L. Foffano
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View article: VHE γ-ray observations of bright BL Lacs with the Large-Sized Telescope prototype (LST-1) of the CTAO
VHE γ-ray observations of bright BL Lacs with the Large-Sized Telescope prototype (LST-1) of the CTAO Open
Cherenkov Telescope Array Observatory (CTAO) is the next-generation ground-based $\gamma$-ray observatory operating in the energy range from $20\, \mathrm{GeV}$ up to $300\, \mathrm{TeV}$, with two sites in La Palma (Spain) and Paranal (Ch…
View article: Exploring the Most Extreme Blazars: New Insights from MAGIC
Exploring the Most Extreme Blazars: New Insights from MAGIC Open
Extremely high-peaked BL Lac objects (or extreme blazars) are unique extragalactic laboratories where particle acceleration processes are pushed at their physical limits. In these blazars, synchrotron emission peaking above keV energies is…
View article: VHE $γ$-ray observations of bright BL Lacs with the Large-Sized Telescope prototype (LST-1) of the CTAO
VHE $γ$-ray observations of bright BL Lacs with the Large-Sized Telescope prototype (LST-1) of the CTAO Open
Cherenkov Telescope Array Observatory (CTAO) is the next-generation ground-based gamma-ray observatory operating in the energy range from 20 GeV up to 300 TeV, with two sites in La Palma (Spain) and Paranal (Chile). It will consist of tele…
View article: Exploring GRB Afterglows in the TeV Era: New Diagnostics of Particle Acceleration
Exploring GRB Afterglows in the TeV Era: New Diagnostics of Particle Acceleration Open
The TeV gamma-ray band is essential for probing the most extreme particle acceleration processes in the Universe. The recent detections of gamma-ray bursts (GRBs) at these energies offer an incredible opportunity to investigate the origins…
View article: Constraining the TeV gamma-ray emission of SN 2024bch, a possible type IIn-L from a red supergiant progenitor
Constraining the TeV gamma-ray emission of SN 2024bch, a possible type IIn-L from a red supergiant progenitor Open
We present very high-energy optical photometry and spectroscopic observations of SN 2024bch in the nearby galaxy NGC 3206 (∼20 Mpc). We used gamma-ray observations performed with the first Large-Sized Telescope (LST-1) of the Cherenkov Tel…
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: 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
View article: Exploring the Most Extreme Blazars: New Insights from MAGIC
Exploring the Most Extreme Blazars: New Insights from MAGIC Open
View article: Exploring GRB Afterglows in the TeV Era: New Diagnostics of Particle Acceleration
Exploring GRB Afterglows in the TeV Era: New Diagnostics of Particle Acceleration Open
View article: TeV Afterglows of Gamma-Ray Bursts: Theoretical Analysis and Prospects for Future Observations
TeV Afterglows of Gamma-Ray Bursts: Theoretical Analysis and Prospects for Future Observations Open
Recent detections of gamma-ray bursts (GRBs) at TeV energies opened new prospects for investigating radiative environments and particle acceleration mechanisms under extreme conditions. In this paper, we study the afterglows of these GRBs—…
View article: Very high energy observations of the Seyfert galaxy NGC 4151 with MAGIC
Very high energy observations of the Seyfert galaxy NGC 4151 with MAGIC Open
Seyfert galaxies are emerging as a promising source class of high-energy neutrinos. The Seyfert galaxies NGC 4151 and NGC 1068 have respectively come up as the most promising counterparts of a 3 σ and of a 4.2 σ neutrino excesses detected …
View article: GRB 221009A: Observations with LST-1 of CTAO and Implications for Structured Jets in Long Gamma-Ray Bursts
GRB 221009A: Observations with LST-1 of CTAO and Implications for Structured Jets in Long Gamma-Ray Bursts Open
GRB 221009A is the brightest gamma-ray burst (GRB) observed to date. Extensive observations of its afterglow emission across the electromagnetic spectrum were performed, providing the first strong evidence of a jet with a nontrivial angula…
View article: Very-high-energy observations of the Seyfert galaxy NGC 4151 with MAGIC -- Indication of another gamma-ray obscured candidate neutrino source
Very-high-energy observations of the Seyfert galaxy NGC 4151 with MAGIC -- Indication of another gamma-ray obscured candidate neutrino source Open
Seyfert galaxies are emerging as a promising source class of high-energy neutrinos. The Seyfert galaxies NGC 4151 and NGC 1068 have come up respectively as the most promising counterparts of a 3$σ$ and of a 4.2$σ$ neutrino excesses detecte…
View article: Testing the ubiquitous presence of very high energy emission in gamma-ray bursts with the MAGIC telescopes
Testing the ubiquitous presence of very high energy emission in gamma-ray bursts with the MAGIC telescopes Open
Gamma-ray bursts (GRBs) are the most powerful transient objects in the Universe, and they are a primary target for the MAGIC Collaboration. Recognizing the challenges of observing these elusive objects with Imaging Atmospheric Cherenkov Te…
View article: Testing the ubiquitous presence of very high energy emission in gamma-ray bursts with the MAGIC telescopes
Testing the ubiquitous presence of very high energy emission in gamma-ray bursts with the MAGIC telescopes Open
Gamma-ray bursts (GRBs) are the most powerful transient objects in the Universe, and they are a primary target for the MAGIC Collaboration. Recognizing the challenges of observing these elusive objects with Imaging Atmospheric Cherenkov Te…
View article: Detection of the Geminga pulsar at energies down to 20 GeV with the LST-1 of CTAO
Detection of the Geminga pulsar at energies down to 20 GeV with the LST-1 of CTAO Open
