Results 91 to 100 of about 30,911 (193)

Radio Astrometry [PDF]

The utilization of conventional and VLBI interferometer techniques for accurate determination of UTI, polar motion, and radio source position catalog data is ...
Johnston, K. J.
core   +1 more source

Observational data and orbits of the asteroids discovered at the Molėtai Observatory in 2010–2012

Open Astronomy, 2017
This paper is devoted to the discovery of asteroids at the Molėtai Astronomical Observatory (MAO) in 2010- 2012 together with the orbital analysis of two dynamically interesting Near Earth Objects (NEOs) discovered at the MAO, namely 2006 SF77 and 2010 ...
Włodarczyk Ireneusz, Černis Kazimieras, Zdanavičius Justas   +2 more
doaj   +1 more source

Sub-milliarcsecond precision spectro-astrometry of Be stars

, 2008
The origin of the disks around Be stars is still not known. Further progress requires a proper parametrization of their structure, both spatially and kinematically. This is challenging as the disks are very small. Here we assess whether a novel method is
A. M. Parr, Bailey, Baines, Baines, Carciofi, Carciofi, D. Baines, Dachs, Dachs, Dougherty, Dougherty, Frémat, Grundstrom, Hinkle, Hinkle, J. M. Porter, Jarad, Koornneef, Marlborough, Meilland, Poeckert, Porter, Porter, Quirrenbach, R. D. Oudmaijer, Schnerr, Straizys, Struve, Takami, Tycner, Vakili, Wallace, Whelan   +32 more
core   +1 more source

Precision Astrometry with the Very Long Baseline Array: Parallaxes and Proper Motions for 14 Pulsars

, 2009
Astrometry can bring powerful constraints to bear on a variety of scientific questions about neutron stars, including their origins, astrophysics, evolution, and environments.
A. G. Lyne, Arras, Arzoumanian, Beasley, Blazek, Bridle, Briggs, Brisken, Brisken, Brisken, Brisken, Chatterjee, Chatterjee, Chatterjee, Cordes, Cordes, Cornwell, Dame, De Luca, de Zeeuw, Deller, E. B. Fomalont, Faucher-Giguère, Fey, Fomalont, Fomalont, Fomalont, Haffner, Harrison, Helfand, Hoogerwerf, J. M. Cordes, Janka, Kaplan, Kaplan, Kaplan, Kaplan, Kramer, Lai, M. Kramer, Ma, Migliazzo, Ng, Ng, Petrov, Romney, S. Chatterjee, S. E. Thorsett, Socrates, Splaver, Standish, T. J. W. Lazio, Thorsett, Toscano, Verbiest, Vlemmings, W. F. Brisken, W. H. T. Vlemmings, W. M. Goss, Walker, Walker, Walter, Winkler, Zeiger   +63 more
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Commission 8: Astrometry: (Astrometrie) [PDF]

Transactions of the International Astronomical Union, 2002
Wenjing Jin, Imants Platais, E. Costa, C. Ducourant, I. Kumkova, M.G. Lattanzi, C. Lu, S. Röser, E. Schilbach, H. Schwan, R. Stone   +10 more
openaire   +1 more source

Measuring the Atmospheric Influence on Differential Astrometry: a Simple Method Applied to Wide Field CCD Frames

, 1996
Sets of short exposure, guided CCD frames are used to measure the noise added by the atmosphere to differential astrometric observations. Large nightly variations that are correlated with the seeing have been found in the data obtained over 2 years at ...
Zacharias, N.
core   +1 more source

Connecting VLBI and Gaia celestial reference frames

Frontiers in Astronomy and Space Sciences, 2016
The current state of the link problem between radio and optical celestial reference frames is considered.The main objectives of the investigations in this direction during the next few years are the preparation of a comparisonand the mutual orientation ...
Zinovy Malkin
doaj   +1 more source

RESULTS OF PROCESSING OF ASTRONEGATIVES WITH COMMERCIAL SCANNER

Odessa 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, O. E. Kovylianska, S. V. Protsyuk, V. N. Andruk   +3 more
doaj   +1 more source

Photometric Analysis of Pi of the Sky Data

Acta Polytechnica, 2013
Two fully automatic Pi of the Sky detectors with a large field of view, located in Spain (INTA) and in Chile (SPDA) observe the sky in search of rare optical phenomena, and also collect observations which include many kinds of variable stars.
Rafał Opiela, Katarzyna Małek, Lech Mankiewicz, Małgorzata Siudek, Marcin Sokołowski, Aleksander Filip Żarnecki   +5 more
doaj  

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

Odessa 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, L. V. Kazantseva, V. N. Andruk   +2 more
doaj   +1 more source