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General
El Grupo de Astrofísica de Partículas del IAC participa activamente en tres grandes colaboraciones internacionales de astrofísica de muy altas energías: AMS-02 (Alpha Magnetic Spectrometer), los telescopios de radiación Cherenkov MAGIC I y II y el Cherenkov Telescope Array Observatory (CTAO). Además, participamos en el ASTRI mini-array, el experimento de rayos gamma Fermi-LAT y los telescopios ópticos de seguimiento de ondas gravitacionales GOTO.
AMS-02 es un detector de partículas diseñado para operar en el espacio, a bordo de la Estación Espacial Internacional (ISS). Se instaló con éxito en mayo de 2011, y se espera que opere durante toda la vida útil de la misma hasta al menos 2030. Su misión es realizar un estudio de alta precisión y estadística del espectro y la composición de los rayos cósmicos primarios en un amplio rango de energía, así como buscar antimateria primordial y materia oscura de forma indirecta.
La colaboración MAGIC está formada por 20 institutos y departamentos universitarios de Alemania, Armenia, Bulgaria, España, EEUU, Finlandia, Italia, Polonia y Suiza. La colaboración cuenta con dos telescopios de 17 m de diámetro localizados en el Obsevatorio del Roque de los Muchachos (ORM), diseñados para medir la radiación Cherenkov asociada a cascadas atmosféricas producidas por rayos gamma de muy alta energía y localizados en el Observatorio del Roque de los Muchachos.
En el marco de las observaciones de rayos gamma de muy alta energia, el IAC también participa en el consorcio internacional de la red de telescopios Cherenkov CTAO, cuyo objetivo es construir dos grandes complejos de observación en los hemisferios Norte y Sur. El Observatorio del Roque de los Muchachos en La Palma fue seleccionado para albergar el observatorio Norte de CTAO. El primer telescopio de 23 metros del tipo "Large Size Telescope" de CTAO, denominado LST1, fue inaugurado en el ORM en octubre de 2018. Este telescopio ha sido construido por el consorcio "LST Collaboration" de CTAO, que está integrado por 300 científicos de 12 países, donde el IAC tiene un papel muy relevante. Actualmente se está finalizando la puesta a punto del telescopio LST1 y la explotación científica de los datos ya está dando lugar a nuevos descubrimientos. El IAC está actualmente en fase de construcción de 3 telescopios de gran tamaño más (LST2-LST4) en el ORM.
El proyecto ASTRI mini-array está actualmente en construcción en el Observatorio del Teide. Consistirá en un total de 9 telescopios Cherenkov de pequeño tamaño, de los cuales el primero, ASTRI-1, está ya construido y en fase de comisionado.
Miembros
Resultados
Hitos del proyecto en 2024:
- Visión del cielo transitorio con rayos gamma de muy alta energía
- Estudio detallado de la emisión de muy alta energía del pulsar del cangrejo con el LST-1
- La convergencia cosmológica óptica: la luz de fondo extragaláctico de rayos gamma en el rango TeV
- Determinación de la anisotropía de partículas elementales con AMS en la Estación Espacial Internacional
- Estudio multi-longitud de onda de OT 081: modelado de banda ancha de un blazar de transición
- La puesta apunto del primer telescopio ASTRI-1 de la ASTRI mini-array en el observatorio del Teide ha comenzado
- La instalación de las estructuras mecánicas de los telescopios LST2-LST4 de CTAO en el Observatorio del Roque de los Muchachos está muy avanzada
Actividad científica
Publicaciones relacionadas
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A new method of reconstructing images of gamma-ray telescopes applied to the LST-1 of CTAOContext. 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 generation of experiments, in particular the Cherenkov Telescope Array Observatory (CTAO), sets ambitious goals forAbe, K. et al.
Fecha de publicación:
112024 -
Distance estimation of gamma-ray-emitting BL Lac objects from imaging observationsAims. The direct redshift determination of BL Lac objects is highly challenging as the emission in the optical and near-infrared bands is largely dominated by the non-thermal emission from the relativistic jet, which points very close to our line of sight. Therefore, the optical spectra of BL Lac objects often show no spectral lines from the hostNilsson, K. et al.
Fecha de publicación:
112024 -
Constraints on VHE gamma-ray emission of flat spectrum radio quasars with the MAGIC telescopesFlat 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 dust structure known as dusty torus. The intense radiation field of the accretion disc strongly determines theAbe, S. et al.
Fecha de publicación:
122024 -
Determination of the anisotropy of elementary particles with the Alpha Magnetic Spectrometer on the International Space StationA measurement of the cosmic ray anisotropy on the arrival directions of elementary particles (electrons, positrons and protons) has been performed in galactic coordinates by the Alpha Magnetic Spectrometer onboard the International Space Station. The analysis is based on the sample of events collected in the first 10 years of data taking. TheVelasco, Miguel Ángel et al.
Fecha de publicación:
112024 -
The Cosmological Optical Convergence: Extragalactic Background Light from TeV Gamma RaysThe intensity of the extragalactic background (EBL), the accumulated optical and infrared emissions since the first stars, is the subject of a decades-long tension in the optical band. These photons form a target field that attenuates the γ-ray flux from extragalactic sources. This Letter reports the first γ-ray measurement of the EBL spectrum at zGréaux, Lucas et al.
