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J/A+A/367/865       Speckle observations of binary systems   (Prieur+ 2001)

Speckle observations of binary systems measured by Hipparcos Prieur J.L., Oblak E., Lampens P., Kurpinska-Winiarska M., Aristidi E., Koechlin L., Ruymakers G. <Astron. Astrophys. 367, 865 (2001)> =2001A&A...367..865P
ADC_Keywords: Stars, double and multiple ; Positional data ; Interferometry Keywords: methods: data analysis - techniques: image processing - techniques: interferometric - astrometry - stars: binaries: visual Abstract: From speckle observations made with the PISCO speckle camera at the Pic du Midi Observatory, we present high angular resolution astrometric data for 43 binary stars already observed by the Hipparcos satellite. This sample consists of mainly new Hipparcos eclipsing binaries with a visual companion closer than one arcsecond, chosen with the aim to study the dynamical implications of a third component on the observational parameters of the eclipsing system. In addition, we also included a selection of close visual binaries with few speckle data in order to analyse possible systematic departures between the speckle and the non-speckle orbits. The reduction method and the results are presented in detail. For the close visual binaries we confront our observations with the ephemerides based on the best known orbits. For the wide visual binaries the confrontation is made directly with the Hipparcos data. Our observations are consistent both with previous speckle data and with most of the Hipparcos measurements. Description: This table contains speckle measurements of binary stars (position angle and angular separation) made at the 2-meter telescope of Pic du Midi Observatory with the PISCO speckle camera. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 87 27 Table of speckle measurements of binary stars
See also: I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) I/211 : CCDM (Components of Double and Multiple stars) (Dommanget+ 1994) I/260 : Visual Double Stars in Hipparcos (Dommanget+, 2000) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HIP Hipparcos number 8- 17 A10 --- CCDM CCDM number 19- 38 A20 --- Name Other denomination 39- 40 I2 mm FL Eyepiece Focal length 42- 45 A4 --- Filt Filter 47- 49 A3 --- Type [abehuo, ] Type of object (1) 51- 58 F8.3 yr Epoch Epoch as a fraction of Besselian year 60- 64 F5.1 deg Theta Position angle 66- 68 F3.1 deg e_Theta Error of position angle 70- 75 F6.3 arcsec Rho Angular separation 77- 81 F5.3 arcsec e_Rho Error of angular separation 83- 85 F3.1 arcsec Seeing Full Width at Half Maximum seeing 87 A1 --- Note [n] n: Individual note (2)
Note (1): Type of object: a: astrometric standard b: close companion discovered by Hipparcos e: known eclipsing binary h: eclipsing binary discovered by Hipparcos o: binary with a known orbit u: unsolved Hipparcos variable Note (2): Individual notes: 1447: the (wide) secondary component is HIP 1446. 27309: the (wide) primary component is HIP 29746. 93867: not belonging to the Hipparcos Variability Annex. Noted Elliptical Variable Star in SIMBAD, at the CDS; 103505: variable of RS CVn type; the Hipparcos light curve possibly indicates an Algol type.
Acknowledgements: Jean-Louis Prieur
(End) Patricia Bauer [CDS] 08-Jan-2001
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