A5055642729- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Particle Detector Development and Performance
- Astro and Planetary Science
- Pulsars and Gravitational Waves Research
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Superconducting and THz Device Technology
- SAS software applications and methods
- Galaxies: Formation, Evolution, Phenomena
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Dark Matter and Cosmic Phenomena
- Adaptive optics and wavefront sensing
- Calibration and Measurement Techniques
- Solar and Space Plasma Dynamics
- Advanced X-ray Imaging Techniques
- CCD and CMOS Imaging Sensors
- Spacecraft and Cryogenic Technologies
- Astrophysics and Star Formation Studies
- Scientific Measurement and Uncertainty Evaluation
- Radio Astronomy Observations and Technology
National Institute for Astrophysics
2016-2025
Institute for Space Astrophysics and Planetology
2015-2024
Center for Biomolecular Nanotechnologies
2020-2021
Italian Institute of Technology
2020-2021
University of Salento
2020-2021
Innovation Engineering (Italy)
2021
University of Palermo
2009-2018
Osservatorio di Astrofisica e Scienza dello Spazio
2018
Arca Progetti (Italy)
2018
SRON Netherlands Institute for Space Research
2006-2018
We present the main results of a study spectral and energetics properties twelve gamma-ray bursts (GRBs) with redshift estimates. All GRBs in our sample were detected by BeppoSAX broad energy range (2–700 ). From estimates good-quality time–integrated spectra we deduce their cosmological rest frames. are satisfactorily represented Band model, no significant soft X–ray excesses or absorptions. find positive correlation between estimated total (isotropic) energies 1–10 000 (Erad) redshifts z....
The X-ray satellite SAX, a major program of the Italian Space Agency with participation Netherlands for Aereospace Programs, was launched on April 30 1996 from Cape Canaveral. After launch it renamed BeppoSAX in honour Giuseppe (Beppo) Occhialini. payload is characterized by very wide spectral coverage 0.1 to 300 keV, well balanced performances both its low and high energy instrumentation. Its sensitivity will allow exploitation full band weak sources (1/20 3C 273), opening new perspectives...
This White Paper, submitted to the recent ESA call for science themes define its future large missions, advocates need a transformational leap in our understanding of two key questions astrophysics: 1) How does ordinary matter assemble into scale structures that we see today? 2) do black holes grow and shape Universe? Hot gas clusters, groups intergalactic medium dominates baryonic content local Universe. To understand astrophysical processes responsible formation assembly these structures,...
We present our broadband study of GW170817 from radio to hard X-rays, including NuSTAR and Chandra observations up 165 days after the merger, a multi-messenger analysis LIGO constraints. The data are compared with predictions wide range models, providing first detailed comparison between non-trivial cocoon jet models. Homogeneous power-law shaped jets, as well simple models ruled out by data, while both Gaussian energy injection can describe current dataset for reasonable physical...
The X-ray Integral Field Unit (X-IFU) is the high resolution spectrometer of ESA Athena observatory. Over a field view 5' equivalent diameter, it will deliver spectra from 0.2 to 12 keV with spectral 2.5 eV up 7 on ∼ 5" pixels. X-IFU based large format array super-conducting molybdenum-gold Transition Edge Sensors cooled at 90 mK, each coupled an absorber made gold and bismuth pitch 249 μm. A cryogenic anti-coincidence detector located underneath prime TES enables non background be reduced....
We present the results of our year-long afterglow monitoring GW170817, first binary neutron star (NS) merger detected by advanced LIGO and Virgo. New observations with Australian Telescope Compact Array (ATCA) Chandra X-ray were used to constrain its late-time behavior. The broadband emission, from radio X-rays, is well-described a simple power-law spectrum index ~0.585 at all epochs. After an initial shallow rise ~t^0.9, displayed smooth turn-over, reaching peak luminosity ~5e39 erg/s 160...
Abstract The Einstein Probe (EP) is an interdisciplinary mission of time-domain and X-ray astronomy. Equipped with a wide-field lobster-eye focusing imager, EP will discover cosmic transients monitor the variability known sources in 0.5–4 keV, at combination detecting sensitivity cadence that not accessible to previous current monitoring missions. can perform quick characterisation or outbursts Wolter-I telescope onboard. In this paper, science objectives are presented. expected enlarge...
We report on the discovery of two emission features observed in x-ray spectrum afterglow gamma-ray burst (GRB) 16 December 1999 by Chandra X-ray Observatory. These are identified with Ly(alpha) line and narrow recombination continuum hydrogenic ions iron at a redshift z = 1.00 +/- 0.02, providing an unambiguous measurement distance GRB. Line width intensity imply that progenitor GRB was massive star system ejected, before event, quantity approximately 0.01 mass sun velocity 0.1 speed light,...
We present optical, X-ray and gamma-ray observations of GRB 111209A, observed at a redshift z = 0.677. show that this event was active in its prompt phase for about 25000 s, making it the longest burst ever observed. This rare could have been detected up to ∼ 1.4 gamma-rays. Compared other long bursts (GRBs), 111209A is clear outlier energy-fluence duration plane. The high-energy emission shows no sign strong blackbody component, signature tidal disruption event, or supernova shock breakout....
Multimessenger observations of GW170817 have not conclusively established whether the merger remnant is a black hole (BH) or neutron star (NS). We show that long-lived magnetized NS with poloidal field B ≈ 1012 G fully consistent electromagnetic dataset, when spin-down losses are dominated by gravitational wave (GW) emission. The required ellipticity ε ≳ 10−5 can result from toroidal magnetic component much stronger than component, configuration expected an newly formed merger. Abrupt...
The X-ray Integral Field Unit (X-IFU) on board the Advanced Telescope for High-ENergy Astrophysics (Athena) will provide spatially resolved high-resolution spectroscopy from 0.2 to 12 keV, with 5 arc second pixels over a field of view minute equivalent diameter and spectral resolution 2.5 eV up 7 keV. In this paper, we first review core scientific objectives Athena, driving main performance parameters X-IFU, namely resolution, view, effective area, count rate capabilities, instrumental...
The recent discovery of a faint gamma-ray burst (GRB) coincident with the gravitational wave (GW) event GW 170817 revealed existence population low-luminosity short duration transients produced by neutron star mergers in nearby Universe. These events could be routinely detected existing monitors, yet previous observations failed to identify them without aid triggers. Here we show that GRB150101B was an analogue GRB170817A located at cosmological distance. GRB 150101B characterized bright...
Observations of the X‐ray sky after next decade will most likely be dominated by Athena (Advanced Telescope for High ENergy Astrophysics), second large mission ESA 's Cosmic Vision 2015–2035 programme. has been conceived to address “Hot and Energetic Universe” science theme, which focuses on assembly evolution hot baryons in cosmic structures as well physics energetic output generated accreting super‐massive black holes, along with relationship between two processes, dubbed feedback. Thanks...
ABSTRACT Recent observations with the Chandra X-ray telescope continue to detect emission from transient GW170817. In a total exposure of 96.6 ks, performed between 2020 March 9 and 16 (935–942 d after merger), 8 photons are measured at source position, corresponding significance ≈5σ. Radio monitoring Australian Telescope Compact Array (ATCA) shows instead that has faded below our detection threshold (<33 $\mu$Jy, 3σ). By assuming constant spectral index β = 0.585, we derive an...