scholarly journals Photometric Observations of Visual Double Stars by the Area Scanning Technique

1971 ◽  
Vol 5 ◽  
pp. 170-170
Author(s):  
Otto G. Franz
Keyword(s):  
Double Stars ◽  
Scanning Technique ◽  
Visual Double Stars ◽  
Photometric Observations ◽  
Visual Binaries

AbstractUBV magnitude differences in visual binaries are presented and their accuracy is discussed. Typical observed image profiles of double stars, including sample profiles of Antares, are shown. This contribution will appear jointly with the earlier one (p. 20) in Lowell Obs. Bull., No. 154. The work has been supported by NSF Grant GP-6983.

Photometric Observations of Visual Double Stars by the Area Scanning Technique

1965 ◽  
Vol 5 ◽  
pp. 170
Author(s):  
Otto G. Franz
Keyword(s):  
Double Stars ◽  
Scanning Technique ◽  
Visual Double Stars ◽  
Photometric Observations ◽  
Visual Binaries

AbstractUBV magnitude differences in visual binaries are presented and their accuracy is discussed. Typical observed image profiles of double stars, including sample profiles of Antares, are shown.This contribution will appear jointly with the earlier one (p. 20) inLowell Obs. Bull., No. 154. The work has been supported by NSF Grant GP-6983.

scholarly journals The Pulkovo Programme for the Study of Visual Double Stars

1990 ◽  
Vol 141 ◽  
pp. 63-64
Author(s):  
A. A. Kisselev ◽  
O. P. Bykov ◽  
O. A. Kalinichenko ◽  
O. V. Kiyaeva ◽  
L. G. Romanenko ◽  
...  
Keyword(s):  
Second World War ◽  
World War ◽  
Photographic Technique ◽  
Double Stars ◽  
Visual Double Stars ◽  
Traditional Work ◽  
Second World ◽  
Visual Binaries

The observation of visual double stars at Pulkovo is a traditional work of Pulkovo astronomers started by W. Struve in 1830 at Dorpat (now Tartu). After the Second World War and restoration of the observatory in 1960, the observations of double stars have been carried out with help of 26-inch Zeiss refractor using the photographic technique. We observe the visual binaries which satisfy the conditions of highest accuracy of astrometric reduction: d > 3′, m < 12.0, dm < 1.0, δ>20°.

scholarly journals UBV CCD Photometry of “Close” Visual Double Stars

1992 ◽  
Vol 135 ◽  
pp. 362-364
Author(s):  
E. Van Dessel ◽  
D. Sinachopoulos ◽  
P. Prado
Keyword(s):  
Ccd Cameras ◽  
Ccd Photometry ◽  
Astrophysical Interest ◽  
Double Stars ◽  
Visual Double Stars ◽  
Ubv Photometry ◽  
Visual Binaries

AbstractWe use the CCD cameras of the 61-cm UTSO and the 90-cm Dutch telescopes of the Las Campanas and European Southern Observatories respectively in order to perform UBV photometry of visual double stars.Our sample contains southern visual binaries with A–type (470 pairs) and G–type primaries (170 pairs), which have angular separations mainly between 1″.5 and 5″. The double stars of our sample have been selected from the WDS according to their astrophysical interest and the technological limits of contemporary CCDs.

scholarly journals On the Reduction of CCD Observations of “Close” Visual Binaries

1992 ◽  
Vol 135 ◽  
pp. 352-354
Author(s):  
D. Sinachopoulos
Keyword(s):  
Angular Separation ◽  
Double Stars ◽  
Visual Double Stars ◽  
Ccd Observations ◽  
Visual Binaries

AbstractWe discuss the accuracy of CCD astrometry, and we present an improvement on the method used for the photometric reduction of visual double stars CCD data, whenever the angular separation of the components is only a few arcseconds.

scholarly journals Spectroscopic observations of visual double stars

1986 ◽  
Vol 118 ◽  
pp. 425-427
Author(s):  
A. H. Batten
Keyword(s):  
Spectroscopic Observations ◽  
Double Stars ◽  
Visual Double Stars ◽  
Visual Binaries

Observations of visual binaries made with the 1.2-m telescope and coudé spectrograph at Victoria are described, with particular emphasis on their value as tests of evolutionary calculations.

Spectroscopic Observations of Visual Double Stars

1965 ◽  
Vol 5 ◽  
pp. 109-111
Author(s):  
Frederick R. West
Keyword(s):  
Radial Velocity ◽  
High Dispersion ◽  
Velocity Difference ◽  
Spectrograph Slit ◽  
Spectroscopic Observations ◽  
Double Stars ◽  
Visual Double Stars ◽  
Relative Orbit ◽  
Two Component ◽  
Star Images

There are certain visual double stars which, when close to a node of their relative orbit, should have enough radial velocity difference (10-20 km/s) that the spectra of the two component stars will appear resolved on high-dispersion spectrograms (5 Å/mm or less) obtainable by use of modern coudé and solar spectrographs on bright stars. Both star images are then recorded simultaneously on the spectrograph slit, so that two stellar components will appear on each spectrogram.

scholarly journals Fast Drift-Scan CCD Imaging and Photometry with Small Telescopes: Lunar Occultations and Speckle Interferometry

2001 ◽  
Vol 183 ◽  
pp. 309-314
Author(s):  
Jorge Núñez ◽  
Octavi Fors
Keyword(s):  
Data Analysis ◽  
Speckle Interferometry ◽  
Close Binary ◽  
Ccd Cameras ◽  
Ccd Imaging ◽  
Scanning Technique ◽  
Photometric Observations ◽  
Drift Scan ◽  
Fast Drift ◽  
Year 2000

AbstractIn this paper we show how inherent features of typical CCD cameras can be used for fast (in the order of milliseconds) photometric observations (FPO), even with submeter class telescopes. This is based on a modified drift-scanning technique which we show to be advantageous for such kind of observations. In particular, we successfully carried out some lunar occultations and speckle interferometry observations using this technique. During the year 2000, we registered several occultation events. In particular, we present the occultation of SAO79031. The millisecond photometry of the event allows us subsequent data analysis for stellar diameter estimation and close binary detection. We also show an example of the application of the technique to speckle interferometry observations. Finally, we present the main characteristics of our project to build a new remotely controlled observatory near Barcelona.

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