Enrico Virgilli
A5043485124- Particle Detector Development and Performance
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Advanced X-ray Imaging Techniques
- Advanced Semiconductor Detectors and Materials
- Astrophysics and Cosmic Phenomena
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Pulsars and Gravitational Waves Research
- Dark Matter and Cosmic Phenomena
- Ocular Surface and Contact Lens
- Lightning and Electromagnetic Phenomena
- Crystallography and Radiation Phenomena
- Astronomy and Astrophysical Research
- Calibration and Measurement Techniques
- Ionosphere and magnetosphere dynamics
- CCD and CMOS Imaging Sensors
- Medical Imaging Techniques and Applications
- Advanced Electron Microscopy Techniques and Applications
- Atmospheric aerosols and clouds
- X-ray Spectroscopy and Fluorescence Analysis
- Optical Systems and Laser Technology
- Fire effects on ecosystems
- Particle Accelerators and Free-Electron Lasers
- X-ray Diffraction in Crystallography
National Institute for Astrophysics
2011-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2020-2024
Osservatorio di Astrofisica e Scienza dello Spazio
2020-2024
Institute for Space Astrophysics and Planetology
2023
University of Ferrara
2013-2022
Union des Industries Ferroviaires Européennes
2017
Université Côte d'Azur
2015
Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
2013
Abstract The Gamma-Flash program, funded by the Italian Space Agency (ASI) and led National Institute for Astrophysics (INAF), aims to study high-energy emissions related thunderstorms, such as terrestrial gamma-ray flashes (TGFs) glows. program development of two main detection systems: a ground-based system, installed at “O. Vittori” Observatory on top Mt. Cimone (Northern-Central Italy), an airborne payload, Cessna Citation Mustang aircraft, in-flight campaigns. system consists five γ...
No robust detection of prompt electromagnetic counterparts to fast radio bursts (FRBs) has yet been obtained, in spite several multi-wavelength searches carried out so far. Specifically, X/gamma-ray are predicted by some models. We planned on searching for gamma-ray the Insight-Hard X-ray Modulation Telescope (Insight-HXMT) data, taking advantage unique combination large effective area keV-MeV energy range and sub-ms time resolution. selected 39 FRBs that were promptly visible from...
Abstract Nuclear astrophysics, and particularly nuclear emission line diagnostics from a variety of cosmic sites, has remained one the least developed fields in experimental astronomy, despite its central role addressing number outstanding questions modern astrophysics. Radioactive isotopes are co-produced with stable fusion reactions nucleosynthesis supernova explosions other violent events, such as neutron star mergers. The origin 511 keV positron annihilation observed direction Galactic...
HERMES (High Energy Rapid Modular Ensemble of Satellites) Technological and Scientific pathfinder is a space borne mission based on LEO constellation nano-satellites. The 3U CubeSat buses host new miniaturized detectors to probe the temporal emission bright high-energy transients such as Gamma-Ray Bursts (GRBs). Fast transient localization, in field view several steradians with arcmin-level accuracy, gained by comparing time delays among same event detection epochs occurred at least 3 With...
HERMES-TP/SP (High Energy Rapid Modular Ensemble of Satellites Technologic and Scientific Pathfinder) is a constellation six 3U nano-satellites hosting simple but innovative X-ray detectors, characterized by large energy band excellent temporal resolution, thus optimized for the monitoring Cosmic High transients such as Gamma Ray Bursts electromagnetic counterparts Gravitational Wave Events, determination their positions. The projects are funded Italian Ministry University Research Space...
We will describe the LAUE project, supported by Italian Space Agency, whose aim is to demonstrate capability build a focusing optics in hard X-/soft gamma-ray domain (80{600 keV). To show lens feasibility, assembling of Laue petal prototype with 20 m focal length ongoing. Indeed, feasibility study, within has demonstrated that made petals feasible. Our goal 80-600 keV energy band. In addition detailed description new LARIX facility, which being assembled, we report results project obtained so far.
THESEUS (Transient High Energy Sky and Early Universe Surveyor) is one of the three missions selected by ESA as fifth medium class mission (M5) candidates in its Cosmic Vision science program, currently under assessment a phase A study with planned launch date 2032. designed to carry on-board two wide deep sky monitoring instruments for X/gamma-ray transients detection: wide-field soft X-ray monitor imaging capability (Soft Imager, SXI, 0.3 – 5 keV), hard X-ray, partially-imaging...
Context. Fast Radio Bursts (FRBs) are millisecond-long bursts uniquely detected at radio frequencies. FRB 131104 is the only case for which a $\gamma$-ray transient positionally and temporally consistent was claimed. This high-energy had duration of $\sim400$~s 15-150~keV fluence $S_{\gamma}\sim4\times10^{-6}$ erg $\mathrm{cm}^{-2}$. However, association with still debated. Aims. We aim testing systematic presence an associated counterpart throughout sample population. Methods. used approach...
