A5065750958- Adaptive optics and wavefront sensing
- Advanced X-ray Imaging Techniques
- Astrophysical Phenomena and Observations
- Optical Systems and Laser Technology
- Advanced Surface Polishing Techniques
- Particle Detector Development and Performance
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Measurement and Metrology Techniques
- Astronomical Observations and Instrumentation
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Advanced optical system design
- Astrophysics and Cosmic Phenomena
- Surface Roughness and Optical Measurements
- Laser Material Processing Techniques
- Particle Accelerators and Free-Electron Lasers
- Calibration and Measurement Techniques
- Astro and Planetary Science
- Advanced X-ray and CT Imaging
- Optical measurement and interference techniques
- Diamond and Carbon-based Materials Research
- Gamma-ray bursts and supernovae
- High-pressure geophysics and materials
- Ion-surface interactions and analysis
- CCD and CMOS Imaging Sensors
Brera Astronomical Observatory
2014-2024
National Institute for Astrophysics
2003-2023
Campbell Collaboration
2013
Institute for Space Astrophysics and Planetology
2013
Arcetri Astrophysical Observatory
2013
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
In this paper, the development of dual mirror Small Size Telescopes (SST) for Cherenkov Telescope Array (CTA) is reviewed. Up to 70 SST, with a primary diameter 4 m, will be produced and installed at CTA southern site. These allow investigation gamma-ray sky highest energies accessible CTA, in range from about 1 TeV 300 TeV. The telescope presented contribution characterized by two major innovations: use Schwarzschild-Couder configuration an innovative camera using as sensors either...
MAORY is one of the four instruments for E-ELT approved construction. It an adaptive optics module offering two compensation modes: multi-conjugate and single-conjugate optics. The project has recently entered its phase B. A system-level overview current status given in this paper.
Silicon Pore Optics, after 10 years of development, forms now the basis for future large (L) class astrophysics Xray observatories, such as ATHENA mission to study hot and energetic universe, matching L2 science theme recently selected by ESA launch in 2028. The scientific requirements result an optical design that demands high angular resolution (5") effective area (2 m<sup>2</sup> at a few keV) X-ray lens with focal length 12 to14 m. Optics was initially based on long (25 50 m) telescope...
At INAF-Astronomical Observatory of Brera a study is under way to explore the problems related ion beam figuring full scale Zerodur hexagonal mirrors M1 for European Extremely Large Telescope (E-ELT), having size 1.4 m corner corner. During this it initially foreseen scaled down version mirror same material 1 assess relevant and issues. This specific has radius curvature 3 m, which allows easy interferometric measurement. A mechanical support was designed minimize its deformations due...
PLATO stands for PLAnetary Transits and Oscillation of stars is a Medium sized mission selected as M3 by the European Space Agency part Cosmic Vision program. The strategy behind to scrutinize large fraction sky collecting lightcurves number detecting transits exo-planets whose apparent orbit allow transit be visible from Earth. Furthermore, basically able provide ratio size transiting planet host star, latter being characterized asteroseismology, allowing accurate masses, radii hence...
The Beam Expander Testing X-ray facility (BEaTriX) is a unique apparatus now operated at the Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico Brera (OAB), in Merate, Italy. It has been specifically designed to measure point spread function (PSF) and effective area (EA) of mirror modules (MMs) Advanced Telescope for High-ENergy Astrophysics (ATHENA), based on silicon pore optics (SPO) technology, verification before integration into assembly. To this end, BEaTriX generates...
The joint European x-ray telescope (JET-X) is one of the core scientific instruments RUssian SPECTRUM X-(gamma) astrophysics mission. JET-X designed to study emission from sources in band 0.3-10 keV; particular meet primary goals cosmology and extragalactic astronomy. consists two identical, coaligned telescopes, each with a spatial resolution better than 30 arcsec half energy width. Focal plane imaging provided by cooled sensitive CCD detectors which combine high good spectral resolution,...
The Ion Beam Figuring is a well known technique able to correct shape errors on optical surfaces with high accuracy. size of the ion beam dictates strongly higher spatial frequencies that can be corrected surface. correction small optics some cm in diameter or containing very time consuming impossible. A system permits components has been developed Astronomical Observatory Brera (INAF-OAB). It and large removal rate. employs concentrator force broader emitted from an source into smaller spot...
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...
Future lightweight and long-focal-length x-ray telescopes must guarantee a good angular resolution (e.g., 5 arc sec HEW) reach an unprecedented large effective area. This goal can be reached with the slumping of borosilicate glass sheets that allow fabrication low-cost optical units (XOU). These XOUs, based on mirror segments, have to assembled together form complete multishell Wolter-I optics. The technology for integration these XOUs is under development in Europe, funded by European Space...
