| Title: |
Highly Significant Detection of X-Ray Polarization from the Brightest Accreting Neutron Star Sco X-1 |
| Authors: |
La Monaca, F; Di Marco, A; Poutanen, J; Bachetti, M; Motta, SE; Papitto, A; Pilia, M; Xie, F; Bianchi, S; Bobrikova, A; Costa, E; Deng, W; Ge, MY; Illiano, G; Jia, SM; Krawczynski, H; Lai, EV; Liu, K; Mastroserio, G; Muleri, F; Rankin, J; Soffitta, P; Veledina, A; Ambrosino, F; Del Santo, M; Chen, W; Garcia, JA; Kaaret, P; Russell, TD; Wei, WH; Zhang, SN; Zuo, C; Arzoumanian, Z; Cocchi, M; Gnarini, A; Farinelli, R; Gendreau, K; Ursini, F; Weisskopf, MC; Zane, S; Agudo, I; Antonelli, LA; Baldini, L; Baumgartner, WH; Bellazzini, R; Bongiorno, SD; Bonino, R; Brez, A; Bucciantini, N; Capitanio, F; Castellano, S; Cavazzuti, E; Chen, CT; Ciprini, S; De Rosa, A; Del Monte, E; Di Gesu, L; Di Lalla, N; Donnarumma, I; Doroshenko, V; Dovciak, M; Ehlert, SR; Enoto, T; Evangelista, Y; Fabiani, S; Ferrazzoli, R; Gunji, S; Hayashida, K; Heyl, J; Iwakiri, W; Jorstad, SG; Karas, V; Kislat, F; Kitaguchi, T; Kolodziejczak, JJ; Latronico, L; Liodakis, I; Maldera, S; Manfreda, A; Marin, F; Marinucci, A; Marscher, AP; Marshall, HL; Massaro, F; Matt, G; Mitsuishi, I; Mizuno, T; Negro, M; Ng, CY; O'Dell, SL; Omodei, N; Oppedisano, C; Pavlov, GG; Peirson, AL; Perri, M; Pesce-Rollins, M; Petrucci, PO; Possenti, A; Puccetti, S; Ramsey, BD; Ratheesh, A; Roberts, OJ; Romani, RW; Sgrò, C; Slane, P; Spandre, G; Swartz, DA; Tamagawa, T; Tavecchio, F; Taverna, R; Tawara, Y; Tennant, AF; Thomas, NE; Tombesi, F; Trois, A; Tsygankov, SS; Turolla, R; Vink, J; Wu, K |
| Publisher Information: |
American Astronomical Society; BRISTOL |
| Publication Year: |
2024 |
| Collection: |
University of Hong Kong: HKU Scholars Hub |
| Description: |
The Imaging X-ray Polarimetry Explorer measured with high significance the X-ray polarization of the brightest Z-source, Sco X-1, resulting in the nominal 2-8 keV energy band in a polarization degree of 1.0% +/- 0.2% and a polarization angle of 8(degrees) +/- 6(degrees) at a 90% confidence level. This observation was strictly simultaneous with observations performed by NICER, NuSTAR, and Insight-HXMT, which allowed for a precise characterization of its broadband spectrum from soft to hard X-rays. The source has been observed mainly in its soft state, with short periods of flaring. We also observed low-frequency quasiperiodic oscillations. From a spectropolarimetric analysis, we associate a polarization to the accretion disk at |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
Astrophysical Journal Letters; 15; WOS:001137090300001; https://hub.hku.hk/handle/10722/340787; 960 |
| DOI: |
10.3847/2041-8213/ad132d |
| Availability: |
https://hub.hku.hk/handle/10722/340787; https://doi.org/10.3847/2041-8213/ad132d |
| Rights: |
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. |
| Accession Number: |
edsbas.AE04102B |
| Database: |
BASE |