Results 31 to 40 of about 292,162 (290)

Receiving vectors of muon telescope of cosmic ray station Novosibirsk

open access: yesSolar-Terrestrial Physics, 2016
The method of receiving vectors allows us to determine cosmic ray anisotropy at every moment of time. Also, the method makes it possible to study fast anisotropy fluctuations related to the interplanetary medium dynamics.
Yanchukovsky V.L.   +4 more
doaj   +1 more source

First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring [PDF]

open access: yesAstrophysical Journal, 2019
The Event Horizon Telescope (EHT) has mapped the central compact radio source of the elliptical galaxy M87 at 1.3 mm with unprecedented angular resolution. Here we consider the physical implications of the asymmetric ring seen in the 2017 EHT data.
K. Akiyama   +220 more
semanticscholar   +1 more source

The eROSITA X-ray telescope on SRG [PDF]

open access: yesAstronomy & Astrophysics, 2020
eROSITA (extended ROentgen Survey with an Imaging Telescope Array) is the primary instrument on the Spectrum-Roentgen-Gamma (SRG) mission, which was successfully launched on July 13, 2019, from the Baikonour cosmodrome.
P. Predehl   +92 more
semanticscholar   +1 more source

The Australia Telescope National Facility Pulsar Catalogue [PDF]

open access: yes, 2003
We have compiled a new and complete catalog of the main properties of the 1509 pulsars for which published information currently exists. The catalog includes all spin-powered pulsars, as well as anomalous X-ray pulsars and soft gamma-ray repeaters ...
R. Manchester   +3 more
semanticscholar   +1 more source

First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole [PDF]

open access: yesAstrophysical Journal, 2019
We present the first Event Horizon Telescope (EHT) images of M87, using observations from April 2017 at 1.3 mm wavelength. These images show a prominent ring with a diameter of ~40 μas, consistent with the size and shape of the lensed photon orbit ...
K. Akiyama   +214 more
semanticscholar   +1 more source

The European Solar Telescope [PDF]

open access: yesAstronomy & Astrophysics, 2022
The European Solar Telescope (EST) is a project aimed at studying the magnetic connectivity of the solar atmosphere, from the deep photosphere to the upper chromosphere.
C. Noda   +17 more
semanticscholar   +1 more source

Wishing for the Watch Face in Jonathan Swift’s “The Progress of Beauty”

open access: yesABO : Interactive Journal for Women in the Arts 1640-1830, 2018
This article illuminates the technological underpinnings of Jonathan Swift’s satire, “The Progress of Beauty” (1719), by exploring how eighteenth-century poetics of beauty and scientific progress pit human against automaton.
Jantina Ellens
doaj   +1 more source

High-Efficiency, 80 mm Aperture Metalens Telescope. [PDF]

open access: yesNano letters (Print), 2022
Metalenses promise potential for a paradigm shift of conventional optical devices. However, the aperture sizes of metalenses are usually bound within hundreds of micrometers by the commonly used fabrication methods, limiting their usage on practical ...
Lidan Zhang   +7 more
semanticscholar   +1 more source

Fermi Large Area Telescope Fourth Source Catalog [PDF]

open access: yesAstrophysical Journal Supplement Series, 2019
We present the fourth Fermi Large Area Telescope catalog (4FGL) of γ-ray sources. Based on the first eight years of science data from the Fermi Gamma-ray Space Telescope mission in the energy range from 50 MeV to 1 TeV, it is the deepest yet in this ...
S. Abdollahi   +167 more
semanticscholar   +1 more source

Modified Method to Detect the Turbulent Layers in the Atmospheric Boundary Layer for the Large Solar Vacuum Telescope

open access: yesAtmosphere, 2021
A method to detect the atmospheric turbulent layers using a single Shack–Hartmann wavefront sensor is discussed. In order to determine the height distribution of the atmospheric turbulence above a telescope, we register the wavefront distortions at ...
Artem Yurievich Shikhovtsev   +6 more
doaj   +1 more source

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