S. Lombardi
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View article: To cut or not to cut: Data-quality evaluation for the ASTRI Mini-Array
To cut or not to cut: Data-quality evaluation for the ASTRI Mini-Array Open
The ASTRI Mini-Array consists of nine Cherenkov telescopes under construction at the Observatorio del Teide, with one of them already performing observations since November 2024. Given the complexity of the analysis of gamma-ray data acqui…
View article: Learning from ASTRI-Horn: products and applications of Variance data
Learning from ASTRI-Horn: products and applications of Variance data Open
In the context of the ASTRI MiniArray project (9 dual-mirror air Cherenkov telescopes being installed at the Observatorio del Teide in the Canary Islands), the ASTRI- Horn prototype was previously implemented in Italy (Sicily). It was a cr…
View article: The New Architecture of the Online Observation Quality System for the ASTRI Mini-Array Project
The New Architecture of the Online Observation Quality System for the ASTRI Mini-Array Project Open
The ASTRI Mini-Array is an international collaboration led by the Italian National Institute for Astrophysics. The project aims to construct and operate an array of nine Imaging Atmospheric Cherenkov Telescopes to study gamma-ray sources a…
View article: Machine Learning-Enhanced Discrimination of Gamma-Ray and Hadron Events Using Temporal Features: An ASTRI Mini-Array Analysis
Machine Learning-Enhanced Discrimination of Gamma-Ray and Hadron Events Using Temporal Features: An ASTRI Mini-Array Analysis Open
Imaging Atmospheric Cherenkov Telescopes (IACTs) have revolutionized our understanding of the universe at very high energies (VHEs), enabling groundbreaking discoveries of extreme astrophysical phenomena. These instruments capture the brie…
View article: Effects of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">H</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> low beam irradiation and high field pulsing tests in different metals
Effects of low beam irradiation and high field pulsing tests in different metals Open
This work studies the suitability of a set of different materials for manufacturing more efficient and durable radio-frequency quadrupole (RFQ) structures compared to that currently used in many linear particle accelerators, traditionally …
View article: Multiwavelength study of OT 081: broadband modelling of a transitional blazar
Multiwavelength study of OT 081: broadband modelling of a transitional blazar Open
OT 081 is a well-known, luminous blazar that is remarkably variable in many energy bands. We present the first broadband study of the source, which includes very high energy (VHE, $E\gt $ 100 GeV) $\gamma$-ray data taken by the MAGIC (Majo…
View article: Multi-wavelength study of OT 081: broadband modelling of a transitional blazar
Multi-wavelength study of OT 081: broadband modelling of a transitional blazar Open
OT 081 is a well-known, luminous blazar that is remarkably variable in many energy bands. We present the first broadband study of the source which includes very-high-energy (VHE, $E>$100\,GeV) $γ$-ray data taken by the MAGIC and H.E.S.S. i…
View article: The Online Observation Quality System Implementation for the ASTRI Mini-Array Project
The Online Observation Quality System Implementation for the ASTRI Mini-Array Project Open
The ASTRI Mini-Array project, led by the Italian National Institute for Astrophysics, aims to construct and operate nine Imaging Atmospheric Cherenkov Telescopes for high-energy gamma-ray source study and stellar intensity interferometry. …
View article: Software architecture and development approach for the ASTRI Mini-Array project at the Teide Observatory
Software architecture and development approach for the ASTRI Mini-Array project at the Teide Observatory Open
The Astrophysics with Italian Replicating Technology Mirrors (ASTRI) Mini-Array is an international collaboration led by the Italian National Institute for Astrophysics (INAF) and devoted to imaging atmospheric Cherenkov light for very-hig…
View article: Multi-year characterisation of the broad-band emission from the intermittent extreme BL Lac 1ES 2344+514
Multi-year characterisation of the broad-band emission from the intermittent extreme BL Lac 1ES 2344+514 Open
Aims. The BL Lac 1ES 2344+514 is known for temporary extreme properties characterised by a shift of the synchrotron spectral energy distribution (SED) peak energy νsynch;p above 1 keV. While those extreme states have only been observed dur…
View article: Status of the SST Camera for the Cherenkov Telescope Array
Status of the SST Camera for the Cherenkov Telescope Array Open
The Cherenkov Telescope Array will be the next generation ground-based gamma ray observatory in the energy range from few tens of GeV to hundreds of TeV. It will be built on two sites, one for each hemisphere, to cover the entire sky. The …
View article: Generation of Instrument Response Functions and Event-lists of data-level 3 for the ASTRI Mini-Array
Generation of Instrument Response Functions and Event-lists of data-level 3 for the ASTRI Mini-Array Open
The ASTRI Mini-Array is an international project to build and operate a facility to study astronomical sources emitting very high-energy 𝛾-rays in the 1–200 TeV energy band. It will be an array of nine small-sized (4-m diameter) and large …
