Results 21 to 30 of about 808 (168)

The Instrument of the Imaging X-Ray Polarimetry Explorer

open access: yesThe Astronomical Journal, 2021
Abstract While X-ray spectroscopy, timing, and imaging have improved much since 1962 when the first astronomical nonsolar source was discovered, especially wi the launch of the Newton/X-ray Multi-Mirror Mission, Rossi/X-ray Timing Explorer, and Chandra/Advanced X-ray Astrophysics Facility, the progress of X-ray polarimetry has been ...
Paolo Soffitta   +80 more
openaire   +5 more sources

Photoelectric Polarimetry and the Gas Pixel Detector Yesterday, Today and Tomorrow

open access: yesGalaxies, 2018
Since the very beginning of X-ray Astronomy, polarimetry has been suggested as a tool of diagnostics, of great potentiality. While almost all measurements of X-rays were based on detectors using the photoelectric effect, the first attempt to perform ...
Enrico Costa
doaj   +1 more source

IXPE Observations of the Quintessential Wind-accreting X-Ray Pulsar Vela X-1

open access: yesThe Astrophysical Journal Letters, 2023
The radiation from accreting X-ray pulsars was expected to be highly polarized, with some estimates for the polarization degree of up to 80%. However, phase-resolved and energy-resolved polarimetry of X-ray pulsars is required in order to test different ...
Sofia V. Forsblom   +100 more
doaj   +1 more source

X-ray Polarimetry

open access: yes, 2021
Preprint of an article to appear in The WSPC Handbook of Astronomical Instrumentation, David Burrows (ed.), copyright World Scientific Publishing Company.
openaire   +2 more sources

A deep ensemble approach to X-ray polarimetry

open access: yesCoRR, 2021
X-ray polarimetry will soon open a new window on the high energy universe with the launch of NASA's Imaging X-ray Polarimetry Explorer (IXPE). Polarimeters are currently limited by their track reconstruction algorithms, which typically use linear estimators and do not consider individual event quality.
A. L. Peirson, R. W. Romani
openaire   +2 more sources

An unfolding method for X-ray spectro-polarimetry [PDF]

open access: yesAstroparticle Physics, 2015
12 pages, 7 figures, accepted for publication in Astropart ...
Kislat, Fabian   +4 more
openaire   +2 more sources

X-ray polarimetry of X-ray pulsar X Persei: another orthogonal rotator?

open access: yesMonthly Notices of the Royal Astronomical Society, 2023
ABSTRACT X Persei is a persistent low-luminosity X-ray pulsar of period of ≈ 835 s in a Be binary system. The field strength at the neutron star surface is not known precisely, but indirect signs indicate a magnetic field above 1013 G, which makes the object one of the most magnetized known X-ray pulsars.
Mushtukov, A A   +106 more
openaire   +9 more sources

Searching for Axion-Like Particles with X-ray Polarimeters

open access: yesGalaxies, 2018
X-ray telescopes are an exceptional tool for searching for new fundamental physics. In particular, X-ray observations have already placed world-leading bounds on the interaction between photons and axion-like particles (ALPs).
Francesca Day, Sven Krippendorf
doaj   +1 more source

Galactic X-ray Polarimetry and High-Resolution X-ray Spectroscopy [PDF]

open access: yesSymposium - International Astronomical Union, 1973
Stellar X-ray spectroscopy and polarimetry are discussed in terms of the source parameters that can be determined through such studies and in terms of the constraints that these studies will place on theoretical models. The spectroscopic and polarimetric results that have been obtained to date are reviewed.
openaire   +1 more source

The enhanced X-ray Timing and Polarimetry mission—eXTP [PDF]

open access: yesScience China Physics, Mechanics & Astronomy, 2018
In this paper we present the enhanced X-ray Timing and Polarimetry mission - eXTP. eXTP is a space science mission designed to study fundamental physics under extreme conditions of density, gravity and magnetism. The mission aims at determining the equation of state of matter at supra-nuclear density, measuring effects of QED, and understanding the ...
Zhang, ShuangNan   +152 more
openaire   +9 more sources

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