29 research outputs found

    ¿Quién es la mujer climatérica en el contexto actual? La relevancia del enfoque preventivo en salud mental

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    El climaterio se enmarca en la crisis de la edad media de la vida que en las mujeres implica la vivencia de múltiples cambios importantes en relación con la pareja y la sexualidad, los hijos ya crecidos, los padres mayores, la experiencia de ser abuela, el trabajo, la elaboración de nuevos proyectos de vida, entre otros. La intervención del psicólogo tanto en la prevención como en la promoción de salud mental en este período, se revela como una tarea de importancia creciente ante el elevado número de mujeres que transitan esta crisis vital por la mayor expectativa de vida. Se torna una responsabilidad social ya que en los programas gubernamentales de prevención no aparecen de modo específico estrategias dirigidas hacia la mujer con esta problemática. En función de ello, y como intento de favorecer el conocimiento de las características particulares de esta etapa en las mujeres de la ciudad de San Luis, se elaboró el Proyecto de Extensión “Abordaje psicológico de mujeres climatéricas desde dos enfoques: preventivo y asistencial”. El marco conceptual está constituido por las conclusiones alcanzadas por este equipo, a partir del estudio de esta problemática en Proyectos de Investigación desde el año 2006 hasta la actualidad, en la Universidad Nacional de San Luis. En esta comunicación, se realiza un relato de las actividades realizadas para brindar información y contribuir a la toma de conciencia sobre la importancia del cuidado de la salud, tanto física como mental, en este período. Las estrategias de intervención implementadas por los integrantes, estudiantes y graduados, incluyen la difusión masiva de la temática a través de folletería y afiches en centros médicos públicos y privados, escuelas, así como en la vía pública en distintos sectores de la ciudad. Por otra parte, esta tarea de divulgación se realiza mediante la participación en programas radiales y televisivos, con la finalidad de lograr una mayor visibilización de la vulnerabilidad de la mujer en esta etapa. Además, se llevan a cabo charlas y talleres en Hospitales de mediana complejidad y en lugares céntricos de la ciudad de San Luis. Se espera estimular en la comunidad el desarrollo de actitudes de respeto y comprensión hacia las mujeres climatéricas, con el fin de favorecer el análisis crítico de los mitos y prejuicios que circulan en nuestra cultura sobre esta crisis vital. Asimismo, se pretende promover que ellas reconozcan sus propias dificultades, conflictos y potencialidades en relación a este período

    Southern African Large Telescope Spectroscopy of BL Lacs for the CTA project

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    In the last two decades, very-high-energy gamma-ray astronomy has reached maturity: over 200 sources have been detected, both Galactic and extragalactic, by ground-based experiments. At present, Active Galactic Nuclei (AGN) make up about 40% of the more than 200 sources detected at very high energies with ground-based telescopes, the majority of which are blazars, i.e. their jets are closely aligned with the line of sight to Earth and three quarters of which are classified as high-frequency peaked BL Lac objects. One challenge to studies of the cosmological evolution of BL Lacs is the difficulty of obtaining redshifts from their nearly featureless, continuum-dominated spectra. It is expected that a significant fraction of the AGN to be detected with the future Cherenkov Telescope Array (CTA) observatory will have no spectroscopic redshifts, compromising the reliability of BL Lac population studies, particularly of their cosmic evolution. We started an effort in 2019 to measure the redshifts of a large fraction of the AGN that are likely to be detected with CTA, using the Southern African Large Telescope (SALT). In this contribution, we present two results from an on-going SALT program focused on the determination of BL Lac object redshifts that will be relevant for the CTA observatory

    Monte Carlo studies for the optimisation of the Cherenkov Telescope Array layout

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    The Cherenkov Telescope Array (CTA) is the major next-generation observatory for ground-based very-high-energy gamma-ray astronomy. It will improve the sensitivity of current ground-based instruments by a factor of five to twenty, depending on the energy, greatly improving both their angular and energy resolutions over four decades in energy (from 20 GeV to 300 TeV). This achievement will be possible by using tens of imaging Cherenkov telescopes of three successive sizes. They will be arranged into two arrays, one per hemisphere, located on the La Palma island (Spain) and in Paranal (Chile). We present here the optimised and final telescope arrays for both CTA sites, as well as their foreseen performance, resulting from the analysis of three different large-scale Monte Carlo productions

    Cherenkov Telescope Array Contributions to the 35th International Cosmic Ray Conference (ICRC2017)

