X-Ray and Radio Polarimetry of the Neutron Star Low-mass X-Ray Binary GX 13+1
The Astrophysical JournalWe report the X-ray and radio polarization study of the neutron star low-mass X-ray binary (LMXB) GX 13+1 using the Imaging X-ray Polarimetry Explorer (IXPE) and Very Large Array.
Unnati Kashyap +5 more
doaj +1 more source
Modeling Fast X-Ray Variability around an Accreting Black Hole
The Astrophysical JournalX-ray interband time lags are observed during the outbursts of black hole X-ray binaries. Timing analysis of fast variability in low Fourier frequency bands shows that high-energy photons lag behind low-energy photons, a phenomenon referred to as hard ...
Yejing Zhan +4 more
doaj +1 more source
Instruments for Focal Plane X-Ray Polarimetry in the Next Decade
ParticlesThe successful detection of X-ray polarization from many celestial sources belonging to different classes by the IXPE mission has opened a new window in X-ray astronomy. While an impressive number of scientific topics have already been addressed by IXPE,
Fabio Muleri +20 more
doaj +1 more source
X-Ray Polarimetric Observations of the Western Hotspot of Pictor A
The Astrophysical Journal LettersWe present the results of the analysis of a ∼2 Msec spectropolarimetric observation of the western hotspot (WHS) of the radio galaxy Pictor A. This is the brightest extragalactic radio source that allows us to carry out spatially resolved observations ...
Stefano Tugliani +12 more
doaj +1 more source
X-Ray Polarization Study of the Neutron Star Low-mass X-Ray Binary GX 349+2
The Astrophysical JournalWe report the first X-ray polarimetric results of the neutron star (NS) low-mass X-ray binary Z-source GX 349+2 using the Imaging X-ray Polarimetry Explorer (IXPE). We discovered that the X-ray source was polarized at a polarization degree of PD = 1.1% ±
Unnati Kashyap +5 more
doaj +1 more source
X-ray Polarization of Blazars and Radio Galaxies Measured by the Imaging X-ray Polarimetry Explorer
GalaxiesX-ray polarization, which now can be measured by the Imaging X-ray Polarimetry Explorer (IXPE), is a new probe of jets in the supermassive black hole systems of active galactic nuclei (AGNs).
Alan P. Marscher +6 more
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Magnetic Field Geometry of the Gamma-Ray Binary PSR B1259–63 Revealed via X-Ray Polarization
The Astrophysical Journal LettersSome X-ray binaries containing an energetic pulsar in orbit around a normal star accelerate particles to high energies in the shock cone formed where the pulsar and stellar winds collide.
Philip Kaaret +8 more
doaj +1 more source
IXPE Detection of Highly Polarized X-Rays from the Magnetar 1E 1841-045
The Astrophysical Journal LettersThe Imaging X-ray Polarimetry Explorer (IXPE) observed for the first time highly polarized X-ray emission from the magnetar 1E 1841−045, targeted after a burst-active phase in 2024 August.
Michela Rigoselli +14 more
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Graph neural networks trained on null signal for angle reconstruction in x-ray polarimetry
Machine Learning: Science and TechnologyScientific real detectors often produce sparse, irregular data defined on non-Euclidean domains, where conventional convolutional neural networks (CNNs) impose geometric biases that distort physical observables. In x-ray polarimetry, such distortions can
Vittorio Latorre +5 more
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X-Ray Polarization from the Gamma-Ray Binary LS I +61° 303
The Astrophysical JournalThe gamma-ray-emitting binary stellar system LS I +61° 303 was observed with the Imaging X-ray Polarimetry Explorer on two successive orbits over orbital phases of 0.74–1.05.
Philip Kaaret +7 more
doaj +1 more source