Results 1 to 10 of about 58,437 (310)

Measuring chandler wobble amplitude variations using IERS EOP C04 data [PDF]

open access: yesSerbian Astronomical Journal, 2023
We analyzed the Earth's long-term polar motion using the time series IERS EOP C04 (International Earth Rotation and Reference Systems Service - IERS; Earth Orientation Parameters - EOP; Combination of four (04) techniques - C04), from 1984 to ...
Damljanović G., Vasilić V.
doaj   +1 more source

Artificial Star Test for Crowded Field CCD Photometry

open access: yesOpen Astronomy, 2015
A new method of performing an artificial star test (AST) for crowded field stellar CCD photometry is proposed. This AST method is superior in the cases when it is necessary to account for varying photometric quality across the study field, arising due to
Stonkutė R., Vansevičius V.
doaj   +1 more source

Milton, Anon e prosódia na "Trilogia dos Gigantes" [PDF]

open access: yesPessoa Plural, 2021
Neste contributo investigam-se possíveis referências do projecto pessoano póstumo intitulado “Trilogia dos Gigantes” a partir da Biblioteca Particular de Fernando Pessoa – apresentam-se títulos que se debruçam sobre a mitologia grega e os Gigantes em ...
Filipe, Teresa, Ferrari, Patricio
doaj   +1 more source

RESULTS OF PROCESSING OF ASTRONEGATIVES WITH COMMERCIAL SCANNER

open access: yesOdessa Astronomical Publications, 2014
Astrometric errors depending on the method of scanning with different spatial resolutions were studied  with commercial scanner such as   Epson Perfection V750 Pro.
Yu. I. Protsyuk   +3 more
doaj   +1 more source

Chandra Observations of the X-Ray Binary Population in the Field of the Dwarf Galaxy IC 10

open access: yesAstronomy
IC 10 is a dwarf galaxy in Cassiopeia, located at a distance of 660 kpc, and hosts a young stellar population, a large number of Wolf–Rayet stars, and a large number of massive stars in general.
Sayantan Bhattacharya   +3 more
doaj   +1 more source

SOFTWARE FOR PROCESSING OF DIGITIZED ASTRONEGATIVES FROM ARCHIVES AND DATABASES OF VIRTUAL OBSERVATORY

open access: yesOdessa Astronomical Publications, 2014
The paper discusses and illustrates the steps of  basic processing  of  digitized image of astro negatives. Software for  obtaining of a  rectangular coordinates and photometric values of objects on photographic plates was created in the environment ...
Yu. I. Protsyuk   +2 more
doaj   +1 more source

Search for quasar pairs with Gaia astrometric data

open access: yesAstronomy & Astrophysics
Quasar pairs, a special subclass of galaxy pairs, are valuable in the investigation of quasar interaction and clustering, the coevolution between the two quasars’ host galaxies, and the growth of supermassive black holes, as well as the formation and ...
Chen Qihang   +7 more
doaj   +3 more sources

20cm VLA radio-continuum study of M31: Images and point source catalogues [PDF]

open access: yesSerbian Astronomical Journal, 2012
We present a series of new high-sensitivity and high-resolution radio-continuum images of M31 at λ=20 cm (ν=1.4 GHz). These new images were produced by merging archived 20 cm radio-continuum observations from the Very Large Array (VLA) telescope.
Galvin T.J.   +5 more
doaj   +1 more source

Evaluation of the b Maps on the Faults of the Major (M > 7) South California Earthquakes

open access: yesEarth and Space Science
We use the Godano et al. (2022, https://doi.org/10.1029/2021ea002205) method for evaluating the b maps of the faults associated with the largest earthquakes M ≥ 7.0 that occurred in California.
V. Convertito, A. Tramelli, C. Godano
doaj   +1 more source

Gaia white dwarfs with infrared excess

open access: yesAstronomy & Astrophysics
Context. The presence of infrared (IR) excess flux observed in white dwarfs is related to the existence of debris disks or substellar companions. These systems provide important clues in studies of extrasolar planetary material and binary evolution ...
Murillo-Ojeda R.   +3 more
doaj   +1 more source

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