Speckle observations with PISCO in Merate – II. Astrometric measurements of visual binaries in 2004

We present relative astrometric measurements of visual binaries taken during the second semester of 2004 with the Pupil Interferometry Speckle camera and Coronagraph (PISCO) at the 1-m Zeiss telescope of the Brera Astronomical Observatory, in Merate, Italy. We performed 207 new observations of 194 o...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2006-04, Vol.367 (3), p.1170-1180
Main Authors: Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R. W., Sala, M., Ghigo, M., Koechlin, L., Aristidi, E.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics
binaries: close
binaries: visual
Cosmology and Extra-Galactic Astrophysics
Double stars
Earth, ocean, space
Exact sciences and technology
Measurement
Physics
Sciences of the Universe
techniques: interferometric
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Summary:We present relative astrometric measurements of visual binaries taken during the second semester of 2004 with the Pupil Interferometry Speckle camera and Coronagraph (PISCO) at the 1-m Zeiss telescope of the Brera Astronomical Observatory, in Merate, Italy. We performed 207 new observations of 194 objects with angular separations in the range 0.1–4.0 arcsec and an accuracy better than ∼0.01 arcsec. Our sample contains orbital couples as well as binaries whose motion is still uncertain. Our purpose is to improve the accuracy of the orbits and constrain the masses of the components. Those measurements show that the orbit of ADS 15115 needs to be revised; we propose a new orbit for this object.
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2006.10035.x