50 citations · 275 across the 25 of their papers we have counts for
10 papers · 1 filter
X-ray spectro-polarimetric characterization of GX 340+0 in the horizontal branch: a highly inclined source?
Fabio La Monaca, Alessandro Di Marco, Renee M. Ludlam +4
We report the first detection of X-ray polarization in the horizontal branch for GX 340+0 as obtained by Imaging X-ray Polarimetry Explorer (IXPE). A polarization degree of 4.3%$\p…
First spectropolarimetric observation of the neutron star low-mass X-ray binary GX 3+1
Andrea Gnarini, Ruben Farinelli, Francesco Ursini +11
We report the first simultaneous X-ray spectropolarimetric observation of the bright atoll neutron star low-mass X-ray binary GX 3+1, performed by the Imaging X-ray Polarimetry Exp…
The IXPE View of Neutron Star Low-Mass X-ray Binaries
Francesco Ursini, Andrea Gnarini, Fiamma Capitanio +9
Low-mass X-ray binaries hosting weakly magnetized neutron stars (NS-LMXBs) are among the brightest sources in the X-ray sky. Since 2021, the Imaging X-ray Polarimetry Explorer (IXP…
Polarized radiation from the spreading layer of the weakly magnetized neutron stars
Anna Bobrikova, Juri Poutanen, Vladislav Loktev
Observations show that the X-ray emission of the accreting weakly magnetized neutron stars is polarized. Here, we develop a theoretical model, where we assume the emission of the a…
Parameter constraints for accreting millisecond pulsars with synthetic NICER data
Bas Dorsman, Tuomo Salmi, Anna L. Watts +10
Pulse profile modelling (PPM) is a technique for inferring mass, radius and hotspot properties of millisecond pulsars. PPM is now regularly used for analysis of rotation-powered mi…
X-ray spectropolarimetry of the bright atoll Serpens X-1
F. Ursini, A. Gnarini, S. Bianchi +11
We present simultaneous X-ray polarimetric and spectral observations of the bright atoll source Ser~X-1 carried out with the Imaging X-ray Polarimetry Explorer (IXPE), NICER, and N…
Discovery of Polarized X-Ray Emission from the Accreting Millisecond Pulsar SRGA J144459.2-604207
Alessandro Papitto, Alessandro Di Marco, Juri Poutanen +22
We report on the discovery of polarized X-ray emission from an accreting millisecond pulsar. During a 10-day-long coverage of the February 2024 outburst of SRGA J144459.2-604207, t…
New polarimetric study of the galactic X-ray burster GX 13+1
Anna Bobrikova, Alessandro Di Marco, Fabio La Monaca +3
Weakly magnetized neutron stars (WMNS) are complicated sources with challenging phenomenology. For decades, they have been studied via spectrometry and timing. It has been establis…
X-Ray Polarimetry of the Dipping Accreting Neutron Star 4U 1624-49
M. Lynne Saade, Philip Kaaret, Andrea Gnarini +98
We present the first X-ray polarimetric study of the dipping accreting neutron star 4U 162449 with the Imaging X-ray Polarimetry Explorer (IXPE). We report a detection of polari…
Discovery of a strong rotation of the X-ray polarization angle in the galactic burster GX 13+1
Anna Bobrikova, Sofia V. Forsblom, Alessandro Di Marco +106
Weakly magnetized neutron stars in X-ray binaries show complex phenomenology with several spectral components that can be associated with the accretion disk, boundary and/or spread…