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Speckle observations with PISCO in Calern (France): I. Astrometric measurements of visual binaries in 2015–2016
Author(s) -
Scardia Marco,
Rivet JeanPierre,
Prieur JeanLouis,
Pansecchi Luigi,
Argyle Robert W.,
Ling Josefina F.,
Aristidi Eric,
Zanutta Alessio,
Vernet David,
Abe Lyu,
Bendjoya Philippe,
Dimur Cécile,
Suárez Olga
Publication year - 2019
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.201913642
Subject(s) - physics , speckle pattern , speckle imaging , astrometry , telescope , stars , position angle , astrophysics , interferometry , coronagraph , astronomy , optics , exoplanet , galaxy
We present relative astrometric measurements of visual binaries, made in 2015–2016 with the speckle camera pupil interferometry speckle camera and coronagraph (PISCO) at the 1‐m Epsilon telescope of the C2PU facility (Observatoire de la Côte d'Azur, Calern site). Our observing list contains orbital couples as well as binaries whose motion is still uncertain. From our 1,233 observations of 1,173 multiple stars, we obtained 1,170 new measurements with angular separations in the range 0″.1 — 8″.2, and an average accuracy of 0″.0078. The mean error on the position angles is 0°.54. Most of the position angles were determined without the usual 180° ambiguity with the application of the direct vector autocorrelation technique and/or by inspection of the long integration files.