We detect a high level of polarization in the X-ray emission of the black-hole binary 4U 1630-47 in an observation with the Imaging X-ray Polarimetry Explorer. The 2-8 keV polarization degree is 8 % at a position angle of $18^\circ$, with the polarization degree increasing significantly with energy, from ~6 % at ~2 keV to ~ 11 % at ~8 keV. The continuum emission in the spectrum of simultaneous observations with the Neutron Star Interior Composition Explorer, NICER, is well described with only a thermal disc spectrum, with stringent upper limits to any Comptonized emission from the corona. Together with the lack of significant variability in the Fourier power spectrum, this suggests that the source was in the high-soft state at the time of these observations. The NICER spectrum reveals the presence of several absorption lines in the 6-9 keV band that we fit with two ionized absorbers, providing evidence of the presence of a strong disk wind, which supports the idea that the source was in the soft state. Previous measurements of X-ray polarization in other sources in harder states were associated with the corona or the jet in those systems. Given that the corona is significantly absent in this observation of 4U 1630-47, and that the jet in black-hole binaries is quenched in the high-soft state, we speculate that in this observation of 4U 1630-47, the polarization likely arises from the direct and reflected radiation of the accretion disk in this source.
Probing the emission geometry of the X-ray pulsar 2S 1417$-$624 during a weak outburst with NICER, IXPE, and NuSTAR
Institut für Astronomie und Astrophysik, Universität Tübingen（蒂宾根大学天文与天体物理研究所）；Research Center of Astronomy, QingHai University（青海大学天文研究中心）；Department of Physics and Astronomy, QingHai University（青海大学物理与天文系）；Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences（中国科学院高能物理研究所粒子天体物理重点实验室）；University of Chinese Academy of Sciences, Chinese Academy of Sciences（中国科学院大学）
Decoding Cygnus X-2: The Critical Role of Reflection in IXPE Data
Fudan University（复旦大学）；Eberhard-Karls Universität Tübingen（蒂宾根大学）；University of Warwick（华威大学）；Newcastle University（纽卡斯尔大学）；New Uzbekistan University（新乌兹别克斯坦大学）；University of Cambridge（剑桥大学）；INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna（意大利国家天体物理研究所博洛尼亚天文与空间科学观测站）；Wayne State University（韦恩州立大学）；University of Amsterdam（阿姆斯特丹大学）；Anton Pannekoek Institute for Astronomy, University of Amsterdam（阿姆斯特丹大学安东·范·佩内贝克克天文学研究所）；Astronomical Institute of the Czech Academy of Sciences（捷克科学院天文研究所）
Disk reflection as the origin of the X-ray polarization of NGC 4151 with IXPE
California Institute of Technology（加州理工学院）；Astronomical Institute of the Czech Academy of Sciences（捷克科学院天文研究所）；University of Crete（克里特大学）；Institute of Astrophysics, FORTH（FORTH天体物理研究所）；Università degli Studi Roma Tre（罗马三分大学）；Clemson University（克莱姆森大学）；INAF-Osservatorio Astronomico di Brera（INAF-布雷拉天文台）；NASA Goddard Space Flight Center（NASA戈达德太空飞行中心）
Discovery of Strong Energy-Dependent X-ray Polarization in the Intermediate State of GS 1354-64
Massachusetts Institute of Technology（麻省理工学院）；INAF Istituto di Astrofisica e Planetologia Spaziali（意大利国家天体物理研究所）；Center for Astrophysics | Harvard & Smithsonian（哈佛史密松尼天体物理中心）；Scuola Universitaria Superiore IUSS Pavia（帕维亚高等大学）；McGill University（麦吉尔大学）；Villanova University（维拉诺瓦大学）
IXPE Polarizations of the Lighthouse Pulsar, Trail, and Filament
Stanford University（斯坦福大学）；The University of Hong Kong（香港大学）；Istituto Nazionale di Fisica Nucleare, Sezione di Pisa（意大利国家核物理研究所，比萨分部）；The George Washington University（乔治华盛顿大学）；INAF Osservatorio Astrofisico di Arcetri（意大利国家天体物理研究所阿切特里天文台）；Università degli Studi di Firenze（佛罗伦萨大学）；Istituto Nazionale di Fisica Nucleare, Sezione di Firenze（意大利国家核物理研究所，佛罗伦萨分部）
Discovery of energy-dependent phase variations in the polarization angle of Cen X-3
State Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences（中国科学院高能物理研究所粒子天体物理国家重点实验室）；University of Chinese Academy of Sciences（中国科学院大学）；Department of Astronomy, University of Geneva（日内瓦大学天文系）
