E. Antolini
A5016793294- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Particle Accelerators and Free-Electron Lasers
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Nuclear Physics and Applications
- SARS-CoV-2 and COVID-19 Research
- PARP inhibition in cancer therapy
- Telomeres, Telomerase, and Senescence
- Neutrino Physics Research
- RNA modifications and cancer
- Autophagy in Disease and Therapy
- Cancer Genomics and Diagnostics
- Pulsars and Gravitational Waves Research
- Genomics and Rare Diseases
- Solar and Space Plasma Dynamics
- Vascular Malformations and Hemangiomas
- Tuberous Sclerosis Complex Research
- Congenital heart defects research
- Astrophysics and Star Formation Studies
University of Siena
2023-2025
Marche Polytechnic University
2024
CTA Observatory
2019
University of Perugia
2010-2018
Istituto Nazionale di Fisica Nucleare, Sezione di Perugia
2010-2015
Istituto Nazionale di Fisica Nucleare
2010
ABSTRACT We present a catalog of high-energy gamma-ray sources detected by the Large Area Telescope (LAT), primary science instrument on Fermi Gamma-ray Space (Fermi) , during first 11 months phase mission, which began 2008 August 4. The First -LAT (1FGL) contains 1451 and characterized in 100 MeV to GeV range. Source detection was based average flux over month period, threshold likelihood Test Statistic is 25, corresponding significance just 4σ. 1FGL includes source location regions,...
We present the second catalog of high-energy gamma-ray sources detected by Large Area Telescope (LAT), primary science instrument on Fermi Gamma-ray Space (Fermi), derived from data taken during first 24 months phase mission, which began 2008 August 4. Source detection is based average flux over 24-month period. The Second Fermi-LAT (2FGL) includes source location regions, defined in terms elliptical fits to 95% confidence regions and spectral power-law, exponentially cutoff or log-normal...
The Cherenkov Telescope Array, CTA, will be the major global observatory for very high energy gamma-ray astronomy over next decade and beyond. scientific potential of CTA is extremely broad: from understanding role relativistic cosmic particles to search dark matter. an explorer extreme universe, probing environments immediate neighbourhood black holes voids on largest scales. Covering a huge range in photon 20 GeV 300 TeV, improve all aspects performance with respect current instruments....
The second catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope (LAT) in two years scientific operation is presented. LAT AGN (2LAC) includes 1017 γ-ray sources located at high Galactic latitudes (|b| > 10°) that are with a test statistic (TS) greater than 25 and associated statistically AGNs. However, some these affected analysis issues multiple Consequently, we define Clean Sample which 886 AGNs, comprising 395 BL Lacertae objects (BL Lac objects), 310...
We present the first catalog of active galactic nuclei (AGNs) detected by Large Area Telescope (LAT), corresponding to 11 months data collected in scientific operation mode. The First LAT AGN Catalog (1LAC) includes 671 γ-ray sources located at high Galactic latitudes (|b|>10°) that are with a test statistic greater than 25 and associated statistically AGNs. Some multiple AGNs, consequently, 709 comprising 300 BL Lacertae objects, 296 flat-spectrum radio quasars, 41 AGNs other types, 72...
This paper presents light curves as well the first systematic characterization of variability 106 objects in high-confidence Fermi Large Area Telescope Bright AGN Sample (LBAS). Weekly this sample, obtained during 11 months survey (2008 August 4–2009 July 4), are tested for and their properties quantified through autocorrelation function structure analysis. For brightest sources, 3 or 4 day binned extracted order to determine power density spectra (PDSs) fit temporal major flares. More than...
This is the first of a series papers aimed at characterizing populations detected in high-latitude sky Fermi-LAT survey. In this work, we focus on intrinsic spectral and flux properties source sample. We show that when selection effects are properly taken into account, Fermi sources average steeper than previously found (e.g., bright list) with an photon index 2.40 ± 0.02 over entire 0.1–100 GeV energy band. confirm flat spectrum radio quasars have spectra BL Lacertae objects 2.48 versus...
The Fermi Large Area Telescope First Source Catalog (1FGL) provided spatial, spectral, and temporal properties for a large number of gamma-ray sources using uniform analysis method. After correlating with the most-complete catalogs source types known to emit gamma rays, 630 these are "unassociated" (i.e. have no obvious counterparts at other wavelengths). Here, we employ two statistical analyses primary characteristics unassociated in an effort correlate their AGN pulsar populations 1FGL....
The gamma-ray emission in broad-line blazars is generally explained as inverse Compton (IC) radiation of relativistic electrons the jet scattering optical-UV photons from Broad Line Region (BLR), so-called BLR External scenario. We test this scenario on Fermi spectra 106 detected with highest significance or largest BLR, by looking for cut-off signatures at high energies compatible gamma-gamma interactions photons. do not find evidence expected absorption. For 2/3 sources, we can exclude any...
We investigate the Fermi Large Area Telescope γ-ray and 15 GHz Very Long Baseline Array radio properties of a joint radio-selected sample active galactic nuclei (AGNs) obtained during first 11 months mission (2008 August 4–2009 July 5). Our contains brightest 173 AGNs in these bands above declination −30° this period, thus probes full range loudness (γ-ray to band luminosity ratio) bright blazar population. The latter quantity spans at least 4 orders magnitude, reflecting wide spectral...
We report on the multi-wavelength observations of PKS 1510-089 (a flat spectrum radio quasar (FSRQ) at z = 0.361) during its high activity period between 2008 September and 2009 June. During this 11 month period, source was characterized by a complex variability optical, UV, γ-ray bands, timescales down to 6–12 hr. The brightest isotropic luminosity, recorded March 26, ≃2 × 1048 erg s−1. in Fermi Large Area Telescope energy range shows mild curvature described well log-parabolic law, can be...
