAL and NICER observations were carried out simultaneously with IXPE. The spectral parameters obtained from the fits to the broadband spectrum were used as inputs for Monte Carlo simulations considering different possible geometries of the X-ray emitting region. Comparing the IXPE upper limit with these simulations, we can put constraints on the geometry and inclination angle of GS 1826–238.
Funder
Istituto Nazionale di Astrofisica
Publisher
American Astronomical Society
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
17 articles.
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