Published 2020
| Version v1
Journal article
Measurements of visual binaries with EMCCD cameras and the Nice 76-cm refractor in 2009-2010
Contributors
Others:
- Galilée (Galilée) ; Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)
- Institut de recherche en astrophysique et planétologie (IRAP) ; Université Toulouse III - Paul Sabatier (UT3) ; Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) ; Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) ; Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)
- Joseph Louis LAGRANGE (LAGRANGE) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)
- INAF - Osservatorio Astronomico di Brera (OAB) ; Istituto Nazionale di Astrofisica (INAF)
- Institute of Astronomy [Cambridge] ; University of Cambridge [UK] (CAM)
- Observatorio astronomico Ramón María Aller
Description
We present relative astrometric and photometric measurements of visual binaries made in 2009-2010, with the 76-cm refractor of Côte d'Azur Observatory and a pair ofsensitive EMCCD ANDOR cameras. Ourobserving list consists of optical pairs and binaries whoseorbital motion is still uncertain. Three differenttechniques were used for obtaining measurements: Lucky Imaging, Speckle Interferometry and the Direct Vector Autocorrelation method. From the 2050 observationsof double stars that we performed, we obtained1652 new measurements of the relative position of 1792 objects, with angular separations in the range 0′′.1— 14′′.1. The average accuracy is estimated at 0′′.02 for the angular separations and 0◦.6 for the positionangles. We managed to observe faint systems (mV≈12) with large magnitude difference (up to ∆mV≈5).We have thus been able to measure many systems containing reddwarf stars that had been poorly monitoredsince their discovery. We also measured the difference of magnitude of the two components of 1143 objectswith an estimated error of 0.2 mag.
Abstract
International audienceAdditional details
Identifiers
- URL
- https://hal.archives-ouvertes.fr/hal-02899911
- URN
- urn:oai:HAL:hal-02899911v1