PISCO speckle observations in 2004 (Scardia+, 2006)

Astronomy and Astrophysics – Astronomy

Scientific paper

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Stars: Double And Multiple

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" and an accuracy better than ~0.01". 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.
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