J. Herrera
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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: 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: EVALUACIÓN DE LA PRECISIÓN EN EL PRONÓSTICO DE LA INFLACIÓN EN BOLIVIA: RANDOM FOREST Y ÁRBOLES DE DECISIÓN VS. ARIMA
EVALUACIÓN DE LA PRECISIÓN EN EL PRONÓSTICO DE LA INFLACIÓN EN BOLIVIA: RANDOM FOREST Y ÁRBOLES DE DECISIÓN VS. ARIMA Open
Este estudio compara modelos de pronóstico del IPC en Bolivia, evaluando enfoques tradicionales y de aprendizaje automático para la predicción de inflación. Se aplicaron modelos de Árbol de Decisión, Árbol Podado, Random Forest y ARIMA, en…
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 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: 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: 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
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: 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 radio-…
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: 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: 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: Long term study of the blazar S5 0716+714: investigating a turbulent jet at all wavelengths
Long term study of the blazar S5 0716+714: investigating a turbulent jet at all wavelengths Open
The blazar S5 0716+714 is an intermediate BL Lacertae object remarkable for its variability in\nmany energy bands. It was discovered by MAGIC in the very-high-energy (VHE) gamma-ray\nrange in 2008. Later in 2015 an impressive electric vect…
View article: Gamma-ray Spectral Line emission search from Dark Matter Annihilation up to 100 TeV towards the Galactic Centre with MAGIC
Gamma-ray Spectral Line emission search from Dark Matter Annihilation up to 100 TeV towards the Galactic Centre with MAGIC Open
The detection of line-like TeV gamma-ray features configures as a smoking gun for the discovery of TeV-scale particle dark matter. We report the first search for dark matter spectral lines in the Galactic Centre region up to gamma-ray ener…
View article: Defining the data legacy of the MAGIC telescopes: adopting a standardised data format and open-source analysis tools
Defining the data legacy of the MAGIC telescopes: adopting a standardised data format and open-source analysis tools Open
Very-high-energy (VHE, $E > 100\\,{\\rm GeV}$) gamma-ray telescopes have traditionally conducted science with proprietary data and software. After two decades of operations, they have accumulated thousands of hours of observations whose fu…
View article: Multiwavelength characterization of two flaring blazars: insight into the emission region of intermediate-synchrotron-peaked BL Lacs
Multiwavelength characterization of two flaring blazars: insight into the emission region of intermediate-synchrotron-peaked BL Lacs Open
The blazars B2 1811+31 and GB6 J1058+2817 were found to be in flaring state during 2020 and\n2021, respectively. The high states of the sources were registered by the Fermi-LAT at energies\nbelow 100 GeV, triggering observations at higher …
View article: Multiwavelength study of GRB 201216C using the sub-TeV emission detected by MAGIC
Multiwavelength study of GRB 201216C using the sub-TeV emission detected by MAGIC Open
Recently, several gamma-ray bursts (GRBs) have been detected in the very-high-energy (VHE) gamma-ray energy range by ground-based gamma-ray experiments such as MAGIC, H.E.S.S., and LHASSO. For some GRBs, the VHE emission is consistent with…
View article: The MAGIC of VHE gamma-ray astronomy: 20 years, 200 peer-reviewed publications and beyond
The MAGIC of VHE gamma-ray astronomy: 20 years, 200 peer-reviewed publications and beyond Open
The instrumentation for gamma-ray astronomy has advanced tremendously during the last two decades. The study of the most violent environments in the Universe has opened a new window to understand the frontier of physics, exploring processe…
View article: Leptonic and lepto-hadronic time-dependent spectral modeling of VER J0521+211 during the large outburst of February-March 2020.
Leptonic and lepto-hadronic time-dependent spectral modeling of VER J0521+211 during the large outburst of February-March 2020. Open
The high-synchrotron-peaked blazar VER J0521+211 was discovered in 2009 by VERITAS and is located at an unknown distance. In February 2020, the VERITAS collaboration alerted the multi-messenger community of an ongoing flare from the source…
View article: Evidence of hadronic origin of the gamma-ray emission from the nova RS Oph by the MAGIC telescopes
Evidence of hadronic origin of the gamma-ray emission from the nova RS Oph by the MAGIC telescopes Open
RS Ophiuchi (RS Oph) is a symbiotic recurrent nova that shows eruptive events roughly every 15 years. On August 8th, 2021, RS Oph erupted with its latest outburst. This event was detected by a wide range of multi-wavelength (MWL) instrumen…
View article: A survey to evaluate diversity, equity and inclusion in large collaborations
A survey to evaluate diversity, equity and inclusion in large collaborations Open
In 2020, the MAGIC collaboration started an initiative to improve diversity, equity and inclusion (DEI) in the collaboration. One of the major actions undertaken by this initiative was a survey which was distributed among all MAGIC members…
View article: Multimessenger Characterization of Markarian 501 during Historically Low X-Ray and γ-Ray Activity
Multimessenger Characterization of Markarian 501 during Historically Low X-Ray and γ-Ray Activity Open
We study the broadband emission of Mrk 501 using multiwavelength observations from 2017 to 2020 performed with a multitude of instruments, involving, among others, MAGIC, Fermi's Large Area Telescope (LAT), NuSTAR, Swift, GASP-WEBT, and th…
View article: MAGIC observations provide compelling evidence of hadronic multi-TeV emission from the putative PeVatron SNR G106.3+2.7
MAGIC observations provide compelling evidence of hadronic multi-TeV emission from the putative PeVatron SNR G106.3+2.7 Open
Context. Certain types of supernova remnants (SNRs) in our Galaxy are assumed to be PeVatrons, capable of accelerating cosmic rays (CRs) to ~ PeV energies. However, conclusive observational evidence for this has not yet been found. The SNR…
View article: Long-term multi-wavelength study of 1ES 0647+250
Long-term multi-wavelength study of 1ES 0647+250 Open
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 detected with the MAGIC telescopes during a period of low activity…
View article: Gamma-ray observations of MAXI J1820+070 during the 2018 outburst
Gamma-ray observations of MAXI J1820+070 during the 2018 outburst Open
MAXI J1820+070 is a low-mass X-ray binary with a black hole as a compact object. This binary underwent an exceptionally bright X-ray outburst from March to October 2018, showing evidence of a non-thermal particle population through its rad…