T. Aniello
A5077353629- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Gamma-ray bursts and supernovae
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Gyrotron and Vacuum Electronics Research
- Astrophysical Phenomena and Observations
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Pulsars and Gravitational Waves Research
- Astronomical Observations and Instrumentation
- Terahertz technology and applications
- Laser Design and Applications
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Computational Physics and Python Applications
- Solar and Space Plasma Dynamics
- Radioactivity and Radon Measurements
National Institute for Astrophysics
2022-2024
Turku Centre for Computer Science
2023
University of Turku
2023
MAGIC Telescopes
2022
ABSTRACT In recent years, a new generation of optical intensity interferometers has emerged, leveraging the existing infrastructure Imaging Atmospheric Cherenkov Telescopes (IACTs). The MAGIC telescopes host MAGIC-SII system (Stellar Intensity Interferometer), implemented to investigate feasibility and potential this technique on IACTs. After first successful measurements in 2019, was upgraded now features real-time, dead-time-free, 4-channel, GPU-based correlator. These hardware...
Linelike features in TeV γ rays constitute a "smoking gun" for TeV-scale particle dark matter and new physics. Probing the Galactic Center region with ground-based Cherenkov telescopes enables search spectral immediate association dense reservoir at sensitivity out of reach satellite γ-ray detectors, direct detection collider experiments. We report on 223 hours observations MAGIC stereoscopic telescope system reaching energies up to 100 TeV. improved lines high using large-zenith-angle novel...
Abstract We study the broadband emission of Mrk 501 using multiwavelength observations from 2017 to 2020 performed with a multitude instruments, involving, among others, MAGIC, Fermi's Large Area Telescope (LAT), NuSTAR, Swift, GASP-WEBT, and Owens Valley Radio Observatory. showed an extremely low activity, which may help unravel its baseline emission. Nonetheless, significant flux variations are detected at all wave bands, highest occurring X-rays very-high-energy (VHE) γ -rays. A...
Context. Certain types of supernova remnants (SNRs) in our Galaxy are assumed to be PeVatrons, capable accelerating cosmic rays (CRs) ~ PeV energies. However, conclusive observational evidence for this has not yet been found. The SNR G106.3+2.7, detected at 1–100 TeV energies by different γ-ray facilities, is one the most promising PeVatron candidates. This a cometary shape, which can divided into head and tail region with physical conditions. 100 emission produced identified because limited...
Mrk,421 was in its most active state around early 2010, which led to the highest TeV gamma-ray flux ever recorded from any galactic nuclei (AGN). We aim characterize multiwavelength behavior during this exceptional year for Mrk,421, and evaluate whether it is consistent with picture derived data other less years. investigated period November 5, 2009, (MJD 55140) until July 3, 55380) extensive coverage very-high-energy (VHE; E$,>,$100$,$GeV) gamma rays radio MAGIC, VERITAS Fermi -LAT RXTE...
Blazars exhibit strong variability across the entire electromagnetic spectrum, including periods of high-flux states commonly known as flares. The physical mechanisms in blazar jets responsible for flares remain poorly understood to date. Our aim is better understand emission during using X-ray polarimetry and broadband observations from archetypical TeV Mrk 421, which can be studied with higher accuracy than other blazars that are dimmer and/or located farther away. We a flaring activity...
The blazar TXS 0506+056 got into the spotlight of astrophysical community in September 2017, when a high-energy neutrino detected by IceCube (IceCube-170922A) was associated at 3 $\sigma$ level to $\gamma$-ray flare from this source. This multi-messenger photon-neutrino association remains, as per today, most significant one ever observed. poorly studied object before IceCube-170922A event. To better characterize its broad-band emission, we organized multi-wavelength campaign lasting 16...
Aims. We present the first multiwavelength study of Mrk 501 that contains simultaneous very-high-energy (VHE) γ -ray observations and X-ray polarization measurements from Imaging Polarimetry Explorer (IXPE). Methods. used radio-to-VHE data a campaign carried out between March 1, 2022, July 19, 2022 (MJD 59639 to MJD 59779). The were performed by MAGIC, Fermi -LAT, NuSTAR , Swift (XRT UVOT), several other instruments cover optical radio bands complement IXPE pointings. characterized dynamics...
Gamma-ray bursts (GRBs) are explosive transient events occurring at cosmological distances, releasing a large amount of energy as electromagnetic radiation over several bands. We report the detection long GRB~201216C by MAGIC telescopes. The source is located $z=1.1$ and thus it farthest one detected very high energies. emission above \SI{70}{\GeV} modelled together with multi-wavelength data within synchrotron synchrotron-self Compton (SSC) scenario. find that SSC can explain broadband well...
Aims. We have performed the first broadband study of Mrk 421 from radio to TeV gamma rays with simultaneous measurements X-ray polarization IXPE. Methods. The data were collected as part an extensive multiwavelength campaign carried out between May and June 2022 using MAGIC, Fermi -LAT, NuSTAR , XMM-Newton Swift several optical telescopes complement IXPE data. Results. During exposures, measured 0.2–1 flux was close quiescent state ranged 25% 50% Crab Nebula without intra-night variability....
PG 1553+113 is one of the few blazars with a convincing quasi-periodic emission in gamma-ray band. The source also very high-energy (VHE; >100 GeV) emitter. To better understand its properties and identify underlying physical processes driving variability, MAGIC Collaboration initiated multiyear, multiwavelength monitoring campaign 2015 involving OVRO 40-m Medicina radio telescopes, REM, KVA, Swift Fermi satellites, WEBT network. analysis presented this paper uses data until 2017 focuses on...
