M. de Pasquale
A5033715606- Gamma-ray bursts and supernovae
- SAS software applications and methods
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Astro and Planetary Science
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Advanced X-ray and CT Imaging
- Power System Reliability and Maintenance
- Atmospheric Ozone and Climate
- Geophysics and Gravity Measurements
- Galaxies: Formation, Evolution, Phenomena
- Medical Imaging Techniques and Applications
- Power System Optimization and Stability
- Astrophysics and Star Formation Studies
- Superconducting and THz Device Technology
- Energy Load and Power Forecasting
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Solar and Space Plasma Dynamics
- Nuclear Physics and Applications
- Atmospheric and Environmental Gas Dynamics
University of Messina
2022-2024
Alcon (China)
2024
Brera Astronomical Observatory
2011-2023
Istanbul University
2017-2022
National Institute for Astrophysics
2015-2019
University of Urbino
2019
Jagiellonian University
2019
Goethe University Frankfurt
2019
University of Bath
2019
American Astronomical Society
2019
With the first direct detection of merging black holes in 2015, era gravitational wave (GW) astrophysics began. A complete picture compact object mergers, however, requires an electromagnetic (EM) counterpart. We report ultraviolet (UV) and X-ray observations by Swift Nuclear Spectroscopic Telescope ARray (NuSTAR) EM counterpart binary neutron star merger GW170817. The bright, rapidly fading emission indicates a high mass ($\approx0.03$ solar masses) wind-driven outflow with moderate...
We report the discovery of unusually bright long-duration gamma-ray burst (GRB), GRB 221009A, as observed by Neil Gehrels Swift Observatory (Swift), Monitor All-sky X-ray Image (MAXI), and Neutron Star Interior Composition Explorer Mission (NICER). This energetic was located relatively nearby (z = 0.151), allowing for sustained observations afterglow. The large luminosity low Galactic latitude (b 4.3 degrees) make 221009A a powerful probe dust in Milky Way. Using echo tomography we map...
Abstract Gamma-ray bursts (GRBs) are classified into long and short events. Long GRBs (LGRBs) associated with the end states of very massive stars, while (SGRBs) linked to merger compact objects. GRB 200826A was a peculiar event, because by definition it an SGRB, rest-frame duration ∼0.5 s. However, this event energetic soft, which is consistent LGRBs. The relatively low redshift ( z = 0.7486) motivated comprehensive, multiwavelength follow-up campaign characterize its host, search for...
The Ultraviolet/Optical Telescope (UVOT) is one of three instruments onboard the Swift observatory. photometric calibration has been published, and this paper follows up with details on other aspects including a measurement point spread function an assessment orbital variation effect photometry. A correction for large-scale variations in sensitivity over field view described, as well model coincidence loss which used to assess extended regions. We have provided detector distortion measured...
We report the Swift discovery of nearby long, soft gamma-ray burst GRB 100316D, and subsequent unveiling its low redshift host galaxy associated supernova. derive event to be z = 0.0591 +/- 0.0001 provide accurate astrometry for GRB-SN. study extremely unusual prompt emission with time-resolved X-ray spectroscopy, find that spectrum is best modelled a thermal component in addition synchrotron peak energy. The light curve has remarkably shallow decay out at least 800 s. bright, blue highly...
The SUperluminous Supernova Host galaxIES (SUSHIES) survey aims to provide strong new constraints on the progenitors of superluminous supernovae (SLSNe) by understanding relationship their host galaxies. We present photometric properties 53 H-poor and 16 H-rich SLSN galaxies out $z\sim4$. model spectral energy distributions derive physical properties, which we compare with other galaxy populations. At low redshift, SLSNe are preferentially found in very blue, low-mass high average specific...
We present the observations of GRB090510 performed by Fermi Gamma-Ray Space Telescope and Swift observatory. This is a bright, short burst that shows an extended emission detected in GeV range. Furthermore, its optical initially rises, feature so far observed only long bursts, while X-ray flux initial shallow decrease, followed steeper decay. exceptional behavior enables us to investigate physical properties GRB outflow, poorly known bursts. discuss internal shock external models for...
Long-duration Gamma-Ray Bursts (GRBs) are an extremely rare outcome of the collapse massive stars, and typically found in distant Universe. Because its intrinsic luminosity ($L\sim 3 \times 10^{53}$ erg s$^{-1}$) relative proximity ($z=0.34$), GRB 130427A was a unique event that reached highest fluence observed gamma-ray band. Here we present comprehensive multiwavelength view with Swift, 2-m Liverpool Faulkes telescopes by other ground-based facilities, highlighting evolution burst emission...