Pulse profile modelling of the 2024 outburst of the accreting millisecond pulsar SRGA J144459.2-604207
Anton Pannekoek Institute for Astronomy, University of Amsterdam（阿姆斯特丹大学安顿·潘内科克天文学研究所）；University of Helsinki（赫尔辛基大学）；Gravitation and Astroparticle Physics Amsterdam (GRAPPA), University of Amsterdam（阿姆斯特丹引力与高能物理研究所（GRAPPA））；McGill University（麦吉尔大学）；Trottier Space Institute, McGill University（麦吉尔大学特罗蒂尔太空研究所）；University of Turku（图尔库大学）；INAF Istituto di Astrofisica e Planetologia Spaziali（意大利国家天体物理学研究所）；Monash University（蒙纳士大学）；Institute for Globally Distributed Open Research and Education (IGDORE)（全球分布式开放研究与教育研究所）；University of Toulouse（图卢兹大学）；Università degli Studi di Roma “Tor Vergata”（罗马托维加塔大学）；Newcastle University（纽卡斯尔大学）；INAF Osservatorio Astronomico di Roma（意大利国家天体物理学研究所罗马天文台）；Nanjing University（南京大学）；Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education（教育部现代天体学与天体物理学重点实验室（南京大学））
Constraining the Corona Geometry of Cyg X-1 with Broad Band Spectrum and Polarimetric Analysis Based on Observations in May 2022
Hiroshima University（广岛大学）；National Institute of Technology, Ichinoseki College（国立技术研究所一关学院）；University of Durham（杜伦大学）；Graduate School of Advanced Science and Engineering, Hiroshima University（广岛大学先进理工学研究科）；Center for Computational Sciences, University of Tsukuba（筑波大学计算科学中心）
IXPE observation of the new magnetar source EP J223759.5+531421
University of Padova（帕多瓦大学）；INAF - Istituto di Astrofisica e Planetologia Spaziali（意大利国家天体物理研究所空间天体物理学和行星科学研究所）；Mullard Space Science Laboratory, University College London（伦敦大学学院穆拉德空间科学实验室）；European Space Agency (ESA), European Space Astronomy Centre (ESAC)（欧洲航天局（ESA）欧洲空间天文中心（ESAC））；Institute of Space Sciences (ICE), CSIC（西班牙高等科学研究理事会空间科学研究所（ICE））；Institut d’Estudis Espacials de Catalunya (IEEC)（加泰罗尼亚空间研究研究所（IEEC））；University School for Advanced Studies IUSS Pavia（帕维亚高等研究大学）
X-Ray Polarization from the Atoll 4U 1735-44 Suggests a Low Inclination
University of Turku（图尔库大学）；Nordic Optical Telescope（北欧光学望远镜）；NASA Marshall Space Flight Center（美国宇航局马歇尔太空飞行中心）；Università degli Studi Roma Tre（罗马第三大学）；INAF Istituto di Astrofisica e Planetologia Spaziali（意大利国家天体物理研究所空间天体物理学和行星科学研究所）
X-ray and Radio Campaign of the Z-source GX 340+0 II: the X-ray polarization in the normal branch
Tata Institute of Fundamental Research（塔塔基础研究所）；INAF, Istituto di Astrofisica Spaziale e Fisica Cosmica（意大利国家天体物理研究所，空间天体物理学与宇宙学研究所）；McGill University（麦吉尔大学）；Indian Institute of Astrophysics（印度天体物理研究所）；Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences（中国科学院高能物理研究所粒子天体物理重点实验室）；MIT Kavli Institute for Astrophysics and Space Research（麻省理工学院卡弗里天体物理学与空间研究学院）；Department of Physics, Indian Institute of Technology Hyderabad（印度技术学院海得拉巴分校物理系）；Eureka Scientific, Inc.（尤里卡科学公司）
X-ray polarization of Z-type neutron star low-mass X-ray binaries -- I. Model-independent, time-resolved X-ray polarimetry
Università degli Studi Roma Tre（罗马第三大学）；INAF – Istituto di Astrofisica e Planetologia Spaziali（意大利国家天体物理研究所）；INAF – Osservatorio Astronomico di Cagliari（意大利国家天体物理研究所卡利亚里天文台）；INAF – Osservatorio di Astrofisica e Scienza dello Spazio（意大利国家天体物理研究所空间科学天文台）
Discovery of High X-Ray Polarization from the Neutron Star Low-Mass X-Ray Binary Cyg X-2 in the Horizontal Branch
Università degli Studi Roma Tre（罗马三分大学）；NASA Marshall Space Flight Center（美国国家航空航天局马歇尔太空飞行中心）；Massachusetts Institute of Technology（麻省理工学院）；University of Turku（图尔库大学）；INAF–Osservatorio Astronomico di Brera（意大利国家天体物理研究所布雷拉天文台）；INAF–Istituto di Astrofisica e Planetologia Spaziali（意大利国家天体物理研究所天体物理学与行星科学研究所）
University of Lodz（罗兹大学）；Nordita, KTH Royal Institute of Technology and Stockholm University（诺迪塔，皇家理工学院和斯德哥尔摩大学）；Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences（波兰科学院尼古拉·哥白尼天文学中心）；Institute of Physics, University of Zielona Góra（热舒夫大学物理研究所）
Highly Polarized Intrinsic Emission and its Orthogonal Counterpart in Vela X-1
Guangxi University（广西大学）；Sun Yat-Sen University（中山大学）；Institute of High Energy Physics, Chinese Academy of Sciences（中国科学院高能物理研究所）；University of Chinese Academy of Sciences（中国科学院大学）
