S. Ronchini
A5106651034- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Computational Physics and Python Applications
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- High-pressure geophysics and materials
- Radio Astronomy Observations and Technology
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Magnetic confinement fusion research
- Reservoir Engineering and Simulation Methods
- Advanced X-ray and CT Imaging
- Superconducting Materials and Applications
- Geophysics and Sensor Technology
- Advanced Frequency and Time Standards
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear Physics and Applications
- Particle Detector Development and Performance
- Statistical and numerical algorithms
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Mobile and Web Applications
Gran Sasso Science Institute
2019-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2020-2024
Pennsylvania State University
2024
National Institute for Astrophysics
2022
Fondazione Bruno Kessler
2022
Collurania Teramo Observatory
2020-2021
University of Strathclyde
2021
University of Rome Tor Vergata
2019
Abstract The Einstein Telescope (ET), the European project for a third-generation gravitational-wave detector, has reference configuration based on triangular shape consisting of three nested detectors with 10 km arms, where each detector 'xylophone' made an interferometer tuned toward high frequencies, and low frequencies working at cryogenic temperature. Here, we examine scientific perspectives under possible variations this design. We perform detailed evaluation science case single...
Abstract Monitoring of vibrational eigenmodes an elastic body excited by gravitational waves was one the first concepts proposed for detection waves. At laboratory scale, these experiments became known as resonant bar detectors developed Joseph Weber in 1960s. Due to dimensions bars, targeted signal frequencies were kHz range. also pointed out that monitoring vibrations Earth or Moon could reveal mHz band. His Lunar Surface Gravimeter experiment deployed on Apollo 17 crew had a technical...
The Einstein Telescope (ET) is going to bring a revolution for the future of multi-messenger astrophysics. In order detect counterparts binary neutron star (BNS) mergers at high redshift, high-energy observations will play crucial role. Here, we explore perspectives ET, as single observatory and in network gravitational-wave (GW) detectors, operating synergy with $\gamma$-ray X-ray satellites. We predict emission BNS its detectability theoretical framework which able reproduce properties...
The current generation of very-high-energy gamma-ray (VHE; E > 30 GeV) detectors (MAGIC and H.E.S.S.) have recently demonstrated the ability to detect afterglow emission bursts (GRBs). However, GRB prompt emission, typically observed in 10 keV–10 MeV band, is still undetected at higher energies. Here, we investigate perspectives multi-messenger observations earliest VHE from short GRBs. Considering binary neutron star mergers as progenitors GRBs, evaluate joint detection efficiency...
Abstract GW230529 is the first compact binary coalescence detected by LIGO–Virgo–KAGRA collaboration with at least one component mass confidently in lower gap, corresponding to range 3–5 M ⊙ . If interpreted as a neutron star–black hole merger, this event has most symmetric ratio so far and therefore relatively high probability of producing electromagnetic (EM) emission. However, no EM counterpart been reported. At merger time t 0 , Swift-BAT Fermi-GBM together covered 100% sky. Performing...
Next-generation gravitational wave (GW) observatories, such as the Einstein Telescope (ET) and Cosmic Explorer, will observe binary neutron star (BNS) mergers across cosmic history, providing precise parameter estimates for closest ones. Innovative wide-field like Vera Rubin Observatory, quickly cover large portions of sky with unprecedented sensitivity to detect faint transients. This study aims assess prospects detecting optical emissions from BNS next-generation detectors, considering how...
The Swift Burst Alert Telescope (BAT) is a coded aperture gamma-ray instrument with large field of view that was designed to detect and localize transient events. When detected, either on-board or externally, the BAT saves time-tagged event (TTE) data which provides highest quality information locations photons on detector plane their energies. This can be used produce spectra, lightcurves, sky images event. While these products are produced by Data Center current software, they often preset...
Abstract We present results from a search for X-ray/gamma-ray counterparts of gravitational-wave (GW) candidates the third observing run (O3) LIGO–Virgo–KAGRA network using Swift Burst Alert Telescope (Swift-BAT). The includes 636 GW received with low latency, 86 which have been confirmed by offline analysis and included in cumulative Gravitational-Wave Transient Catalogs (GWTC-3). Targeted searches were carried out on entire sample maximum-likelihood Non-imaging Reconstruction Temporal...
Among several breakthrough discoveries in multi-messenger astrophysics achieved the last decade, there is first short gamma-ray burst (GRB) associated to gravitational wave (GW) source GW170817, which confirmed binary neutron star (NS-NS) mergers as GRB progenitors. More identifications are expected over next years, but it will only be during second half of 2030s that statistically large samples NS-NS mergers, well other GW sources star-black hole and core collapse supernovae, become...
