G. Busetto
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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: Constraints on VHE gamma-ray emission of flat spectrum radio quasars with the MAGIC telescopes
Constraints on VHE gamma-ray emission of flat spectrum radio quasars with the MAGIC telescopes Open
Flat spectrum radio quasars (FSRQs) constitute a class of jetted active galaxies characterized by a very luminous accretion disc, prominent and rapidly moving line-emitting cloud structures (broad-line region, BLR), and a surrounding dense…
View article: Standardised formats and open-source analysis tools for the MAGIC telescopes data
Standardised formats and open-source analysis tools for the MAGIC telescopes data Open
Instruments for gamma-ray astronomy at Very High Energies ($E>100\,{\rm GeV}$) have traditionally derived their scientific results through proprietary data and software. Data standardisation has become a prominent issue in this field both …
View article: Constraints on Lorentz invariance violation from the extraordinary Mrk 421 flare of 2014 using a novel analysis method
Constraints on Lorentz invariance violation from the extraordinary Mrk 421 flare of 2014 using a novel analysis method Open
The Lorentz Invariance Violation (LIV), a proposed consequence of certain quantum gravity (QG) scenarios, could instigate an energy-dependent group velocity for ultra-relativistic particles. This energy dependence, although suppressed by t…
View article: Performance and first measurements of the MAGIC stellar intensity interferometer
Performance and first measurements of the MAGIC stellar intensity interferometer Open
In recent years, a new generation of optical intensity interferometers has emerged, leveraging the existing infrastructure of Imaging Atmospheric Cherenkov Telescopes (IACTs). The MAGIC telescopes host the MAGIC-SII system (Stellar Intensi…
View article: Performance and first measurements of the MAGIC stellar intensity interferometer
Performance and first measurements of the MAGIC stellar intensity interferometer Open
In recent years, a new generation of optical intensity interferometers has emerged, leveraging the existing infrastructure of Imaging Atmospheric Cherenkov Telescopes (IACTs). The MAGIC telescopes host the MAGIC-SII system (Stellar Intensi…
View article: The variability patterns of the TeV blazar PG 1553 + 113 from a decade of MAGIC and multiband observations
The variability patterns of the TeV blazar PG 1553 + 113 from a decade of MAGIC and multiband observations Open
PG 1553 + 113 is one of the few blazars with a convincing quasi-periodic emission in the gamma-ray band. The source is also a very high energy (VHE; >100 GeV) gamma-ray emitter. To better understand its properties and identify the under…
View article: Insights into the broadband emission of the TeV blazar Mrk 501 during the first X-ray polarization measurements
Insights into the broadband emission of the TeV blazar Mrk 501 during the first X-ray polarization measurements Open
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 the Imaging X-ray Polarimetry Explorer (IXPE). Methods. We used radi…
View article: First characterization of the emission behavior of Mrk 421 from radio to very high-energy gamma rays with simultaneous X-ray polarization measurements
First characterization of the emission behavior of Mrk 421 from radio to very high-energy gamma rays with simultaneous X-ray polarization measurements Open
Aims. We have performed the first broadband study of Mrk 421 from radio to TeV gamma rays with simultaneous measurements of the X-ray polarization from IXPE. Methods. The data were collected as part of an extensive multiwavelength campaign…
View article: Insights into the broad-band emission of the TeV blazar Mrk 501 during the first X-ray polarization measurements
Insights into the broad-band emission of the TeV blazar Mrk 501 during the first X-ray polarization measurements Open
We present the first multi-wavelength study of Mrk 501 including very-high-energy (VHE) gamma-ray observations simultaneous to X-ray polarization measurements from the Imaging X-ray Polarimetry Explorer (IXPE). We use radio-to-VHE data fro…
View article: Constraints on axion-like particles with the Perseus Galaxy Cluster with MAGIC
Constraints on axion-like particles with the Perseus Galaxy Cluster with MAGIC Open
Axion-like particles (ALPs) are pseudo-Nambu-Goldstone bosons that emerge in various theories beyond the standard model. These particles can interact with high-energy photons in external magnetic fields, influencing the observed gamma-ray …
View article: First characterization of the emission behavior of Mrk421 from radio to VHE gamma rays with simultaneous X-ray polarization measurements
First characterization of the emission behavior of Mrk421 from radio to VHE gamma rays with simultaneous X-ray polarization measurements Open
We perform the first broadband study of Mrk421 from radio to TeV gamma rays with simultaneous measurements of the X-ray polarization from IXPE. The data were collected within an extensive multiwavelength campaign organized between May and …
View article: MAGIC detection of GRB 201216C at<i>z</i> = 1.1
MAGIC detection of GRB 201216C at<i>z</i> = 1.1 Open
Gamma-ray bursts (GRBs) are explosive transient events occurring at cosmological distances, releasing a large amount of energy as electromagnetic radiation over several energy bands. We report the detection of the long GRB 201216C by the M…