Context. The BL Lac object 1ES 0647+250 is one of the few distant γ -ray emitting blazars detected at very high energies (VHEs; ≳100 GeV) during a non-flaring state. It was with MAGIC telescopes period low activity in years 2009−2011 as well three flaring activities 2014, 2019, and 2020, highest VHE flux last epoch. An extensive multi-instrument data set collected part several coordinated observing campaigns over these years. Aims. We aim to characterise long-term multi-band variability...
MAXI J1820+070 is a low-mass X-ray binary with black hole as compact object. This underwent an exceptionally bright outburst from March to October 2018, showing evidence of non-thermal particle population through its radio emission during this whole period. The combined results 59.5 hours observations the H.E.S.S., MAGIC and VERITAS experiments at energies above 200 GeV are presented, together Fermi-LAT data between 0.1 500 GeV, multiwavelength X-rays. Gamma-ray not detected J1820+070, but...
The BL Lac 1ES 2344+514 is known for temporary extreme properties (e.g., a shift of the synchrotron SED peak energy $\nu_{synch,p}$ above 1keV). While those states were so far observed only during high flux levels, additional multi-year observing campaigns are required to achieve coherent picture. Here, we report longest investigation source from radio VHE performed far, focusing on systematic characterisation intermittent states. our results confirm that typically exhibits...
Axion-like particles (ALPs) are pseudo-Nambu-Goldstone bosons that emerge in various theories beyond the standard model. These can interact with high-energy photons external magnetic fields, influencing observed gamma-ray spectrum. This study analyzes 41.3 hrs of observational data from Perseus Galaxy Cluster collected MAGIC telescopes. We focused on spectra radio galaxy center cluster: NGC 1275. By modeling field surrounding this target, we searched for spectral indications ALP presence....
The search for periodicity in the multiwavelength, highly variable emission of blazars is a key feature to understanding dynamical processes at work this class active galactic nuclei. blazar PG 1553+113 an attractive target due evidence periodic oscillations observed different wavelengths, with solid proof 2.2-year modulation detected γ -ray, UV, and optical bands. We aim investigate variability pattern X-ray using more than 10-year-long light curve order robustly assess presence or lack...
ABSTRACT PG 1553 + 113 is one of the few blazars with a convincing quasi-periodic emission in gamma-ray band. The source also very high energy (VHE; >100 GeV) emitter. To better understand its properties and identify underlying physical processes driving variability, MAGIC Collaboration initiated multiyear, multiwavelength monitoring campaign 2015 involving OVRO 40-m Medicina radio telescopes, REM, KVA, Swift Fermi satellites, WEBT network. analysis presented this paper uses data...
ABSTRACT Flat spectrum radio quasars (FSRQs) constitute a class of jetted active galaxies characterized by very luminous accretion disc, prominent and rapidly moving line-emitting cloud structures (broad-line region, BLR), surrounding dense dust structure known as dusty torus. The intense radiation field the disc strongly determines observational properties FSRQs. While hundreds such sources have been detected at GeV energies, only handful them exhibit emission in very-high-energy (VHE,...
OT 081 is a well-known, luminous blazar that remarkably variable in many energy bands. We present the first broadband study of source which includes very-high-energy (VHE, $E>$100\,GeV) $\gamma$-ray data taken by MAGIC and H.E.S.S. imaging Cherenkov telescopes. The discovery VHE emission happened during high state activity July 2016, observed instruments from radio to $\gamma$-rays. identify four states source, one emission. Variability domain found on daily timescales. intrinsic spectrum...
We study a flaring activity of the HSP Mrk421 that was characterized from radio to very-high-energy (VHE; E $>0.1$TeV) gamma rays with MAGIC, Fermi-LAT, Swift, XMM-Newton and several optical telescopes. These observations included, for first time gamma-ray flare blazar, simultaneous X-ray polarization measurements IXPE. find substantial variability in both X-rays VHE throughout campaign, highest flux above 0.2 TeV occurring during IXPE observing window, exceeding twice Crab Nebula. However,...
Abstract OT 081 is a well-known, luminous blazar that remarkably variable in many energy bands. We present the first broadband study of source which includes very-high-energy (VHE, E >100 GeV) γ-ray data taken by MAGIC and H.E.S.S. imaging Cherenkov telescopes. The discovery VHE emission happened during high state activity July 2016, observed instruments from radio to γ-rays. identify four states source, one emission. Variability domain found on daily timescales. intrinsic spectrum...
Aims. LST-1, the prototype of Large-Sized Telescope for upcoming Cherenkov Array Observatory, is concluding its commissioning in Observatorio del Roque de los Muchachos on island La Palma. The proximity LST-1 (Large-Sized 1) to two MAGIC (Major Atmospheric Gamma Imaging Cherenkov) telescopes permits observations same gamma-ray events with both systems. Methods. We describe joint LST-1+MAGIC analysis pipeline and use simultaneous Crab Nebula Monte Carlo simulations assess performance...
MAXI J1820+070 is a low-mass X-ray binary with black hole as compact object. This underwent an exceptionally bright outburst from March to October 2018, showing evidence of non-thermal particle population through its radio emission during this whole period. The combined results 59.5 hours observations the H.E.S.S., MAGIC and VERITAS experiments at energies above 200 GeV are presented, together Fermi-LAT data between 0.1 500 GeV, multiwavelength X-rays. Gamma-ray not detected J1820+070, but...