View article: The ASTRI Mini-Array observations of TeV transient events
The ASTRI Mini-Array observations of TeV transient events Open
After about five years since the first detection of a very high energy (VHE) emission component from gamma-ray bursts (GRBs), efforts in improving the follow-up observation programs on transient events by the most important VHE instruments…
View article: The Data Processing System of the ASTRI Mini-Array Project
The Data Processing System of the ASTRI Mini-Array Project Open
The ASTRI Mini-Array is an international project to build and operate an array of nine small-sized (4-m diameter) Imaging Atmospheric Cherenkov Telescopes (IACTs) at the Observatorio del Teide (Tenerife, Spain). The array is designed to pe…
View article: Deep Learning techniques for reconstruction on ASTRI Mini-Array Monte Carlo data
Deep Learning techniques for reconstruction on ASTRI Mini-Array Monte Carlo data Open
The interaction of gamma rays and cosmic rays with the Earth’s atmosphere initiate air showers that, in turn, induce the emission of Cherenkov photons detectable by ground-based Imaging Atmospheric Cherenkov Telescopes (IACTs). Any data an…
View article: The Stereo Event Builder software system of the ASTRI Mini-Array
The Stereo Event Builder software system of the ASTRI Mini-Array Open
The Stereo Event Builder (SEB) software system of the ASTRI Mini-Array is the part of the\noff-line data processing chain that is responsible for identifying single and stereo Cherenkov\nevents. The ASTRI Mini-Array is an international pro…
View article: The ASTRI Mini-Array calibration software system
The ASTRI Mini-Array calibration software system Open
The ASTRI Mini-Array is an INAF project aimed to observe astronomical sources emitting at very high-energy in the TeV spectral band. It consists of an array of nine innovative Imaging Atmospheric Cherenkov Telescopes that are an evolution …
View article: The ASTRI Mini-Array Simulation System
The ASTRI Mini-Array Simulation System Open
The ASTRI Mini-Array is an INAF project aimed at observing astronomical objects that emit photons in the TeV and multi-TeV spectral bands. It consists of an array of nine innovative imaging atmospheric Cherenkov telescopes under deployment…
View article: Observation of the Crab Nebula with the ASTRI-Horn telescope in 2022/2023
Observation of the Crab Nebula with the ASTRI-Horn telescope in 2022/2023 Open
The Italian National Institute for Astrophysics (INAF) is leading the ASTRI Project, whose main objective in the early years was the design, development and deployment of an end-to-end dual- mirror 4-m diameter prototype of the Cherenkov T…
View article: Performance of the ASTRI Mini-Array with different levels of the Night Sky Background
Performance of the ASTRI Mini-Array with different levels of the Night Sky Background Open
The ASTRI Mini-Array is an array of nine small-sized (4-m diameter) and large field of view ($\\sim$10$^\\circ$) imaging atmospheric Cherenkov telescopes under deployment at the {\\itshape Observatorio del Teide} (Tenerife, Spain). The sys…
View article: Status of the ASTRI program: technology and science with wide-field aplanatic IACT telescopes
Status of the ASTRI program: technology and science with wide-field aplanatic IACT telescopes Open
The ASTRI program began about 10 years ago aiming at the development of pathfinders of small-\nsize (4 m diameter) dual-mirror aplanatic wide-field IACT telescopes in view of the implementation\nof the array of small-size telescopes (SSTs)…
View article: The ASTRI Mini-Array Cherenkov Data Pipeline
The ASTRI Mini-Array Cherenkov Data Pipeline Open
The ASTRI Mini-Array is an international project led by INAF and devoted to imaging atmospheric Cherenkov light for very high-energy $\\gamma$-ray astronomy.\nThe project is deploying an array of nine imaging atmospheric Cherenkov telescop…
View article: Status and performance of the ASTRI-Horn dual mirror air-Cherenkov telescope after a major maintenance and refurbishment intervention
Status and performance of the ASTRI-Horn dual mirror air-Cherenkov telescope after a major maintenance and refurbishment intervention Open
The ASTRI-Horn telescope has been developed under the leadership of the Italian National\nInstitute for Astrophysics (INAF) as a prototype of a compact aplanatic dual-mirror (4 m diameter) Imaging Atmospheric Cherenkov Telescope (IACT) wit…
View article: Application of Machine Learning Ensemble Methods to ASTRI Mini-Array Cherenkov Event Reconstruction
Application of Machine Learning Ensemble Methods to ASTRI Mini-Array Cherenkov Event Reconstruction Open
The Imaging Atmospheric Cherenkov technique has opened up previously unexplored windows for the study of astrophysical radiation sources in the very high-energy (VHE) regime and is playing an important role in the discovery and characteriz…
View article: A lower bound on intergalactic magnetic fields from time variability of 1ES 0229+200 from MAGIC and<i>Fermi</i>/LAT observations
A lower bound on intergalactic magnetic fields from time variability of 1ES 0229+200 from MAGIC and<i>Fermi</i>/LAT observations Open
Context. Extended and delayed emission around distant TeV sources induced by the effects of propagation of γ ray s through the intergalactic medium can be used for the measurement of the intergalactic magnetic field (IGMF). Aims. We search…