Person: Morcuende Parrilla, Daniel
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First Name
Daniel
Last Name
Morcuende Parrilla
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Físicas
Department
Estructura de la Materia, Física Térmica y Electrónica
Area
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7 results
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Now showing 1 - 7 of 7
Item Study of the performance of the first Large-Sized Cherenkov telescope of CTA, the relevance of fluorescence in the Cherenkov technique and the multiwavelength emission from the blazar 1ES 0647+250(2024) Morcuende Parrilla, Daniel; Rosado Vélez, Jaime; Contreras González, José Luis; Benbow, WystanEsta tesis se enmarca en un contexto a caballo entre dos generaciones de telescopios Cherenkov terrestres de rayos gamma de muy alta energía. Los instrumentos actuales, en operación desde hace unos 15 años, se encuentran en un estado de gran madurez tanto operacionalmente como en términos de explotación científica. Los telescopios prototipos de la nueva generación que conformara el observatorio Cherenkov Telescope Array (CTA) se han construido recientemente y actualmente se encuentran en fase de puesta a punto, comenzando incluso a producir resultados científicos...Item The relevance of fluorescence radiation in Cherenkov telescopes(Journal of physics: Conference series, 2019) Arqueros Martínez, Fernando; Rosado Vélez, Jaime; Morcuende Parrilla, Daniel; Contreras González, José LuisCherenkov telescopes are also sensitive to the atmospheric fluorescence produced by the extensive air showers. However this contribution is neglected by the reconstruction algorithms of imaging air Cherenkov telescopes IACTs and wide-angle Cherenkov detectors WACDs. In this paper we evaluate the fluorescence contamination in the Cherenkov signals from MC simulations in both kinds of Cherenkov telescopes and for some typical observational situations. Results for an observation level of 2200 m a.s.l. are shown. In addition, the feasibility and capabilities of IACTs working as fluorescence telescopes are discussed with the assistance of some geometrical calculations.Item Performance of the joint LST-1 and MAGIC observations evaluated with Crab Nebula data(Astronomy & Astrophysics, 2023) Abe, Ko; Barrio Uña, Juan Abel; Cifuentes Alejandro; Contreras González, José Luis; Láinez Lezáun, María; López Moya, Marcos; Martínez, Oibar; Más-Aguilar, Alvaro; Miener, Tjark; Miranda Pantoja, José Miguel; Morcuende Parrilla, Daniel; Moya, Victor; Polo, Miguel; Zywucka, NataliaAims. 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 La Palma. The proximity of LST-1 to the two MAGIC (Major Atmospheric Gamma Imaging Cherenkov) telescopes makes it possible to carry out observations of the same gamma-ray events with both systems. Methods. We describe the joint LST-1+MAGIC analysis pipeline and used simultaneous Crab Nebula observations and Monte Carlo simulations to assess the performance of the three-telescope system. The addition of the LST-1 telescope allows for the recovery of events in which one of the MAGIC images is too dim to survive analysis quality cuts. Results. Thanks to the resulting increase in the collection area and stronger background rejection, we found a significant improvement in sensitivity, allowing for the detection of 30% weaker fluxes in the energy range between 200 GeV and 3 TeV. The spectrum of the Crab Nebula, reconstructed in the energy range between ∼60 GeV and ∼10 TeV, is in agreement with previous measurements.Item Sensitivity of the Cherenkov Telescope Array to a dark matter signal from the Galactic centre(Journal of cosmology and astroparticle physics, 2021) Arqueros Martínez, Fernando; Baquero Larriva, Orlando Andrés; Barrio Uña, Juan Abel; Contreras González, José Luis; Domínguez Díaz, Alberto; López Moya, Marcos; Miener, Tjark; Morcuende Parrilla, Daniel; Nieto Castaño, Daniel; Rosado Vélez, Jaime; Tejedor Álvarez, Luis Ángel; otros, ...We provide an updated assessment of the power of the Cherenkov Telescope Array (CTA) to search for thermally produced dark matter at the TeV scale, via the associated gamma-ray signal from pair-annihilating dark matter particles in the region around the Galactic centre. We find that CTA will open a new window of discovery potential, significantly extending the range of robustly testable models given a standard cuspy profile of the dark matter density distribution. Importantly, even for a cored profile, the projected sensitivity of CTA will be sufficient to probe various well-motivated models of thermally produced dark matter at the TeV scale. This is due to CTA's unprecedented sensitivity, angular and energy resolutions, and the planned observational strategy. The survey of the inner Galaxy will cover a much larger region than corresponding previous observational campaigns with imaging atmospheric Cherenkov telescopes. CTA will map with unprecedented precision the large-scale diffuse emission in high-energy gamma rays, constituting a background for dark matter searches for which we adopt state-of-the-art models based on current data. Throughout our analysis, we use up-to-date event reconstruction Monte Carlo tools developed by the CTA consortium, and pay special attention to quantifying the level of instrumental systematic uncertainties, as well as background template systematic errors, required to probe thermally produced dark