Fernando Pedichini
A5007314498- Adaptive optics and wavefront sensing
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Optical Systems and Laser Technology
- Gamma-ray bursts and supernovae
- Calibration and Measurement Techniques
- Advanced optical system design
- CCD and CMOS Imaging Sensors
- Astrophysics and Cosmic Phenomena
- Astro and Planetary Science
- Solar and Space Plasma Dynamics
- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Infrared Target Detection Methodologies
- History and Developments in Astronomy
- Spectroscopy and Laser Applications
- Particle Accelerators and Free-Electron Lasers
- Atmospheric Ozone and Climate
- Astrophysics and Star Formation Studies
- Advanced Measurement and Metrology Techniques
- Space Satellite Systems and Control
- Advanced X-ray Imaging Techniques
- Historical Geography and Cartography
- Planetary Science and Exploration
National Institute for Astrophysics
2015-2024
Astronomical Observatory of Rome
2014-2024
National Institute of Optics
2018-2023
UK Astronomy Technology Centre
2014-2022
ETH Zurich
2022
Osservatorio Astronomico di Padova
2022
University of Padua
2020
Délégation Paris 7
2014
Université Paris Cité
2014
Galaxies, Etoiles, Physique et Instrumentation
2014
Aims. With an observed and rest-frame duration of < 2s 0.5s, respectively, GRB090426 could be classified as a short GRB. The prompt detection, both from space ground-based telescopes, bright optical counterpart to this GRB offered unique opportunity complete detailed study. Methods. Based on extensive observational campaign, we obtained the spectrum afterglow GRB090426, measuring its redshift obtaining information about medium in which event took place. We completed follow-up observation...
The reionization of the Universe is one most important topics present day astrophysical research. plausible candidates for process are star-forming galaxies, which according to predictions majority theoretical and semi-analytical models should dominate HI ionizing background at z~3. We aim measuring Lyman continuum escape fraction, key parameters compute contribution galaxies UV background. have used ultra-deep U-band imaging (U=30.2mag 1sigma) by LBC/LBT in CANDELS/GOODS-North field, as...
MOONS is a new Multi-Object Optical and Near-infrared Spectrograph selected by ESO as third generation instrument for the Very Large Telescope (VLT). The grasp of large collecting area offered VLT (8.2m diameter), combined with multiplex wavelength coverage (optical to near-IR: 0.8μm - 1.8μm) will provide European astronomical community powerful, unique able pioneer wide range Galactic, Extragalactic Cosmological studies crucial follow-up major facilities such Gaia, VISTA, Euclid LSST. has...
Aims. We present the characteristics and some early scientific results of first instrument at Large Binocular Telescope (LBT), Camera (LBC). Each LBT telescope unit will be equipped with similar prime focus cameras. The blue channel is optimized for imaging in bands red VRIz bands. corrected field-of-view each camera approximately 30 arcmin diameter, chip area equivalent to a 2323 arcmin2 field. In this paper we also commissioning channel.
Abstract We report the results from a pilot study to search for black holes and other dark companions in binary systems using direct imaging with SHARK-VIS iLocater pathfinder “Lili” on Large Binocular Telescope. Starting known single-lined spectroscopic binaries, we select high mass functions that could host whose orbits indicate projected orbital separation ≥30 mas. For this first exploration, selected four (HD 137909, HD 104438, 117044, 176695). In each case, identify luminous companion...
We present high-contrast imaging observations of seven protoplanetary disks at 4 μm using the Enhanced Resolution Imager and Spectrograph (ERIS) on Very Large Telescope. This study focuses detecting scattered light from micron-sized dust particles assessing potential grating vector Apodizing Phase Plat (gvAPP) coronagraph for disk planet characterization. Observations were performed in pupil-stabilized mode with vAPP coronagraph. Data reduced reference differential angular techniques,...
