A5089390225- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Astro and Planetary Science
- Geophysics and Gravity Measurements
- Solar and Space Plasma Dynamics
- Scientific Research and Discoveries
- Calibration and Measurement Techniques
- Distributed and Parallel Computing Systems
- Geomagnetism and Paleomagnetism Studies
- Astrophysics and Star Formation Studies
- Spacecraft Design and Technology
- Planetary Science and Exploration
- Advanced optical system design
- Optical Coatings and Gratings
- CCD and CMOS Imaging Sensors
- Pulsars and Gravitational Waves Research
- Galaxies: Formation, Evolution, Phenomena
- Infrared Target Detection Methodologies
- Earth Systems and Cosmic Evolution
- Cosmology and Gravitation Theories
- Optical Systems and Laser Technology
- Astrophysics and Cosmic Phenomena
Osservatorio Astrofisico di Torino
2014-2024
National Institute for Astrophysics
2010-2024
Brera Astronomical Observatory
2004-2022
Thales (France)
2018-2020
Centre National d'Études Spatiales
2018-2020
Eni (Italy)
2019
Max Planck Society
2018
European Business School Paris
2018
Universidad Nacional Autónoma de México
2014
Astronomical Observatory of Rome
2010
Gaia Data Release 2 (Gaia DR2) contains results for 1693 million sources in the magnitude range 3 to 21 based on observations collected by European Space Agency satellite during first 22 months of its operational phase. We describe input data, models, and processing used astrometric content DR2, validation these performed within astrometry task. Some 320 billion centroid positions from pre-processed CCD were estimate five parameters (positions, parallaxes, proper motions) 1332 sources,...
Gaia Early Data Release 3 (Gaia EDR3) contains results for 1.812 billion sources in the magnitude range G = to 21 based on observations collected by European Space Agency satellite during first 34 months of its operational phase. We describe input data, models, and processing used astrometric content EDR3, as well validation these performed within astrometry task. The broadly followed same procedures DR2, but with significant improvements modelling observations. For time data processing,...
Gaia Data Release 1 (Gaia DR1) contains astrometric results for more than billion stars brighter magnitude 20.7 based on observations collected by the satellite during first 14 months of its operational phase. We give a brief overview content data release and model assumptions, processing, validation results. For in common with Hipparcos Tycho-2 catalogues, complete single-star solutions are obtained incorporating positional information from earlier catalogues. other only their positions...
Context. The first data release from the Gaia mission contains accurate positions and magnitudes for more than a billion sources, proper motions parallaxes majority of 2.5 million Hipparcos Tycho-2 stars.
We describe the principle and status of PVLAS experiment which is being assembled at INFN Laboratori Nazionali di Legnaro (Legnaro, Padua, Italy) to look for coherent effects, related QED vacuum structure, on propagation a polarized light beam in strong magnetic field.
<i>Aims. <i/>We present multiwavelength observations of one the most distant gamma-ray bursts detected so far, GRB 080913. Based on these observations, we consider whether it could be classified as a short-duration and discuss implications for progenitor nature energy extraction mechanisms.<i>Methods. <i/>Multiwavelength X-ray, near IR millimetre were made between 20.7 h ~16.8 days after event.<i>Results. <i/>Whereas very faint afterglow was seen at 3.5m CAHA telescope in nIR, X-ray clearly...
Thanks to exceptional coldness, low sky brightness and content of water vapour the above atmosphere Dome C, one three highest peaks large Antarctic plateau, is likely be best site on Earth for thermal infrared observations (2.3-300 μm) as well far range (30 μm-1mm). IRAIT (International Robotic Infrared Telescope) will first European telescope operating at C. It delivered Antarctica end 2006, reach C 2007 winter-over operation start in spring 2008. offer a unique opportunity astronomers test...
We report measurements on a 1.75 m long Fabry–Perot cavity locked to Nd:YAG tunable laser using the Pound–Drever technique. The decay time was measured be about 291 μs corresponding quality factor Q of 5×1011, highest value ever reported for an optical resonant cavity.
A novel apparatus to measure small magnetic birefringences is described. It based on a high-finesse Fabry–Perot cavity, which Nd:YAG laser frequency locked, and 1.1-T permanent dipole magnet. We report the new measurement of anisotropy refraction index (Cotton–Mouton effect) for molecular oxygen at λ=1064 nm,T=20 °C. Our result, Δn(O2)=(-2.29±0.08)10-12(B/1T)2(P/1 atm), consistent with existing theoretical predictions falls in line previous experimental results taken different wavelengths.
The ultimate astronomical observatory would be a formation flying interferometer in space, immune to atmospheric turbulence and absorption, free from telescope thermal emission, reconfigurable adjust baselines according the required angular resolution. Imagine near/mid-infrared sensitivity of JWST far-IR Herschel but with ALMA-level resolution, or imagine having precision control null host star light across 250m detect molecules atmospheres nearby exo-Earths. With no practical engineering...
Abstract Background. Relative astrometry at or below the microarcsec level with a 1 m class space telescope has been repeatedly proposed as tool for exo-planet detection and characterization, well several topics forefront of Astrophysics Fundamental Physics. Aim. This paper investigates potential benefits an instrument concept based on annular field view, compared to traditional focal plane imaging contiguous area close optical axis. Method. Basic aspects relative are reviewed function...
High-precision astrometry well beyond the capacities of Gaia will provide a unique way to achieve astrophysical breakthroughs, in particular on nature dark matter, and complete survey nearby habitable exoplanets. In this contribution, we present scientific cases that require flexibly-pointing instrument capable high astrometric accuracy review best mission profiles can such observations with current space technology as within boundary conditions defined by agencies. We also describe...
The issue of preservation and improvement the Gaia catalogue throughout next few decades is addressed. goal this study to evaluate feasibility astrometric parameter update, for objects already in catalogue, by inclusion new observations from other space missions, particular CSST. proposed approach consists modeling fit sources extragalactic region sample with observations, using stars local field as reference each target. concept verified simulation, framework expectations on performance...
AMICA (Antarctic Multiband Infrared CAmera) is an instrument designed to perform astronomical imaging in the near- (1-5 μm) and mid- (5–27 infrared wavelength regions. Equipped with two detectors, InSb 2562 a Si:As 1282 IBC, cooled at 35 7 K respectively, it will be first investigate potential of Italian-French base Concordia for IR astronomy. The main technical challenge represented by extreme conditions Dome C (T ~ -90 °C, p 640 mbar). An environmental control system ensures correct...
This paper evaluates the performance of algorithms suitable to process measurements from two laser beam metrology systems, in particular with reference Gaia Basic Angle Monitoring device.The system and signal characteristics are reviewed order define key operating features.The low-level defined according different approaches, starting a simple, model free method, progressing strategy based on template variance.The is derived measured data sets.The at micro-arcsec level verified by simulation...
Medium to large angle observations, e.g. for global astrometry, can be implemented in space by means of either a common telescope, fed Beam Combiner (as Hipparcos), or individual telescopes set rigid geometry Gaia). We investigate the applicability auto-collimation and cophasing techniques implementation monitoring system alternative more conventional point-to-point metrology. Apart different constraints, most relevant difference consists approach characteristics simultaneously comparably...