Neutrino emission from γ -ray bursts (GRBs) has been sought for a long time, and stringent limits on the most accredited GRB models have obtained IceCube. Multiwavelength observations of last decades improved our knowledge parameters, such as Lorentz factor luminosity, which can vary one to another by several orders magnitude. Empirical correlations among parameters identified during prompt phase, with direct implications models. In this work, we use PSLab open-access code, developed IceCube...
Abstract Multi-messenger astrophysics is becoming a major avenue to explore the Universe, with potential span vast range of redshifts. The growing synergies between different probes opening new frontiers, which promise profound insights into several aspects fundamental physics and cosmology. In this context, THESEUS will play central role during 2030s in detecting localizing electromagnetic counterparts gravitational wave neutrino sources that unprecedented sensitivity next generation...
We present the results from multi-wavelength observations of a transient discovered during an intensive follow-up campaign S191213g, gravitational wave (GW) event reported by LIGO-Virgo Collaboration as possible binary neutron star merger in low latency search. This search yielded SN 2019wxt, young galaxy whose sky position (in 80% GW contour) and distance (∼150 Mpc) were plausibly compatible with localisation uncertainty event. Initially, transient’s tightly constrained age, its relatively...
Abstract The emission region of γ -ray bursts (GRBs) is poorly constrained. uncertainty on the size dissipation site spans over 4 orders magnitude (10 12 –10 17 cm) depending unknown energy composition GRB jets. joint multiband analysis from soft X-rays to high energies (up ∼1 GeV) one most energetic and distant GRBs, 220101A ( z = 4.618), allows us make an accurate distinction between prompt early afterglow emissions. enormous amount released by E iso ≈ 3 × 10 54 erg) spectral cutoff at...
Long gamma-ray bursts (GRBs) are believed to originate from core collapse of massive stars. High-redshift GRBs can probe the star formation and reionization history early universe, but their detection remains rare. Here we report a GRB triggered in 0.5--4 keV band by Wide-field X-ray Telescope (WXT) on board Einstein Probe (EP) mission, designated as EP240315a, whose bright peak was also detected Swift Burst Alert Konus-Wind through off-line analyses. At redshift $z=4.859$, EP240315a showed...
Abstract We introduce a new capability of the Neil Gehrels Swift Observatory, dubbed “continuous commanding,” that achieves 10 s latency response time on orbit to unscheduled target-of-opportunity requests received ground. show this will allow respond premerger (early-warning) gravitational-wave (GW) detections, rapidly slewing Burst Alert Telescope (BAT) across sky place GW origin in BAT field view at or before merger time. This dramatically increase GW/gamma-ray burst (GRB) codetection...
$\gamma$-ray bursts (GRBs) are short-lived transients releasing a large amount of energy ($10^{51}-10^{53} $ erg) in the keV-MeV range. GRBs thought to originate from internal dissipation carried by ultra-relativistic jets launched remnant massive star's death or compact binary coalescence. While thousands have been observed over last thirty years, we still an incomplete understanding where and how radiation is generated jet. Here show relation between spectral index flux found investigating...
A large fraction of gamma-ray bursts (GRBs) shows a plateau phase during the X-ray afterglow emission, whose physical origin is still debated. In this work we define sample 30 GRBs with simultaneous and optical data after phase. Through time-resolved spectral analysis plateaus, test consistency unabsorbed fluxes those obtained via X-ray-to-optical extrapolation by assuming synchrotron spectrum. Combining data, find that 63% (19/30) are compatible single spectrum thus suggesting both...
Abstract An energetic γ-ray burst (GRB), GRB 211211A, was observed on 2021 December 11 by the Neil Gehrels Swift Observatory. Despite its long duration, typically associated with bursts produced collapse of massive stars, discovery an optical-infrared kilonova and a quasiperiodic oscillation during gamma-ray precursor points to compact object binary merger origin. The complete understanding this nearby 1 Springer Nature LATEX template 2 GeV emission from (∼ billion light-years) will...
We describe the science case, design and expected performances of X/Gamma-ray Imaging Spectrometer (XGIS), a GRB transients monitor developed studied for THESEUS mission project, capable covering an exceptionally wide energy band (2 keV – 10 MeV), with imaging capabilities location accuracy <15 arcmin up to 150 over Field View 2sr, few hundreds eV resolution in X-ray (<30 keV) micro seconds time whole band. Thanks based on modular approach, XGIS can be easily re-scaled adapted fitting...
The current generation of very-high-energy $gamma-$ray (VHE; E above 30 GeV) detectors (MAGIC and H.E.S.S.) have recently demonstrated the ability to detect afterglow emission GRBs. However, GRB prompt emission, typically observed in 10 keV-10 MeV band, has so far remained undetected at higher energies. Here, we investigate perspectives multi-messenger observations short GRBs VHE. Considering binary neutron star mergers as progenitors GRBs, evaluate joint detection efficiency Cherenkov...