Results 21 to 30 of about 762 (173)

The X-ray polarimetry window reopens [PDF]

open access: yesNature Astronomy, 2020
PolarLight is the first dedicated soft X-ray polarimeter in space since the 1970s and is attempting to reopen this long-awaited window in astronomy, explain Principal Investigator Hua Feng and Ronaldo Bellazzini.
Hua Feng, Ronaldo Bellazzini
openaire   +2 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

X-ray Polarimetry-Timing

open access: yes, 2023
X-ray polarimetry-timing is the characterization of rapid variability in the X-ray polarization degree and angle. As for the case of spectral-timing, it provides causal information valuable for reconstructing indirect maps of the vicinity of compact objects. To call X-ray polarimetry-timing a young field is somewhat of an understatement, given that the
openaire   +2 more sources

Scientific prospects for hard X-ray polarimetry [PDF]

open access: yesAstroparticle Physics, 2011
X-ray polarimetry promises to give qualitatively new information about high-energy sources. Examples of interesting source classes are binary black hole systems, rotation and accretion powered neutron stars, Microquasars, Active Galactic Nuclei and Gamma-Ray Bursts. Furthermore, X-ray polarimetry affords the possibility for testing fundamental physics,
Krawczynski, H.   +6 more
openaire   +2 more sources

Deep ensemble analysis for Imaging X-ray Polarimetry [PDF]

open access: yesNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2021
18 pages, 9 figures.
Peirson, A. L.   +4 more
openaire   +2 more sources

The Growth of Interest in Astronomical X-Ray Polarimetry

open access: yesGalaxies, 2018
Astronomical X-ray polarimetry was first explored in the end of the 1960s by pioneering rocket instruments. The craze arising from the first discoveries of stellar and supernova remnant X-ray polarization led to the addition of X-ray polarimeters to ...
Frédéric Marin
doaj   +1 more source

An Overview of X-Ray Polarimetry of Astronomical Sources

open access: yesGalaxies, 2018
We review the history of astronomical X-ray polarimetry based on the author’s perspective, beginning with early sounding-rocket experiments by Robert Novick at Columbia University and his team, of which the author was a member.
Martin C. Weisskopf
doaj   +1 more source

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

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