Results 11 to 20 of about 20,854 (100)

DEGRADATION OF THE REFLECTANCE PROPERTIES OF SOME GSS IN SPACE, PRELIMINARY RESULTS

open access: yesOdessa Astronomical Publications, 2020
A spacecraft in near-Earth orbit is exposed to extreme environmental factors, such as high vacuum, zero gravity, collisions with meteors and orbital debris, corpuscular and electromagnetic radiations, etc.
P. P. Sukhov, K. P. Sukhov
doaj   +1 more source

Searching for Jet Emission in LMXBs: A Polarimetric View

open access: yesGalaxies, 2017
We present results taken from a study aiming at detecting the emission from relativistic particles jets in neutron star-low mass X-ray binaries using optical polarimetric observations.
Maria Cristina Baglio   +3 more
doaj   +1 more source

TO THE PERSONALITIES OF THE UKRAINIAN ASTRONOMY: SCIENTIFIC WORK OF KOSTYANTYN SAVCHENKO

open access: yesOdessa Astronomical Publications, 2020
The research is devoted to the study of the life and work of the outstanding Ukrainian astronomer-the- oretician Kostyantyn Savchenko (1910–1956), who worked in the field of celestial mechanics and dynamic cos- mogony at the Kharkiv and Odesa ...
M. Balyshev, I. B. Vavilova
doaj   +1 more source

Analysis of development of open source initiative GIS

open access: yesВісник Астрономічної школи, 2014
The analysis of desktop GIS development is conducted, the evaluation of advantages and disadvantages of open GIS software and indicated models of penetration into market of open GIS software.
V. I. Zatserkovniy   +2 more
doaj   +1 more source

ON THE QUESTION OF THE HELIUM ABUNDANCE IN ORION A MEASURED BY RADIO RECOMBINATION LINES. AND THE PRIMORDIAL HELIUM ABUNDANCE

open access: yesOdessa Astronomical Publications, 2020
Recombination radio lines (RRLs) of hydrogen (H), helium (He-4), and carbon (C) are a powerful tool for studying the interstellar medium (ISM) in space.
A. P. Tsivilev
doaj   +1 more source

Algorithm 991 [PDF]

open access: yesACM Transactions on Mathematical Software, 2017
We present a new algorithm for the 2D sliding window discrete Fourier transform. Our algorithm avoids repeating calculations in overlapping windows by storing them in a tree data-structure based on the ideas of the Cooley-Tukey fast Fourier transform ...
Lee F. Richardson, W. Eddy
semanticscholar   +1 more source

Catalogue of comets passing through perihelion in 2015

open access: yesВісник Астрономічної школи, 2014
The catalog of 76 comets, passing the perihelion of its orbit in 2015. The catalog includes tables with circumstances of the passage of comets through perihelion, the elements of their orbits, and data concerning the discovery of comets.
K. I. Churyumov
doaj   +1 more source

DISCRETE X-RAY SOURCES IN GALAXY CLUSTERS

open access: yesOdessa Astronomical Publications, 2020
Current studies of extragalactic X-ray sources using data from orbital observatory XMM- Newton are at the front line of X-ray astronomy. Resolution capacity of the observatory instruments enable to detect separate X-ray sources in the close galaxies.
A. V. Tugay   +2 more
doaj   +1 more source

The X-ray and radio structure of extragalactic jets

open access: yesВісник Астрономічної школи, 2011
The internal structure of jets from active galaxies is explored using the X-ray and radio data. The transverse intensity distributions of X-ray knots in jet are calculated and compared with corresponding intensity distributions for radio knots.
V. V. Marchenko   +4 more
doaj   +1 more source

Pallasite meteorites: cosmic ray irradiation and shock-thermal history by the data of track and thermoluminescence analysis

open access: yesВісник Астрономічної школи, 2011
Pallasites are specific stony-iron class of meteorites are mixtures of olivine and Fe-Ni. Olivine is one of the suitable silicate mineral for registration heavy cosmic ray nuclei with help of chemically etched tracks.
A. I Ivliev   +4 more
doaj   +1 more source

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