matter at these energies.Item Constraints on gamma-ray and neutrino emission from NGC 1068 with the MAGIC Telescopes(The Astrophysical Journal, 2019) Acciari, V. A.; López Coto, R; Morcuende Parrilla, Daniel; Rephaeli, Y.; Barrio Uña, Juan Abel; Contreras González, José Luis; Fonseca González, María Victoria; López Moya, Marcos; Peñil Del Campo, Pablo; ... otrosStarburst galaxies and star-forming active galactic nuclei are among the candidate sources thought to contribute appreciably to the extragalactic gamma-ray and neutrino backgrounds. NGC 1068 is the brightest of the star-forming galaxies found to emit gamma-rays from 0.1 to 50 GeV. Precise measurements of the high-energy spectrum are crucial to study the particle accelerators and probe the dominant emission mechanisms. We have carried out 125 hr of observations of NGC 1068 with the MAGIC telescopes in order to search for gamma-ray emission in the very- high-energy band. We did not detect significant gamma-ray emission, and set upper limits at the 95% confidence level to the gamma-ray flux above 200 GeV f < 5.1 × 10^(−13) cm^(−2) s^(−1). This limit improves previous constraints by about an order of magnitude and allows us to put tight constraints on the theoretical models for the gamma-ray emission. By combining the MAGIC observations with the Fermi-LAT spectrum we limit the parameter space (spectral slope, maximum energy) of the cosmic ray protons predicted by hadronuclear models for the gamma-ray emission, while we find that a model postulating leptonic emission from a semi-relativistic jet is fully consistent with the limits. We provide predictions for IceCube detection of the neutrino signal foreseen in the hadronic scenario. We predict a maximal IceCube neutrino event rate of 0.07 yr^(−1).Item Teraelectronvolt emission from the γ-ray burst GRB 190114C(2019) Acciari, Victor; Barrio Uña, Juan Abel; González Barrio, Miguel Ángel; Contreras González, José Luis; Fonseca González, María Victoria; López Moya, Marcos; Morcuende Parrilla, Daniel; Peñil Del Campo, Pablo; Nava, LaraLong-duration gamma-ray bursts (GRBs) are the most luminous sources of electromagnetic radiation known in the Universe. They arise from outflows of plasma with velocities near the speed of light that are ejected by newly formed neutron stars or black holes (of stellar mass) at cosmological distances(1,2). Prompt flashes of megaelectronvoltenergy gamma-rays are followed by a longer-lasting afterglow emission in a wide range of energies (from radio waves to gigaelectronvolt gamma-rays), which originates from synchrotron radiation generated by energetic electrons in the accompanying shock waves(3,4). Although emission of gamma-rays at even higher (teraelectronvolt) energies by other radiation mechanisms has been theoretically predicted(5-8), it has not been previously detected(7,8). Here we report observations of teraelectronvolt emission from the gamma-ray burst GRB 190114C. gamma-rays were observed in the energy range 0.2-1 teraelectronvolt from about one minute after the burst (at more than 50 standard deviations in the first 20 minutes), revealing a distinct emission component of the afterglow with power comparable to that of the synchrotron component. The observed similarity in the radiated power and temporal behaviour of the teraelectronvolt and X-ray bands points to processes such as inverse Compton upscattering as the mechanism of the teraelectronvolt emission(9-11). By contrast, processes such as synchrotron emission by ultrahigh-energy protons(10,12,13) are not favoured because of their low radiative efficiency. These results are anticipated to be a step towards a deeper understanding of the physics of GRBs and relativistic shock waves.Item Sensitivity of the Cherenkov Telescope Array for probing cosmology and fundamental physics with gamma-ray propagation(Journal of cosmology and astroparticle physics, 2021) Arqueros Martínez, Fernando; Baquero Larriva, Orlando Andrés; Barrio Uña, Juan Abel; Contreras González, José Luis; Domínguez, A.; Fonseca González, Mª Victoria; López Moya, Marcos; Miener, Tjark; Morcuende Parrilla, Daniel; Nieto, D.; Rosado Vélez, Jaime; Saha, Lab; Tejedor Álvarez, Luis Ángel; otros, ...The Cherenkov Telescope Array (CTA), the new-generation ground-based observatory for gamma-ray astronomy, provides unique capabilities to address significant open questions in astrophysics, cosmology, and fundamental physics. We study some of the salient areas of gamma-ray cosmology that can be explored as part of the Key Science Projects of CTA, through simulated observations of active galactic nuclei (AGN) and of their relativistic jets. Observations of AGN with CTA will enable a measurement of gamma-ray absorption on the extragalactic background light with a statistical uncertainty below 15% up to a redshift z = 2 and to constrain or detect gamma-ray halos up to intergalactic-magnetic-field strengths of at least 0.3 pG. Extragalactic observations with CTA also show promising potential to probe physics beyond the Standard Model. The best limits on Lorentz invariance violation from gamma-ray astronomy will be improved by a factor of at least two to three. CTA will also probe the parameter space in which axion-like particles could constitute a significant fraction, if not all, of dark matter. We conclude on the synergies between CTA and other upcoming facilities that will foster the growth of gamma-ray cosmology.