Results 81 to 90 of about 4,968 (216)

Astrometry with Schmidt Telescopes [PDF]

open access: yesInternational Astronomical Union Colloquium, 1984
Photographic astrometry, including work with Schmidt telescopes, can be divided into two main fields, (i) the measurement of positions of objects relative to a reference frame of stars with known celestial coordinates, and (ii) the measurement of relative proper motions and trigonometric parallaxes from a series of plates taken on the same field.
openaire   +2 more sources

Pulsar Astrometry

open access: yesSymposium - International Astronomical Union, 1981
The 35-km interferometer at NRAO was used at 2.7 GHz during 1974–1979 to determine pulsar proper motions. Observations from each epoch were reduced to pseudo-position vector offsets which include both unknown, and constant, absolute position errors for the pulsars and their reference sources, as well as the time-varying proper motion of the pulsars ...
D. C. Backer, R. A. Sramek
openaire   +2 more sources

VLBI Astrometry [PDF]

open access: yesSymposium - International Astronomical Union, 1994
VLBI is at present the most accurate technique for measuring radiosource positions and the only method capable of high precision for a reasonable number of sources. The applications of VLBI astrometry in stellar, Galactic and extra-Galactic regimes are reviewed.
openaire   +1 more source

Observational Data and Orbits of the Asteroids Discovered at the Baldone Observatory in 2008–2013

open access: yesOpen Astronomy, 2015
The paper presents statistics of the asteroids observed and discovered at the Baldone Observatory, Latvia, in 2008–2013 within the project for astrometric observations of the near-Earth objects (NEOs), the main belt asteroids and comets. CCD observations
Černis K., Wlodarczyk I., Eglitis I.
doaj   +1 more source

A Curated Dataset of Regional Meteor Events with Simultaneous Optical and Infrasound Observations (2006–2011)

open access: yesData
We present a curated, openly accessible dataset of 71 regional meteor events simultaneously recorded by optical and infrasound instrumentation between 2006 and 2011. These events were captured during an observational campaign using the all-sky cameras of
Elizabeth A. Silber   +3 more
doaj   +1 more source

Exoplanet search with astrometry [PDF]

open access: yesNew Astronomy Reviews, 2009
20 pages, 7 figures, contribution to the summerschool "Astrometry and Imaging with the Very Large Telescope Interferometer", 2 - 13 June, 2008, Keszthely ...
openaire   +3 more sources

Commission 8: Astrometry: (Astrometrie) [PDF]

open access: yesTransactions of the International Astronomical Union, 2002
E. Costa   +10 more
openaire   +2 more sources

ELSA and the Frontiers of Astrometry [PDF]

open access: yesEAS Publications Series, 2010
ELSA stands for the ambitious goal of `European Leadership in Space Astrometry'. In this closing contribution I will examine how the ELSA network has advanced this goal. I also look ahead to the time when the Gaia data will be published and consider what needs to be done to maintain European leadership.
openaire   +4 more sources

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