Details

Autor(en) / Beteiligte

• Scardia, M.
• Prieur, J.-L.
• Pansecchi, L.
• Argyle, R. W.
• Sala, M.
• Ghigo, M.
• Koechlin, L.
• Aristidi, E.

Titel

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

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2006-04, Vol.367 (3), p.1170-1180

Ort / Verlag

23 Ainslie Place , Edinburgh EH3 6AJ , UK . Telephone 226 7232 Fax 226 3803: Blackwell Science Ltd

Erscheinungsjahr

2006

Quelle

Wiley Online Library

Beschreibungen/Notizen

• 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.