In the context of Laue project devoted to build a lens prototype for focusing celestial hard x-/soft gamma-rays, made bent crystal tiles, with 20-m focal length, is simulated. The energy passband assumed be 90 600 keV. distortion image produced by on plane, due effects tile misalignment and radial curvature, investigated. corresponding effective area lens, its point spread function, sensitivity are calculated compared those exhibited nominal no and/or distortion. Such analysis crucial...
No transient electromagnetic emission has yet been found in association to fast radio bursts (FRBs), the only possible exception (3sigma confidence) being putative gamma-ray signal detected Swift/BAT data energy band 15-150 keV at time and position of FRB131104. Systematic searches for hard X/gamma-ray counterparts other FRBs ended up with just lower limits on radio/gamma-ray fluence ratios. In 2001, earliest discovered FRBs, BeppoSAX Gamma-Ray Burst Monitor (GRBM) was one most sensitive...
A tidal disruption event (TDE) is an astronomical phenomenon in which a previously dormant black hole (BH) destroys star passing too close to its central part. We analyzed the flaring episode detected from TDE sources, Swift~J1644+57 and Swift J2058+05 using RXTE, Suzaku data. The spectra are well fitted by so called Bulk Motion Comptonization model for best-fit photon index Gamma varies 1.1 1.8. have firmly established saturation of versus mass accretion rate at Gamma_{sat} about 1.7 --...
A link between magnetars and fast radio burst (FRB) sources has finally been established. In this context, one of the open issues is whether/which extra galactic FRBs exhibit X/gamma-ray outbursts whether it correlated with activity. We aim to constrain possible activity from nearest extragalactic FRB currently known over a broad energy range, by looking for bursts range timescales energies that are compatible being powerful flares magnetars. followed up as-yet source at mere 149 Mpc...
Abstract The coming decades will establish the exploration of gravitational wave (GW) Universe over a broad frequency range by ground and space interferometers. Meanwhile, wide-field, high-cadence sensitive surveys span electromagnetic spectrum from radio all way up to TeV, as well high-energy neutrino window. Among numerous classes transients, γ –ray bursts (GRBs) have direct links with most hot topics that be addressed, such strong gravity regime, relativistic shocks, particle acceleration...
The low-energy gamma-ray domain is an important window for the study of high-energy Universe. Here matter can be observed in extreme physical conditions and during powerful explosive events. However, observing gamma rays from faint sources extremely challenging with current instrumentation. With techniques used at present, collecting more signal requires larger detectors, leading to increase instrumental background. For leap sensitivity that required future missions, use must made flux...
We report on recent progress in the development of Laue lenses for applications hard X/soft gamma-ray astronomy. Here we focus realization a sector such lens made 11 bent Germanium crystals and describe technological challenges involved their positioning alignment with adhesive-based bonding techniques. The accurate uniformity curvature are critical achieving optimal X-ray focusing capabilities. have assessed how errors misalignment respect to main orientation angles affect point spread...
We present the LAUE project devoted to develop an advanced technology for building a high focal length Laue lens soft gamma-ray astronomy (80-600 keV). The final goal is focusing optics that can improve current sensitivity in above energy band by 2 orders of magnitude.
We present the status of LAUE, a project supported by Italian Space Agency (ASI), and devoted to develop Laue lenses with long focal length (up 100 meters), for hard X--/soft gamma--ray astronomy (80-600 keV). Thanks their focusing capability, design goal is improve sensitivity current instrumention in above energy band 2 orders magnitude, down few times $10^{-8}$ photons/(cm$^2$ s
This paper summarizes the development of a successful project, LAUE, supported by Italian Space Agency (ASI) and devoted to long focal length (up 100 m) Laue lenses for hard X--/soft gamma--ray astronomy (80-600 keV). The apparatus is ready assembling prototype lens petal ongoing. great achievement this project use bent crystals. From measurements obtained on single crystals from simulations, we have estimated expected Point Spread Function thus sensitivity made petals. few $\times10^{-8}$...
The ORION chipset, a full-custom multichip readout and processing electronics for the X- <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\gamma $ </tex-math></inline-formula> -ray imaging spectrometer (XGIS) on-board transient high-energy sky early universe surveyor (THESEUS) space mission, is presented. XGIS detection plane arranged in matrix of 10 notation="LaTeX">$\times modules, each one composed 64...
We present the results obtained with new Laue lens prototype built in LARIX facility Physics Department of University Ferrara. Following first presented at SPIE conference Marseille, and also thanks to methods adopted for improving (SPIE San Diego, Ferrari et al. 2009) here we improved performances terms point spread function (PSF) spectral response.