Polarized x-rays from a magnetar
Journal
Date Issued
2022
Author(s)
Taverna, Roberto
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Turolla, Roberto
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Heyl, Jeremy
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Zane, Silvia
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Baldini, Luca
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González-Caniulef, Denis
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•
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Caiazzo, Ilaria
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Di Lalla, Niccolò
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Doroshenko, Victor
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Errando, Manel
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Gau, Ephraim
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Kırmızıbayrak, Demet
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Krawczynski, Henric
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Negro, Michela
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Ng, Mason
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Omodei, Nicola
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Tamagawa, Toru
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Uchiyama, Keisuke
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Weisskopf, Martin C.
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Agudo, Ivan
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Baumgartner, Wayne H.
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Bellazzini, Ronaldo
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Bianchi, Stefano
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Bongiorno, Stephen D.
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Bonino, Raffaella
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Brez, Alessandro
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•
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Castellano, Simone
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Cavazzuti, Elisabetta
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Ciprini, Stefano
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•
•
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Di Gesu, Laura
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Donnarumma, Immacolata
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Dovčiak, Michal
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Ehlert, Steven R.
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Enoto, Teruaki
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•
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Garcia, Javier A.
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Gunji, Shuichi
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Hayashida, Kiyoshi
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Iwakiri, Wataru
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Jorstad, Svetlana G.
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Karas, Vladimir
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Kitaguchi, Takao
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Kolodziejczak, Jeffery J.
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Latronico, Luca
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Liodakis, Ioannis
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Maldera, Simone
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Manfreda, Alberto
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Marin, Frédéric
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Marinucci, Andrea
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Marscher, Alan P.
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Marshall, Herman L.
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Mitsuishi, Ikuyuki
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Mizuno, Tsunefumi
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Ng, Stephen C. -Y.
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O’Dell, Stephen L.
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Oppedisano, Chiara
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Pavlov, George G.
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Peirson, Abel L.
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Pesce-Rollins, Melissa
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Poutanen, Juri
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Puccetti, Simonetta
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Ramsey, Brian D.
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Romani, Roger W.
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Sgrò, Carmelo
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Slane, Patrick
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Spandre, Gloria
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Tawara, Yuzuru
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Tennant, Allyn F.
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Thomas, Nicholas E.
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Tsygankov, Sergey S.
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Vink, Jacco
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Wu, Kinwah
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Abstract
Magnetars are neutron stars with ultrastrong magnetic fields, which can be observed in x-rays. Polarization measurements could provide information on their magnetic fields and surface properties. We observed polarized x-rays from the magnetar 4U 0142+61 using the Imaging X-ray Polarimetry Explorer and found a linear polarization degree of 13.5 ± 0.8% averaged over the 2– to 8–kilo–electron volt band. The polarization changes with energy: The degree is 15.0 ± 1.0% at 2 to 4 kilo–electron volts, drops below the instrumental sensitivity ~4 to 5 kilo–electron volts, and rises to 35.2 ± 7.1% at 5.5 to 8 kilo–electron volts. The polarization angle also changes by 90° at ~4 to 5 kilo–electron volts. These results are consistent with a model in which thermal radiation from the magnetar surface is reprocessed by scattering off charged particles in the magnetosphere....
Volume
378
Issue
6620
Start page
646
Issn Identifier
0036-8075
Rights
open.access
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