The high-frequency-peaked BL Lacertae object RGB J0710+591 was observed in the very high-energy (VHE; E > 100 GeV) wave band by VERITAS array of atmospheric Cherenkov telescopes. observations, taken between 2008 December and 2009 March totaling 22.1 hr, yield discovery VHE gamma rays from source. is detected at a statistical significance 5.5 standard deviations (5.5σ) above background, corresponding to an integral flux (3.9 +/- 0.8) x 10-12 cm-2 s-1 (3% Crab Nebula's flux) 300 GeV....
We report on the first detection of very high-energy (VHE) gamma-ray emission from Crab Nebula by a Cherenkov telescope in dual-mirror Schwarzschild-Couder (SC) configuration. The result has been achieved means 4 m size ASTRI-Horn telescope, operated Mt. Etna (Italy) and developed context Telescope Array Observatory preparatory phase. SC design is aplanatic characterized small plate scale, allowing us to implement large field view cameras with small-size pixel sensors high compactness....
We report on observations of BL Lacertae during the first 18 months Fermi-LAT science operations and present results from a 48-day multifrequency coordinated campaign 2008 August 19 to October 7. The radio gamma-ray behavior Lac is unveiled low activity state thanks radio-band (Metsahovi VLBA), near-IR/optical (Tuorla, Steward, OAGH MDM) X-ray (RXTE Swift) observatories. No variability was resolved in gamma-rays campaign, brightness level 15 times lower than 1997 EGRET outburst. Moderate...
In this paper we present the Fermi All-sky Variability Analysis (FAVA), a tool to systematically study variability of gamma-ray sky measured by Large Area Telescope (LAT) on board Gamma-ray Space Telescope. For each direction sky, FAVA compares number gamma rays observed in given time window expected for average emission detected from that direction. This method is used weekly intervals derive list 215 flaring sources. We proceed discuss 27 sources found at Galactic latitudes smaller than 10...
The discovery of rapidly variable Very High Energy (VHE; E > 100 GeV) gamma-ray emission from 4C +21.35 (PKS 1222+216) by MAGIC on 2010 June 17, triggered the high activity detected Fermi Large Area Telescope (LAT) in energy (HE; MeV) gamma-rays, poses intriguing questions location emitting region this flat spectrum radio quasar. We present multifrequency data collected centimeter to VHE during investigate properties source and discuss a possible model. first hint detection at was observed...
We report on the gamma-ray observations of giant molecular clouds Orion A and B with Large Area Telescope (LAT) on-board Fermi Gamma-ray Space Telescope. The emission in energy band between \sim100 MeV GeV is predicted to trace gas mass distribution through nuclear interactions Galactic cosmic rays (CRs) interstellar gas. production cross-section for interaction known \sim10% precision which makes LAT a powerful tool measure column density CR intensity. present here such distributions B,...
We report on multiwavelength observations of the blazar PKS 0537−441 (z = 0.896) obtained from microwaves through γ-rays by Submillimeter Array, Rapid Eye Mounting, Automatic Telescope for Optical Monitoring (ATOM), Swift and Fermi mostly during 2008 August–2010 April. Strong variability has been observed in γ-rays, with two major flaring episodes (2009 July 2010 March) a harder-when-brighter behaviour, quite common flat spectrum radio quasars low-synchrotron-peaked BL Lacertae objects (BL...
Abstract Background Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is a novel coronavirus that caused an ongoing pandemic of pathology termed Disease 19 (COVID-19). Several studies reported both COVID-19 and RTEL1 variants are associated with shorter telomere length, but direct association between the two not generally acknowledged. Here we demonstrate up to 8.6% severe patients bear ultra-rare variants, show how this subgroup can be recognized. Methods A cohort 2246...
Abstract The clinical manifestations of SARS-CoV-2 infection vary widely among patients, from asymptomatic to life-threatening. Host genetics is one the factors that contributes this variability as previously reported by COVID-19 Genetics Initiative (HGI), which identified sixteen loci associated with severity. Herein, we investigated genetic determinants mortality, performing a case-only genome-wide survival analysis, 60 days after infection, 3904 patients GEN-COVID and other European...
The Fermi Large Area Telescope (LAT) data have confirmed the pulsed emission from all six high-confidence gamma-ray pulsars previously known EGRET observations. We report results obtained analysis of 13 months LAT for three these (PSR J1057-5226, PSR J1709-4429, and J1952+3252) each which had some unique feature among pulsars. excellent sensitivity allows more detailed evolution pulse profile with energy also variation spectral shape phase. measure cutoff first time provide a complete...
The Cherenkov Telescope Array (CTA) represents the most advanced facility designed for Astronomy. ASTRI SST-2M has been developed as a demonstrator Small Size in context of upcoming CTA. Its main innovation consists optical layout which implements Schwarzschild-Couder configuration and is fully validated first time. system qualified example two mirrors telescope This permits to (i) maintain high quality across large FoV (ii) de-magnify plate scale, (iii) exploit new technological solutions...
We present the results from Suzaku X-ray observations of five flat-spectrum radio quasars (FSRQs), namely PKS 0208−512, Q 0827+243, 1127−145, 1510−089, and 3C 454.3. All these sources were additionally monitored simultaneously or quasi-simultaneously by Fermi satellite in gamma rays Swift UVOT UV optical bands, respectively. constructed their broadband spectra covering frequency range 1014 Hz up to 1025 Hz, those reveal nature high-energy emission luminous blazars low-activity states. The...