Fecha de publicación:
112024 -
Prospects for a survey of the galactic plane with the Cherenkov Telescope ArrayApproximately 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 of GeV to a few hundred TeV has been proposed as a Key Science Project for the upcoming Cherenkov TelescopeAbe, S. et al.
Fecha de publicación:
102024 -
Standardised formats and open-source analysis tools for the MAGIC telescopes dataInstruments for gamma-ray astronomy at Very High Energies ( E > 100 GeV) have traditionally derived their scientific results through proprietary data and software. Data standardisation has become a prominent issue in this field both as a requirement for the dissemination of data from the next generation of gamma-ray observatories and as anKluge, G. W. et al.
Fecha de publicación:
112024 -
A detailed study of the very high-energy Crab pulsar emission with the LST-1Context. To date, three pulsars have been firmly detected by imaging atmospheric Cherenkov telescopes (IACTs). Two of them reached the TeV energy range, challenging models of very high-energy (VHE) emission in pulsars. More precise observations are needed to better characterize pulsar emission at these energies. The LST-1 is the prototype of theAbe, K. et al.
Fecha de publicación:
102024 -
Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope ArrayGalaxy 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 DM annihilation and decay at γ-ray energies and are predicted to be sources of large-scale γ-ray emission dueAbe, K. et al.
Fecha de publicación:
102024 -
Dark matter line searches with the Cherenkov Telescope ArrayMonochromatic gamma-ray signals constitute a potential smoking gun signature for annihilating or decaying dark matter particles that could relatively easily be distinguished from astrophysical or instrumental backgrounds. We provide an updated assessment of the sensitivity of the Cherenkov Telescope Array (CTA) to such signals, based onAbe, S. et al.
Fecha de publicación:
72024 -
Constraints on Lorentz invariance violation from the extraordinary Mrk 421 flare of 2014 using a novel analysis methodThe 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 the massive QG energy scale E_QG, expected to be on the level of the Planck energy 1.22 × 10 19 GeV, isAbe, S. et al.
Fecha de publicación:
72024 -
Insights into the broadband emission of the TeV blazar Mrk 501 during the first X-ray polarization measurementsAims: 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-to-VHE data from a multiwavelength campaign carried out between March 1, 2022, and July 19, 2022 (MJD 59639 toMAGIC Collaboration et al.
Fecha de publicación:
52024 -
TeV pion bumps in the gamma-ray spectra of flaring blazarsContext. Very high-energy (VHE, E > 100 GeV) observations of the blazar Mrk 501 with MAGIC in 2014 provided evidence for an unusual narrow spectral feature at about 3 TeV during an extreme X-ray flaring activity. The one-zone synchrotron-self Compton scenario, widely used in blazar broadband spectral modeling, fails to explain the narrow TeVPetropoulou, M. et al.
Fecha de publicación:
52024 -
The variability patterns of the TeV blazar PG 1553 + 113 from a decade of MAGIC and multiband observationsPG 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 underlying physical processes driving its variability, the MAGIC Collaboration initiated a multiyear, multiwavelengthMAGIC Collaboration et al.
Fecha de publicación:
42024 -
A Very-High-Energy Gamma-Ray View of the Transient SkyThe development of the latest generation of Imaging Atmospheric Cherenkov Telescopes (IACTs) over recent decades has led to the discovery of new extreme astrophysical phenomena in the very-high-energy (VHE, E > 100 GeV) gamma-ray regime. Time-domain and multi-messenger astronomy are inevitably connected to the physics of transient VHE emittersCarosi, Alessandro et al.
Fecha de publicación:
32024 -
First characterization of the emission behavior of Mrk 421 from radio to very high-energy gamma rays with simultaneous X-ray polarization measurementsAims: 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 carried out between May and June 2022 using MAGIC, Fermi-LAT, NuSTAR, XMM-Newton, Swift, and several opticalAbe, S. et al.
Fecha de publicación:
42024 -
Performance and first measurements of the MAGIC stellar intensity interferometerIn 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 Intensity Interferometer), implemented to investigate the feasibility and potential of this technique on IACTs. AfterAbe, S. et al.
Fecha de publicación:
42024 -
Optical spectroscopy of blazars for the Cherenkov Telescope Array - IIIContext. Blazars, which include BL Lacs and flat-spectrum radio quasars, represent the brightest persistent extragalactic sources in the high-energy (HE; 10 MeV-100 GeV) and very-high-energy (VHE; E > 100 GeV) γ-ray sky. Due to their almost featureless optical/UV spectra, it is challenging to measure the redshifts of BL Lacs. As a result, about 50%D'Ammando, F. et al.
Fecha de publicación:
32024 -
Multiwavelength variability analysis of Fermi-LAT blazarsBlazars present highly variable gamma-ray emission. This variability, which can range from a few minutes to several years, is also observed at other wavelengths across the entire electromagnetic spectrum. We make use of the first 12 yr of data from the Fermi Large Area Telescope, complemented with multiwavelength (MWL) archival data from differentPeñil, P. et al.
Fecha de publicación:
42024 -
Multi-year characterisation of the broad-band emission from the intermittent extreme BL Lac 1ES 2344+514Aims: 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 ν synch, p above 1 keV. While those extreme states have only been observed during high flux levels thus far, additional multi-year observing campaigns are required to achieve a coherentMAGIC Collaboration et al.
Fecha de publicación:
22024
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