Title: | Polarization Properties of the Weakly Magnetized Neutron Star X-Ray Binary GS 1826–238 in the High Soft State |
Authors: | CAPITANIO, FIAMMA FABIANI, Sergio Gnarini, Andrea Ursini, Francesco Ferrigno, Carlo Matt, Giorgio Poutanen, Juri COCCHI, Massimo MIKUSINCOVA, Romana FARINELLI, Ruben Bianchi, Stefano Kajava, Jari J. E. MULERI, FABIO Sanchez-Fernandez, Celia SOFFITTA, PAOLO Wu, Kinwah Agudo, Iván ANTONELLI, Lucio Angelo BACHETTI, Matteo Baldini, Luca Baumgartner, Wayne H. Bellazzini, Ronaldo Bongiorno, Stephen D. Bonino, Raffaella Brez, Alessandro BUCCIANTINI, Niccolo' Castellano, Simone Cavazzuti, Elisabetta Ciprini, Stefano COSTA, ENRICO DE ROSA, Alessandra DEL MONTE, Ettore Di Gesu, Laura Di Lalla, Niccolò DI MARCO, Alessandro Donnarumma, Immacolata Doroshenko, Victor Dovčiak, Michal Ehlert, Steven R. Enoto, Teruaki EVANGELISTA, YURI FERRAZZOLI, RICCARDO Garcia, Javier A. Gunji, Shuichi Hayashida, Kiyoshi Heyl, Jeremy Iwakiri, Wataru Jorstad, Svetlana G. Karas, Vladimir Kitaguchi, Takao Kolodziejczak, Jeffery J. Krawczynski, Henric LA MONACA, Fabio Latronico, Luca Liodakis, Ioannis Maldera, Simone Manfreda, Alberto Marin, Frédéric Marinucci, Andrea Marscher, Alan P. Marshall, Herman L. Mitsuishi, Ikuyuki Mizuno, Tsunefumi Ng, C.-Y. O’Dell, Stephen L. Omodei, Nicola Oppedisano, Chiara PAPITTO, ALESSANDRO Pavlov, George G. Peirson, Abel L. PERRI, Matteo Pesce-Rollins, Melissa Petrucci, Pierre-Olivier PILIA, Maura POSSENTI, ANDREA Puccetti, Simonetta Ramsey, Brian D. RANKIN, John RATHEESH, AJAY Romani, Roger W. Sgrò, Carmelo Slane, Patrick Spandre, Gloria Tamagawa, Toru TAVECCHIO, Fabrizio Taverna, Roberto Tawara, Yuzuru Tennant, Allyn F. Thomas, Nicholas E. TOMBESI, Francesco TROIS, ALESSIO Tsygankov, Sergey S. Turolla, Roberto Vink, Jacco Weisskopf, Martin C. XIE, FEI Zane, Silvia |
Issue Date: | 2023 |
Journal: | THE ASTROPHYSICAL JOURNAL |
Number: | 943 |
Issue: | 2 |
First Page: | 129 |
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. |
URI: | http://hdl.handle.net/20.500.12386/34511 |
URL: | https://iopscience.iop.org/article/10.3847/1538-4357/acae88 https://api.elsevier.com/content/abstract/scopus_id/85147750062 |
ISSN: | 0004-637X |
DOI: | 10.3847/1538-4357/acae88 |
Bibcode ADS: | 2023ApJ...943..129C |
Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista
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