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

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

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006mnras.367.1170s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 367, Issue 3, pp. 1170-1180.

Astronomy and Astrophysics

Astronomy

11

Techniques: Interferometric, Binaries: Close, Binaries: Visual

Scientific paper

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.

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