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IXPE and XMM-Newton Observations of the Soft Gamma Repeater SGR 1806-20
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SYSNO ASEP 0576951 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title IXPE and XMM-Newton Observations of the Soft Gamma Repeater SGR 1806-20 Author(s) Turolla, R. (IT)
Taverna, R. (IT)
Israel, G. L. (IT)
Dovčiak, Michal (ASU-R) RID, ORCID
Karas, Vladimír (ASU-R) RID, ORCIDNumber of authors 99 Article number 88 Source Title Astrophysical Journal - ISSN 0004-637X
Roč. 954, č. 1 (2023)Number of pages 9 s. Publication form Online - E Language eng - English Country GB - United Kingdom Keywords neutron stars ; magnetars ; polarimetry OECD category Astronomy (including astrophysics,space science) Method of publishing Open access Institutional support ASU-R - RVO:67985815 UT WOS 001059343900001 EID SCOPUS 85170101253 DOI https://doi.org/10.3847/1538-4357/aced05 Annotation We report on the joint IXPE and XMMNewton observations of the soft.-repeater SGR 1806-20. The spectral and timing properties of SGR 1806-20 derived from XMM-Newton data are in broad agreement with previous measurements, however, we found the source at an alltime low persistent flux level. No significant polarization was measured apart from the 4-5 keV energy range, where a probable detection with PD= 31.6%+/- 10.5% and PA =17 6(-15.degrees 0)(+. 15.degrees 0) was obtained. The resulting polarization signal, together with the upper limits we derive at lower and higher energies (2-4 and 5-8 keV, respectively), is compatible with a picture in which thermal radiation from the condensed star surface is reprocessed by resonant Compton scattering in the magnetosphere, similar to what was proposed for the bright magnetar 4U 0142+61. Workplace Astronomical Institute Contact Anežka Melichárková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2024 Electronic address https://hdl.handle.net/11104/0347332
Number of the records: 1