A5072994007- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- History and Developments in Astronomy
- Astrophysics and Star Formation Studies
- Calibration and Measurement Techniques
- Galaxies: Formation, Evolution, Phenomena
- CCD and CMOS Imaging Sensors
- Remote Sensing and LiDAR Applications
- GNSS positioning and interference
- Atmospheric aerosols and clouds
- Meteorological Phenomena and Simulations
- Scientific Research and Discoveries
- Advanced optical system design
- Advanced Measurement and Metrology Techniques
- Planetary Science and Exploration
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Satellite Image Processing and Photogrammetry
- Methane Hydrates and Related Phenomena
- Advanced X-ray Imaging Techniques
- Geophysics and Gravity Measurements
- Geology and Paleoclimatology Research
Centre National de la Recherche Scientifique
2014-2024
Institut de Recherche en Astrophysique et Planétologie
2014-2024
Université de Toulouse
2013-2024
Université Toulouse III - Paul Sabatier
2014-2024
Observatoire Midi-Pyrénées
2010-2020
Brera Astronomical Observatory
2011-2017
Université de Rennes
2012
University of Cambridge
2011
Laboratoire d'Astrophysique de Bordeaux
1995
European Southern Observatory
1990
We present relative astrometric measurements of visual binaries, made in 2015, with the speckle camera PISCO 102‐cm Zeiss telescope Brera Astronomical Observatory, Merate, Italy. Our observing list contains orbital couples as well binaries whose motion is still uncertain. obtained 196 new 173 binary stars, angular separations range 0″.27–11″.3, and an average accuracy 0″.019. The mean error on position angles 0 ° .6. Most were determined without usual 180 ambiguity application...
come from teaching and research institutions in France or abroad, public private centers.L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques niveau recherche, publiés ou non, émanant des établissements d'enseignement recherche français étrangers, laboratoires publics privés. Speckle observations with PISCO Merate -II. Astrometric measurements of visual binaries 2004
We present relative astrometric measurements of visual binaries made in 2010 with the Pupil Interferometry Speckle camera and COronagraph (PISCO) on 102 cm Zeiss telescope Brera Astronomical Observatory, Merate. Our observing list contains orbital couples as well whose motion is still uncertain. obtained new 207 191 objects, angular separations range 0.2–4.7 arcsec an average accuracy 0.01 arcsec. The mean error position angles 0°.6. Most were determined without usual 180° ambiguity...
Abstract We present relative astrometric and photometric measurements of visual binaries made in 2008, with the 76‐cm refractor Côte d'Azur Observatory. Our observing list contains orbital couples as well whose motion is still uncertain. Three different techniques were used for obtaining measurements: Lucky imaging, speckle interferometry Direct Vector Autocorrelation method. obtained 2420 new position 2225 objects, angular separations range 0″.07‐11″.5, an average accuracy 0″.02. The mean...
We present speckle interferometry observations of 47 composite spectrum stars obtained between 1993 and 1998 at the Pic du Midi Observatory with PISCO camera. 76% over 150 independent 10 minute sequences led to a companion detection. Binary component angular separations ranged from 005 12. also series 23 measurements an additional nine close binaries. confirm, for first time since their discovery, duplicity HD 29104 (L4), 83808 (WGT 1Aa), 183912 Aa' (BON Ap), 156729 (HR 6436). Discovered as...
Abstract This paper is the last of a series devoted to study Am stars, with monitoring radial velocities sample 91 objects during more than 20 yr. The purpose was determine which stars were members spectroscopic binaries (SBs) and in detail those systems order obtain observational constraints on origin phenomenon. In first part, we present results detailed eight (HD 32893, 60489, 109762, 111057, 113697, 204918, 219675 BD+44° 4512) observed at Haute-Provence Cambridge observatories CORAVEL...
view Abstract Citations (73) References (31) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Surface Photometry of Shell Galaxies Fort, B. P. ; Prieur, J. -L. Carter, D. Meatheringham, S. Vigroux, L. CCD surface photometry in four passbands shells around three bright elliptical galaxies, NGC 2865, 3923, and 5018, is presented. Colors, profiles across the shells, precise geometry are determined. The observations all favor a merger process as origin colors...
Nuclear spectra have been obtained for 100 of the 137 galaxies in Malin & Carter catalogue. The objects were selected purely on grounds position sky. Redshifts are presented all, and velocity dispersions most these systems. Many atypical elliptical or lenticular galaxies. A-type stars, suggestive recent star formation galactic nucleus, probably required 15 to 20 per cent, 25 cent emission lines. About 10 colours, absolute magnitudes similar post-starburst high redshift clusters. Assuming...
We present the results of monitoring speed optical turbulent layers in atmosphere above San Pedro Mártir, Mexico, during 15 nights 2000 May. The data were obtained using generalized scintillation detection and ranging technique (generalized SCIDAR), developed at Nice University. This paper constitutes second a series. first presents concerning measurements turbulence strength same site time. principal article are as follows: (1) wind profiles remain stable each night. (2) No correlation...