We present optical and near-infrared photometry, along with spectra, of the Type Ia supernova SN 2000E in spiral galaxy NGC 6951. It was discovered by staff Teramo Observatory during monitoring 1999el. The observations span a time interval 234 days 134 (starting 16 7 before maximum B light, respectively). Optical spectra are available from 6 light to 122 after it. exhibits Dm15(B) = 0.94, thus being classifiable as slow-declining showing distinctive features such class objects....
Optical and near-infrared light curves of the Type IIn supernova SN 1999el in NGC 6951 are presented. A period 220 days (416 near-infrared) is covered from first observation obtained a few before maximum light. Spectroscopic observations also discussed. Using as distance calibrator Ia 2000E, which occurred some months later same galaxy, fitting blackbody law to photometric data, we obtain bolometric luminosity for ~1044 ergs s-1. In general, properties very similar those 1998S, bright...
This paper describes the results obtained so far with AquEYE, a single photon counting, fixed aperture photometer for Asiago 182 cm telescope. AquEYE has been conceived as prototype of truly 'quantum' future Extremely Large Telescopes 30–50 m aperture. is characterized by four independent channels equipped avalanche diodes (SPADs) detectors. The counts from are acquired TDC board which nominal 25 ps time tagging capability. Taking into account 35 jitter in SPAD itself, overall precision tags...
Abstract Since volcanic activity was first discovered on Io from Voyager images in 1979, changes Io's surface have been monitored both spacecraft and ground‐based telescopes. Here, we present the highest spatial resolution of ever obtained a telescope. These images, acquired by SHARK‐VIS instrument Large Binocular Telescope, show evidence major resurfacing event trailing hemisphere. When compared to most recent that plume deposit powerful eruption at Pillan Patera has covered part long‐lived...
We present the first deep color-magnitude diagram of Canes Venatici I (CVn I) dwarf galaxy from observations with wide-field Large Binocular Camera on Telescope. Reaching down to main-sequence turnoff oldest stars, it reveals a dichotomy in stellar populations CVn I: harbors an old (≳10 Gyr), metal-poor ([ Fe/H ] ∼ − 2.0), and spatially extended population along much younger (~1.4-2.0 0.5 dex more metal-rich, concentrated population. These young stars are also offset by pc east center. The...
Sodium laser guide stars (LGS) are used, or planned to be as single multiple artificial beacons for Adaptive Optics in many present future large and extremely telescopes projects. In our opinion, several aspects of the LGS have not been studied systematically thoroughly enough past ensure optimal system designs. ESO has designed built, with support from industry, an experimental transportable star unit, composed a compact based on narrow-band Raman Fiber Amplifier patented technology,...
SPHERE (Beuzit et al,. 2019) has now been in operation at the VLT for more than 5 years, demonstrating a high level of performance. produced outstanding results using variety operating modes, primarily field direct imaging exoplanetary systems, focusing on exoplanets as point sources and circumstellar disks extended objects. The achievements obtained thus far with (~200 refereed publications) different areas (exoplanets, disks, solar system, stellar physics...) have motivated large...
Abstract SHARK is a proposal aimed at investigating the technical feasibility and scientific capabilities of high-contrast cameras to be implemented Large Binocular Telescope (LBT). foresees two separated channels: near-infrared (NIR) channel visible, both providing imaging coronagraphic modes. We describe here instrument concept, with particular emphasis on NIR level conceptual study, performed in framework call for proposals new LBT instruments. The search giant extra-Solar planets main...
The demonstration of efficient single-mode fiber (SMF) coupling is a key requirement for the development compact, ultra-precise radial velocity (RV) spectrograph. iLocater next generation instrument Large Binocular Telescope (LBT) that uses adaptive optics (AO) to inject starlight into SMF. In preparation commissioning iLocater, prototype SMF injection system was installed and tested at LBT in Y-band (0.970-1.065 $\mu$m). This designed verify capability AO as well characterize on-sky...