Thin glass foils are considered good candidates to build a segmented X-ray telescope with effective area as large 2 m<sup>2</sup> and angular resolution better than 5 arcsec. In order produce thin mirror segments, we developed direct hot slumping technique assisted by pressure, in which the shape of mould is replicated onto optical surface glass. this paper present result obtained AF32 (by Schott) EAGLE XG Corning) types. The selected material Zerodur K20, it does not require any...
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...
Lynx is the future x-ray observatory with superb imaging capabilities (<1 arc sec half-energy width) and large throughput (2 m2 effective area @ 1 keV), which being considered in U.S. to take over Chandra. The implementation of mirror module represents a very challenging aspect, different approaches are considered. Thin low-weight substrates, working grazing incidence configuration, necessary meet severe mass constraints, but they have also preserve requirement an excellent angular...
The pyramid wavefront sensor is a novel concept device whose features are attractive for adaptive optics several reasons. We show here the first loop closure of an AO system using this kind at focal plane 4m-class telescope. One critical optical elements our that splits light from star used correction. This component essentially four faces prism having actually full vertex angle 7 degrees with specifications on its edges and roof 4 - 5 microns or better. best turned obtained prototypes...
We report on the production and implementation of 100 square panels 1 m x m, based innovative approach cold slumping thin glass sheets. The more than segments will cover around one half 240 m-square reflecting surface MAGIC II, a clone atmospheric Cherenkov telescope I (with single-dish 17 diameter mirror) which is already operating since late 2003 at La Palma. II be completed by end 2008 operate in stereoscopic mode with I. While central part reflector composed diamond milled Aluminum...
X-ray telescopes with very large collecting area, like the proposed International Observatory (IXO, around 3 <sup>m2 </sup>at 1 keV), need to be composed of a number high quality mirror segments, aiming at achieving an angular resolution better than 5 arcsec HEW (Half-Energy-Width). A possible technology manufacture modular elements that will compose entire optical module, named Optical Units (XOUs), consists stacking in Wolter-I configuration several layers thin foils borosilicate glass,...
Future high energy astrophysics missions will require performance novel X-ray optics to explore the Universe beyond limits of currently operating Chandra and Newton observatories. Innovative technologies are therefore being developed matured by European Space Agency (ESA) in collaboration with research institutions industry, enabling leading-edge future science missions. Silicon Pore Optics (SPO) [1 21] Slumped Glass (SGO) [22 29] lightweight Europe, driven applications observatory class...
The Adaptive Optics for the Telescopio Nazionale Galileo module (namely AdOpt@TNG) implements pyramid wavefront sensor as a unique feature. This allows to get valuable information on its performance sky. An updated overview of results obtained so far is shown, including discussion sources errors in closed loop operation, distinguishing them between ones specific and one more related system whole. also number experiments check sensitivity such sensor, especially comparison with other types...
The project PLAnetary Transits and Oscillations of stars (PLATO) is one the three medium class (M class) missions selected in 2010 for definition study framework ESA Cosmic Vision 2015-2025 program. main scientific goals PLATO are i) discovery extra-solar planetary systems, (including those hosting Earth-like planets their habitable zone) by means transits detection from space radial velocity follow-up ground, ii) characterization through seismic analysis, order to determine with high...
Silicon Pore Optics is an enabling technology for future L- and M-class astrophysics X-ray missions, which require high angular resolution (~5 arc seconds) large effective area (1 to 2 m2 at a few keV). The exploits the high-quality of super-polished 300 mm silicon wafers associated industrial mass production processes, are readily available in semiconductor industry. plan-parallel have surface roughness better than 0.1 nm rms diced, structured, wedged, coated, bent stacked form modular...
Future X-ray telescopes with very large collecting area, like the proposed Athena more than 2 m2 effective area at 1 keV, need to be realized as assemblies of a number optical units, named Optical Units (XOUs). The Brera Astronomical Observatory (INAF-OAB) is developing new technology manufacture these modular elements, compatible an angular resolution 5 arcsec HEW (Half-Energy-Width). This technique consists in stacking Wolter-I configuration several layers thin foils glass, previously...
The Constellation-X (Con-X) mission planned for launch in 2015, will feature an array of Hard X-ray telescopes (HXT) with a total collecting area greater than 1500 cm<sup>2</sup> at 40 keV. Two technologies are being investigated the optics these telescopes, including multilayer coated Electroformed-Nickel-Replicated (ENR) shells. attraction ENR process is that resulting full-shell inherently stable and offer prospect better angular resolution which results lower background higher instrument...