Abstract We present relative astrometric measurements of visual binaries made during the second semester 2005, with speckle camera PISCO at 102 cm Zeiss telescope Brera Astronomical Observatory, in Merate. Our sample contains orbital couples as well whose motion is still uncertain. The purpose this long term program to improve accuracy orbits and determine masses components. performed 130 new observations 120 objects, most angular separations range 0″.1–4″, an average 0″.01. Most position...
Abstract We present relative astrometric measurements of visual binaries, made in 2009 with the speckle camera PISCO at 102 cm Zeiss telescope Brera Astronomical Observatory, Merate. Our observing list contains orbital couples as well binaries whose motion is still uncertain. obtained 345 new 259 objects, angular separations range 0.″18–4.″6, and an average accuracy 0.″011. The mean error on position angles 0.°6. Most were determined without usual 180° ambiguity application...
We present relative astrometric measurements of visual binaries made with the Pupil Interferometry Speckle camera and Coronagraph (PISCO) at 1-m Zeiss telescope Brera Astronomical Observatory, in Merate. provide 135 new observations 103 objects, angular separations range 0.1–4.0 arcsec an accuracy better than ∼0.01 arcsec. Our sample is orbital couples as well whose motion still uncertain. purpose to improve orbits constrain masses components.
We present relative astrometric measurements of visual binaries made during the first semester 2005, with Pupil Interferometry Speckle Camera and Coronagraph (PISCO) at 102-cm Zeiss telescope Brera Astronomical Observatory, in Merate. performed 214 new observations 192 objects, angular separations range 0.2–4.3 arcsec, an average accuracy 0.01 arcsec. Most position angles could be determined without usual 180° ambiguity, their mean error is . Our sample contains orbital couples as well...
Abstract We present a new orbit for the visual binary ADS 8630 = γ Vir. Although it is one of first double stars discovered, its orbital elements were still poorly known. Indeed very high eccentricity and difficulty observing pair at periastron passage in 1836 has meant that only now sufficient measures recent close approach 2005 have allowed an analysis which predicts angular motion to acceptable degree accuracy. series 35 speckle measurements obtained with PISCO Merate between 2004 2006....
Abstract We present relative astrometric measurements of visual binaries made during the second semester 2007, with speckle camera PISCO at 102 cm Zeiss telescope Brera Astronomical Observatory, in Merate. Our sample contains orbital couples as well whose motion is still uncertain. obtained 283 new 279 objects, angular separations range 0″.17–4″.4, and an average accuracy 0″.014. The mean error on position angles 0°.6. Most were determined without usual 180° ambiguity application...
Context. Asteroid (22) Kalliope is the second largest M-type asteroid in main belt and orbited by a satellite, Linus. Whereas mass of already well constrained thanks to presence moon, its volume still poorly known, leading uncertainties on bulk density internal structure. Aims. We aim refine shape thus diameter density, as orbit moon better constrain mass, hence Methods. acquired disk-resolved observations using VLT/SPHERE/ZIMPOL instrument reconstruct three-dimensional (3D) three different...
This paper presents speckle observations of Mira (o Cet) and late-type stars with the PISCO camera Pic du Midi during period 1995-1998. A survey for binarity among a sample was performed, which led to seven positive detections out 36 objects. Photometric color variations companion were searched for, but no significant brightness could be found over timescale ∼5-10 minutes. The position photometry measurements, restored images high angular resolution binary system A-B (ADS 1778) are in full...
Abstract Preliminary new orbital elements were computed for the visual binary stars A 1 ‐ ADS 1345, 2629 3610, BU 560 4371, STF 3115 4376, 1426 AB 7730 and 2437 11956. Using Straizys Kuriliene's data, we derived formulae computing dynamical parallaxes luminosity classes IV V. The values found those systems are in agreement with Hipparcos corresponding systemic masses consistent spectral types. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Abstract We present relative astrometric measurements of visual binaries, made in 2012 with the speckle camera PISCO at 102‐cm Zeiss telescope Brera Astronomical Observatory, Merate. Our observing list contains orbital couples as well binaries whose motion is still uncertain. obtained 355 new 344 binary stars, angular separations range 0′.14–6′.9, and an average accuracy 0.′02. The mean error on position angles 0°.5. Most were determined without usual 180° ambiguity application...
We present an iterative, potentially automated method for deriving wind profiles from generalized scintillation detection and ranging (SCIDAR) measurements, which can work in a nonsupervised mode. It is extension of our CLEAN‐based previously developed C2N profile determination. The algorithm based on morphological analysis the cross‐correlation function consecutive irradiance frames, with introduction some knowledge profiles, are determined autocorrelation those frames. This was...