A consortium of several Australian and European institutes – together with the Southern Observatory (ESO) has initiated design MAVIS, a Multi-Conjugate Adaptive Optics (MCAO) system for ground- based 8-m Very Large Telescope (VLT). MAVIS (MCAO-assisted Visible Imager Spectrograph) will deliver visible images integral field spectrograph data 2-3x better angular resolution than Hubble Space Telescope, making it powerful complement at wavelengths to future facilities like space-based James Webb...
Using the 8.4 m Large Binocular Telescope, we observed six GRB afterglows from 2.8 hr to 30.8 days after burst triggers systematically probe late-time behaviors of including jet breaks, flares, and supernova bumps. We detected five with Sloan r' magnitudes ranging 23.0 26.3 mag. The depth our observations allows us extend temporal baseline for measuring breaks by another decade in timescale. two a third candidate, all which are not detectable without deep, optical observations. In other...
Aims. The Large Binocular Cameras (LBC) are two twin wide field cameras (FOV ~ 23'x 25') mounted at the prime foci of 8.4m Telescope (LBT). We performed a weak lensing analysis z=0.288 cluster Abell 611 on g-band data obtained by blue-optimized Camera in order to estimate mass. Methods. Due complexity PSF LBC, we decided use different approaches, KSB and Shapelets, measure shape background galaxies derive shear signal produced cluster. Then estimated mass with both aperture densitometry...
We report on the comparison between observations and simulations of a completed 12-month field observation campaign at Observatorio del Teide, Tenerife, using ESO's transportable 20 watt CW <i>Wendelstein </i>laser guide star system. This mission has provided sodium photon return flux measurements unprecedented detail regarding variation laser power, polarization D<sub>2b</sub> repumping. The Raman fiber projector technology are very similar to that employed in 4LGSF/AOF facility, recently...
Deep multicolour surveys are the main tool to explore formation and evolution of faint galaxies which beyond spectroscopic limit with present technology. The photometric properties these usually compared current renditions semianalytical models provide constraints on fundamental physical processes involved in galaxy evolution, namely mass assembly star formation. Galaxy counts over large sky areas near-UV band important because they difficult obtain given low efficiency instrumentation, even...
Residual speckles in adaptive optics (AO) images represent a well-known limitation on the achievement of contrast needed for faint source detection. Speckles AO imagery can be result either residual atmospheric aberrations, not corrected by AO, or slowly evolving aberrations induced optical system. We take advantage high temporal cadence (1 ms) data acquired System Coronagraphy with High-order Adaptive Optics from R to K bands-VIS forerunner experiment at Large Binocular Telescope...
After completion of its final-design review last year, it is full steam ahead for the construction MOONS instrument - next generation multi-object spectrograph VLT. This remarkable will combine first time: 8 m collecting power VLT, 1000 optical fibres with individual robotic positioners and both medium- high-resolution spectral coverage acreoss wavelength range 0.65μm 1.8 μm. Such a facility allow veritable host Galactic, Extragalactic Cosmological questions to be addressed. In this paper we...
This article presents a proposal aimed at investigating the technical feasibility and scientific capabilities of high contrast cameras to be implemented LBT. Such an instrument will fully exploit unique LBT in Adaptive Optics (AO) as demonstrated by First Light (FLAO) system, which is obtaining excellent results terms performance reliability. The aim this show interest such project, together with conceptual opto-mechanical study shows its feasibility, taking advantage already existing AO...
In February 2014, the SHARK-VIS (System for High contrast And coronography from R to K at VISual bands) Forerunner, a high experimental imager operating visible wavelengths, was installed LBT (Large Binocular Telescope). Here we report on first results obtained by recent on-sky tests. These show extremely good performance of ExAO (Extreme Adaptive Optics) system both in terms spatial resolution and achieved. Similarly what done (Amara et al. 2012), used Forerunner data quantitatively assess...