Speckle observations with PISCO in Merate – II. Astrometric measurements of visual binaries in 2004 |
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| Authors: | M Scardia J-L Prieur L Pansecchi R W Argyle M Sala M Ghigo L Koechlin E Aristidi |
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| Institution: | I.N.A.F. –Osservatorio Astronomico di Brera, Via E. Bianchi 46, 23807 Merate, Italy;UMR 5572 d'Astrophysique, Observatoire Midi-Pyrénées –CNRS, 14 Avenue Edouard Belin, 31400 Toulouse, France;Institute of Astronomy, Madingley Road, Cambridge CB3 0HA;UMR 6525 d'Astrophysique, Universitéde Nice Sophia -Antipolis –CNRS, Parc Valrose, 06108 Nice Cedex 2, France |
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| Abstract: | 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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| Keywords: | techniques: interferometric binaries: close binaries: visual |
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