Context. Geminga is the third gamma-ray pulsar firmly detected by imaging atmospheric Cherenkov telescopes (IACTs) after the Crab and the Vela pulsars. Most of its emission is expected at tens of giga-electronvolts, and, out of the planned…
View article: Erratum: “AGILE Gamma-Ray Detection of the Exceptional GRB 221009A” (2023, ApJL, 956, L23)
Erratum: “AGILE Gamma-Ray Detection of the Exceptional GRB 221009A” (2023, ApJL, 956, L23) Open
View article: Very high-energy gamma-ray detection and long-term multiwavelength view of the flaring blazar B2 1811+31
Very high-energy gamma-ray detection and long-term multiwavelength view of the flaring blazar B2 1811+31 Open
Context. Among the blazars whose emission has been detected up to very high-energy (VHE; 100 GeV< E <100 TeV) γ rays, intermediate synchrotron-peaked BL Lacs (IBLs) are quite rare. The IBL B2 1811+31 ( z = 0.117) exhibited intense flaring …
View article: Combined search in dwarf spheroidal galaxies for branon dark matter annihilation signatures with the MAGIC telescopes
Combined search in dwarf spheroidal galaxies for branon dark matter annihilation signatures with the MAGIC telescopes Open
Massive brane fluctuations, called branons, behave as weakly interacting massive particles, which is one of the most favored class of candidates to fulfill the role of the dark matter (DM), an elusive kind of matter beyond the Standard Mod…
View article: Insights from the first flaring activity of a high synchrotron peaked blazar with X-ray polarization and VHE gamma rays
Insights from the first flaring activity of a high synchrotron peaked blazar with X-ray polarization and VHE gamma rays Open
Context. 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 …
View article: Detection of RS Oph with LST-1 and modelling of its HE/VHE gamma-ray emission
Detection of RS Oph with LST-1 and modelling of its HE/VHE gamma-ray emission Open
Context. The recurrent nova RS Ophiuchi (RS Oph) underwent a thermonuclear eruption in August 2021. In this event, RS Oph was detected by the High Energy Stereoscopic System (H.E.S.S.), the Major Atmospheric Gamma Imaging Cherenkov (MAGIC)…
View article: Characterization of Markarian 421 during its most violent year: Multiwavelength variability and correlations
Characterization of Markarian 421 during its most violent year: Multiwavelength variability and correlations Open
Aims. Mrk 421 was in its most active state around early 2010, which led to the highest TeV gamma-ray flux ever recorded from any active galactic nuclei (AGN). We aim to characterize the multiwavelength behavior during this exceptional year…
View article: Time-dependent modelling of short-term variability in the TeV-blazar VER J0521+211 during the major flare in 2020
Time-dependent modelling of short-term variability in the TeV-blazar VER J0521+211 during the major flare in 2020 Open
The BL Lacertae object VER J0521+211 underwent a notable flaring episode in February 2020. A short-term monitoring campaign, led by the MAGIC (Major Atmospheric Gamma Imaging Cherenkov) collaboration, covering a wide energy range from radi…
View article: Cosmic-ray acceleration and escape from supernova remnant W44 as probed by Fermi-LAT and MAGIC
Cosmic-ray acceleration and escape from supernova remnant W44 as probed by Fermi-LAT and MAGIC Open
Context. The supernova remnant (SNR) W44 and its surroundings are a prime target for studying the acceleration of cosmic rays (CRs). Several previous studies established an extended gamma-ray emission that is set apart from the radio shell…
View article: Characterization of Markarian 421 during its most violent year: Multiwavelength variability and correlations
Characterization of Markarian 421 during its most violent year: Multiwavelength variability and correlations Open
Mrk 421 was in its most active state around early 2010, which led to the highest TeV gamma-ray flux ever recorded from any active galactic nuclei. We aim to characterize the multiwavelength behavior during this exceptional year for Mrk 421…
View article: AGILE observations of the ultra-luminous GRB 221009A
AGILE observations of the ultra-luminous GRB 221009A Open
The ultra-luminous, long-duration transient event GRB 221009A was detected by several observatories - as the most luminous gamma-ray burst ever observed - from radio to VHE gamma rays, up to tens of TeV. AGILE detected an extraordinary inc…
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: Cosmic-ray acceleration and escape from supernova remnant W44 as probed by <i>Fermi</i>-LAT and MAGIC
Cosmic-ray acceleration and escape from supernova remnant W44 as probed by <i>Fermi</i>-LAT and MAGIC Open
Context. The supernova remnant (SNR) W44 and its surroundings are a prime target for studying the acceleration of cosmic rays (CRs). Several previous studies established an extended gamma-ray emission that is set apart from the radio shell…
View article: Time-dependent modelling of short-term variability in the TeV-blazar VER J0521+211 during the major flare in 2020
Time-dependent modelling of short-term variability in the TeV-blazar VER J0521+211 during the major flare in 2020 Open
The BL Lacertae object VER J0521+211 underwent a notable flaring episode in February 2020. A short-term monitoring campaign, led by the MAGIC (Major Atmospheric Gamma Imaging Cherenkov) collaboration, covering a wide energy range from radi…
View article: A new method of reconstructing images of gamma-ray telescopes applied to the LST-1 of CTAO
A new method of reconstructing images of gamma-ray telescopes applied to the LST-1 of CTAO Open
Context . Imaging atmospheric Cherenkov telescopes (IACTs) are used to observe very high-energy photons from the ground. Gamma rays are indirectly detected through the Cherenkov light emitted by the air showers they induce. The new generat…