The bright transient AT2018cow has been unlike any other known type of transient. Its high brightness, rapid rise and decay initially nearly featureless spectrum are unprecedented difficult to explain using models for similar burst sources. We present evidence faint gamma-ray emission continuing at least 8 days, spectra in the ultraviolet bands -- both unusual eruptive X-ray variability source a burst-like character. UV-optical does not show CNO line but is well described by blackbody....
Abstract We present James Webb Space Telescope (JWST) and Hubble (HST) observations of the afterglow GRB 221009A, brightest gamma-ray burst (GRB) ever observed. This includes first mid-IR spectra any GRB, obtained with JWST/Near Infrared Spectrograph (0.6–5.5 micron) Mid-Infrared Instrument (5–12 micron), 12 days after burst. Assuming that intrinsic spectral slope is a single power law, F ν ∝ − β , we obtain ≈ 0.35, modified by substantial dust extinction A V = 4.9. suggests above notional...
In this paper we present the results from analysis of a sample 28 gamma-ray burst (GRB) afterglow spectral energy distributions, spanning X-ray through to near-infrared wavelengths. This is largest GRB distributions thus far studied, providing strong handle on optical depth distribution soft absorption and dust-extinction systems in host galaxies. We detect an system within galaxy 79% sample, extinction 71% find Small Magellanic Cloud (SMC) law provide acceptable fit profile for majority...
We present the earliest ultraviolet (UV) observations of bright Type Ia supernova SN 2011fe/PTF11kly in nearby galaxy M101 at a distance only 6.4 Mpc. It was discovered shortly after explosion by Palomar Transient Factory and first observed Swift/UVOT about day explosion. The early UV light is well-defined, with ~20 data points per filter five days These well-sampled form new template curves for comparison other SNe low high redshift. report fits from semi-empirical models find time...
The "ultra-long" gamma-ray burst GRB 111209A at redshift z = 0.677 is the longest ever observed thus far, with a rest frame prompt emission duration of ∼4 hr. In order to explain exceptional longevity, low-metallicity blue supergiant progenitor was invoked. this article we further constrain phenomenology and properties peculiar by performing multiband temporal spectral analysis both afterglow emission. We use proprietary publicly available data from Swift, Konus WIND, XMM-Newton, TAROT, as...
Short duration gamma-ray bursts (SGRBs) are thought to be related the violent merger of compact objects, such as neutron stars or black holes, which makes them promising sources gravitational waves. The detection a 'kilonova'-like signature associated Swift-detected GRB 130603B has suggested that this event is result object merger. Our knowledge on SGRB been, until now, mostly based absence supernova signatures and analysis host galaxies they cannot always securely associated. Further...
The short gamma-ray burst (GRB) 170817A was the first GRB associated with a gravitational-wave event. Due to exceptionally low luminosity of prompt $\gamma$-ray and afterglow emission, origin both radiation components is highly debated. most discussed models for include regular jet seen off-axis emission from cocoon encompassing "choked" jet. Here, we report radio-frequency observations at 610 1390~MHz obtained Giant Metrewave Radio Telescope (GMRT). Our span range $\sim7$ $\sim152$ days...
Using a sample of gamma-ray burst (GRB) afterglows detected by both the X-Ray Telescope (XRT) and UV/Optical (UVOT) on Swift, we modelled spectral energy distributions (SEDs) to determine gas column densities dust extinction in GRB local environment. In six out seven cases find an X-ray absorber associated with host galaxy density (assuming solar abundances) ranging from (0.8–7.7) × 1021 cm−2. We rest-frame visual AV using Small Magellanic Cloud (SMC), Large (LMC) Galactic curves model...
Swift triggered on a precursor to the main burst of GRB 061121 (z=1.314), allowing observations be made from optical gamma-ray bands. Many other telescopes, including Konus-Wind, XMM-Newton, ROTSE and Faulkes Telescope North, also observed burst. The gamma-ray, X-ray UV/optical emission all showed peak ~75s after trigger, although afterglow components appear early - before, or during, peak. Spectral evolution was seen throughout burst, with prompt showing clear positive correlation between...
The new and extreme population of gamma-ray bursts (GRBs) detected by the Fermi Large Area Telescope (LAT) shows several features in high-energy gamma rays that are providing interesting unexpected clues into GRB prompt afterglow emission mechanisms. Over last six years, it has been Swift provided robust data set UV/optical X-ray observations opened many windows components structure. relationship between LAT-detected GRBs well-studied, fainter, less energetic Burst Alert is only beginning to...