Results 1 to 10 of about 1,353 (120)
Characterization of a lobster-eye type X-ray telescope [PDF]
EPJ Web of Conferences, 2022 Lobster-eye type X-ray telescopes use reflecting plano mirrors under grazing incidence and can observe a large field of view. As part of a Bavarian-Czech cooperation, two telescopes were build, equipped with mirrors coated with gold and iridium.
Döhring Thorsten +5 more
doaj +1 more source
Simulation of a Simple Wolter Telescope of Type I by Geant4 for Some Widely Used Materials [PDF]
Iranian Journal of Astronomy and Astrophysics, 2020 At the present work, the reflection of X-rays from surfaces composed of silicon, gold, iridium, and nickel is simulated in the range of E ≤ 5 keV energy for the two cases, which includes raw mirror surfaces and a typical Wolter-I optics-based X-ray ...
Mehdi Abbasian Motlagh +1 more
doaj +1 more source
Target Detection Framework for Lobster Eye X-Ray Telescopes with Machine-learning Algorithms
The Astrophysical Journal Supplement Series, 2023 Lobster eye telescopes are ideal monitors to detect X-ray transients because they could observe celestial objects over a wide field of view in the X-ray band.
Peng Jia, Wenbo Liu, Yuan Liu, Haiwu Pan
doaj +1 more source
Design and testing of a Kirkpatrick-Baez optics variation [PDF]
EPJ Web of Conferences, 2022 Beside Wolter I X-ray optics, which are used at most in currently operating X-ray space telescopes, there exist also other optical designs and their usability for space observations is still the matter of studies.
Stieglitz Veronika +4 more
doaj +1 more source
The Cycles of Alpha Centauri: Double Dipping of AB
The Astronomical Journal, 2023 In mid-2023, the Sunlike dwarfs of nearby α Centauri (HD 128620 (“A”): G2 V; HD 128621 (“B”): K1 V; hereafter “AB”) coincidentally both entered coronal ( T ≈ 1–3 MK) low states in their long-term X-ray cycles, as captured by the Chandra Observatory and ...
Thomas Ayres
doaj +1 more source
Equalizing the Pixel Response of the Imaging Photoelectric Polarimeter Onboard the IXPE Mission
The Astronomical Journal, 2023 The Gas Pixel Detector is a gas detector, sensitive to the polarization of X-rays, currently flying onboard the Imaging X-ray Polarimetry Explorer (IXPE)—the first observatory dedicated to X-ray polarimetry.
John Rankin +20 more
doaj +1 more source
Searching for Axion-Like Particles with X-ray Polarimeters
Galaxies, 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
Spectral Energy Distributions of Southern Binary X-Ray Sources
The Astrophysical Journal Supplement Series, 2023 The rapid variability of X-ray binaries (XRBs) produces a wide range of X-ray states that are linked to activity across the electromagnetic spectrum. It is particularly challenging to study a sample of sources large enough to include all types in their ...
John M. Dickey +7 more
doaj +1 more source
An extraordinary view of the universe: The use of X-ray vision in space science
Mètode Science Studies Journal: Annual Review, 2017 X-ray emission from cosmic sources indicates that these sources are heated to temperatures exceeding a million degrees or that they contain highly energetic particles.
Aneta Siemiginowska
doaj +1 more source
Handling the Background in IXPE Polarimetric Data
The Astronomical Journal, 2023 Imaging X-ray Polarimetry Explorer (IXPE) is a Small Explorer mission by NASA and Agenzia Spaziale Italiana, launched on 2021 December 9, dedicated to investigating X-ray polarimetry allowing angular-, time-, and energy-resolved observations in the 2–8 ...
Alessandro Di Marco +20 more
doaj +1 more source