ADC Dataset: J/A+A/367/865 -- Speckle observations of binary systems measured by Hipparcos (2001)

J. L. Prieur, E. Oblak, P. Lampens, M. Kurpinska-Winiarska, E. Aristidi, L. Koechlin, G. Ruymakers

Keywords: Stars, double and multiple ; Positional data ; Interferometry ; methods: data analysis ; techniques: image processing ; techniques: interferometric ; astrometry ; stars: binaries: visual

Source Reference(s):
Astron. Astrophys., Vol. 367, p.865, 2001 (ADS: 2001A&A...367..865P)

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 of Dataset:

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.

See Also:

Table File Information:

J_A+A_367_865_table2.dat - Table of speckle measurements of binary stars

View this Data Download via FTP

Field	Label	Units	Format	Definition
1	HIP	---	I6	Hipparcos number
2	CCDM	---	A10	CCDM number
3	Name	---	A20	Other denomination
4	FL	mm	I2	Eyepiece Focal length
5	Filt	---	A4	Filter
6	Type	---	A3	[abehuo, ] Type of object (1)^(1-1-1)
7	Epoch	yr	F8.3	Epoch as a fraction of Besselian year
8	Theta	deg	F5.1	Position angle
9	e_Theta	deg	F4.1	Error of position angle
10	Rho	arcsec	F6.3	Angular separation
11	e_Rho	arcsec	F6.3	Error of angular separation
12	Seeing	arcsec	F4.1	Full Width at Half Maximum seeing
13	Note	---	A1	[n] n: Individual note (2)^(1-1-2)

^(1-1-1)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

^(1-1-2)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.