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 nu(synch.p) above 1 keV. While those extreme states have only been observed…
View article: Performance of the joint LST-1 and MAGIC observations evaluated with Crab Nebula data
Performance of the joint LST-1 and MAGIC observations evaluated with Crab Nebula data Open
Aims. Large-Sized Telescope 1 (LST-1), the prototype for the Large-Sized Telescope at the upcoming Cherenkov Telescope Array Observatory, is concluding its commissioning phase at the Observatorio del Roque de los Muchachos on the island of…
View article: Constraints to axion-like particles with the Perseus Galaxy Cluster with MAGIC
Constraints to axion-like particles with the Perseus Galaxy Cluster with MAGIC Open
Axion-like particles (ALPs) are pseudo-Nambu-Goldston bosons that appear in theories beyond the standard model and are capable of converting to photons in the presence of magnetic fields. Such interaction can have an observable effect on t…
View article: New constraints on Lorentz invariance violation using the extraordinary flare of Mrk 421 in 2014
New constraints on Lorentz invariance violation using the extraordinary flare of Mrk 421 in 2014 Open
An extraordinary flare from blazar Mrk 421 was recorded on the night of April 24, 2014, by the Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescopes at very high energy (VHE) from 100 GeV up to 10 TeV. Several quantum-gravity models…
View article: Simulation of PeV atmospheric showers for SWGO
Simulation of PeV atmospheric showers for SWGO Open
The recent discovery of PeV gamma-ray emission especially from the LHAASO observatory, located in the Northern hemisphere, boosted the relevance of observing the Southern sky at such
\nenergies. SWGO (SouthernWide-Field Gamma-Ray Observato…
View article: The Mercedes water Cherenkov detector: a multi-PMT shallow tank design proposal for ground-based gamma-ray observatories
The Mercedes water Cherenkov detector: a multi-PMT shallow tank design proposal for ground-based gamma-ray observatories Open
We present the concept of a shallow, single-layer, multi-PMT water Cherenkov detector (WCD) unit for ground-based gamma-ray astronomy. The design was developed as part of the R&D activities for SWGO, as a candidate WCD unit solution for th…
View article: Update on the performance of the MAGIC Intensity Interferometer
Update on the performance of the MAGIC Intensity Interferometer Open
In recent years, the MAGIC telescopes have been equipped with a setup that allows its Imaging Atmospheric Cherenkov Telescopes (IACTs) to function as an Intensity Interferometer. The deadtime-free setup includes a 4-channel GPU-based real-…
View article: $S_b$ for gamma/hadron separation in SWGO
$S_b$ for gamma/hadron separation in SWGO Open
The Southern Wide-field Gamma-ray Observatory (SWGO) is an international collaboration working on a ground-based gamma-ray observatory that will be located in the southern hemisphere. A crucial step in the analysis is to identify the showe…
View article: MAGIC Upper Limits on the VHE emission from Flat Spectrum Radio Quasars
MAGIC Upper Limits on the VHE emission from Flat Spectrum Radio Quasars Open
Blazars are a class of active galactic nuclei (AGN) where the relativistic jet is pointed towards the observer. They are powerful sources of non-thermal radiation from radio to Very high energy(VHE) gamma-rays. Flat Spectrum Radio Quasars …
View article: The broadband 3-year monitoring of the blazar 1ES1959+650: a SED analysis of the low state
The broadband 3-year monitoring of the blazar 1ES1959+650: a SED analysis of the low state Open
The Spectral Energy Distribution (SED) of blazars consists of two components. The low-energy\nbump is interpreted as synchrotron radiation from accelerated electrons, while the high-energy\none is produced via inverse Compton scattering of…
View article: Highlights of Galactic Science with the MAGIC telescopes
Highlights of Galactic Science with the MAGIC telescopes Open
There are several types of Galactic sources that can potentially accelerate charged particles up to GeV and TeV energies. These accelerated particles can produce Very High Energy (E>100 GeV) gamma-ray emission through different non-thermal…
View article: Estimating the potential of SWGO to measure the composition-dependent behaviour of the CR anisotropy
Estimating the potential of SWGO to measure the composition-dependent behaviour of the CR anisotropy Open
Current cosmic ray anisotropy experiments have shown a significant swing in both the direction and the amplitude of the dipole at energies around tens of TeV. Due to the charged nature of these particles, and the presence of magnetic field…
View article: An update on site search activities for SWGO
An update on site search activities for SWGO Open
The Southern Wide-field Gamma-ray Observatory (SWGO) is a project by scientists and engineers from 14 countries and 78 institutions to design and build the first wide-field, ground-based gamma-ray observatory in the Southern Hemisphere, wi…
View article: Dark Matter searches in Dwarf Galaxies with the Southern Wide-field Gamma-ray Observatory
Dark Matter searches in Dwarf Galaxies with the Southern Wide-field Gamma-ray Observatory Open
Dark matter is thought to make up most of the matter density of the Universe, yet its true nature remains uncertain. Among dark matter theories, Weakly Interacting Massive Particles (WIMPs) are a prominent candidate for dark matter because…