A.J. Castro-Tirado
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View article: Prospects for dark matter observations in dwarf spheroidal galaxies with the Cherenkov Telescope Array Observatory
Prospects for dark matter observations in dwarf spheroidal galaxies with the Cherenkov Telescope Array Observatory Open
The dwarf spheroidal galaxies (dSphs) orbiting the Milky Way are widely regarded as systems supported by velocity dispersion against self-gravity, and as prime targets for the search for indirect dark matter (DM) signatures in the GeV-to-T…
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: 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 <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: 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
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 and radio telescopes. These observations include…
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: 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>100GeV) have traditionally derived their scientific results through proprietary data and software. Data standardisation has become a prominent issue in this field both as a requi…
View article: Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array
Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array Open
Galaxy clusters are expected to be both dark matter (DM) reservoirs and storage rooms for the cosmic-ray protons (CRp) that accumulate along the cluster's formation history. Accordingly, they are excellent targets to search for signals of …
View article: Prospects for a survey of the galactic plane with the Cherenkov Telescope Array
Prospects for a survey of the galactic plane with the Cherenkov Telescope Array Open
Approximately one hundred sources of very-high-energy (VHE) gamma rays are known in the Milky Way, detected with a combination of targeted observations and surveys. A survey of the entire Galactic Plane in the energy range from a few tens …
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: 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: 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: 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: 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: Estudio tipológico de los observatorios astronómicos
Estudio tipológico de los observatorios astronómicos Open
El desarrollo de la astronomía como ciencia, de los sistemas constructivos y de la tecnología ha provocado una evolución no planificada de los observatorios astronómicos como edificios. Estos cambios se han consolidado mediante un proceso …