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    List of contributions from the Cherenkov Telescope Array Consortium presented at the 35th International Cosmic Ray Conference, July 12-20 2017, Busan, Korea.Comment: Index of Cherenkov Telescope Array conference proceedings at the ICRC2017, Busan, Kore

    CTA – the World’s largest ground-based gamma-ray observatory

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    Searching for very-high-energy electromagnetic counterparts to gravitational-wave events with the Cherenkov Telescope Array

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    The detection of electromagnetic (EM) emission following the gravitational wave (GW) event GW170817 opened the era of multi-messenger astronomy with GWs and provided the first direct evidence that at least a fraction of binary neutron star (BNS) mergers are progenitors of short Gamma-Ray Bursts (GRBs). GRBs are also expected to emit very-high energy (VHE, > 100 GeV) photons, as proven by the recent MAGIC and H.E.S.S. observations. One of the challenges for future multi-messenger observations will be the detection of such VHE emission from GRBs in association with GWs. In the next years, the Cherenkov Telescope Array (CTA) will be a key instrument for the EM follow-up of GW events in the VHE range, owing to its unprecedented sensitivity, rapid response, and capability to monitor a large sky area via scan-mode operation. We present the CTA GW follow-up program, with a focus on the searches for short GRBs possibly associated with BNS mergers. We investigate the possible observational strategies and we outline the prospects for the detection of VHE EM counterparts to transient GW events

    Sensitivity of the Cherenkov Telescope Array to emission from the gamma-ray counterparts of neutrino events

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    We investigate the possibility of detection of the VHE gamma-ray counterparts to the neutrino astrophysical sources within the Neutrino Target of Opportunity (NToO) program of CTA using the populations simulated by the FIRESONG software to resemble the diffuse astrophysical neutrino flux measured by IceCube. We derive the detection probability for different zenith angles and geomagnetic field configurations. The difference in detectability of sources between CTA-North and CTA-South for the average geomagnetic field is not substantial. We investigate the effect of a higher night-sky background and the preliminary CTA Alpha layout on the detection probability

    Monte Carlo Simulations and Validation of NectarCAM, a Medium Sized Telescope Camera for CTA

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    The upcoming Cherenkov Telescope Array (CTA) ground-based gamma-ray observatory will open up our view of the very high energy Universe, offering an improvement in sensitivity of 5-10 times that of previous experiments. NectarCAM is one of the proposed cameras for the Medium-Sized Telescopes (MST) which have been designed to cover the core energy range of CTA, from 100 GeV to 10 TeV. The final camera will be capable of GHz sampling and provide a field of view of 8 degrees with its 265 modules of 7 photomultiplier each (for a total of 1855 pixels). In order to validate the performance of NectarCAM, a partially-equipped prototype has been constructed consisting of only the inner 61-modules. It has so far undergone testing at the integration test-bench facility in CEA Paris-Saclay (France) and on a prototype of the MST structure in Adlershof (Germany). To characterize the performance of the prototype, Monte Carlo simulations were conducted using a detailed model of the 61 module camera in the CORSIKA/sim_telarray framework. This contribution provides an overview of this work including the comparison of trigger and readout performance on test-bench data and trigger and image parameterization performance during on-sky measurements

    Sensitivity of CTA to gamma-ray emission from the Perseus galaxy cluster

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    In these proceedings we summarize the current status of the study of the sensitivity of the Cherenkov Telescope Array (CTA) to detect diffuse gamma-ray emission from the Perseus galaxy cluster. Gamma-ray emission is expected in galaxy clusters both from interactions of cosmic rays (CR) with the intra-cluster medium, or as a product of annihilation or decay of dark matter (DM) particles in case they are weakly interactive massive particles (WIMPs). The observation of Perseus constitutes one of the Key Science Projects to be carried out by the CTA Consortium. In this contribution, we focus on the DM-induced component of the flux. Our DM modelling includes the substructures we expect in the main halo which will boost the annihilation signal significantly. We adopt an ON/OFF observation strategy and simulate the expected gamma-ray signals. Finally we compute the expected CTA sensitivity using a likelihood maximization analysis including the most recent CTA instrument response functions. In absence of signal, we show that CTA will allow us to provide stringent and competitive constraints on TeV DM, especially for the case of DM decay

    The Cherenkov Telescope Array: layout, design and performance

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    The Cherenkov Telescope Array (CTA) will be the next generation very-high-energy gamma-ray observatory. CTA is expected to provide substantial improvement in accuracy and sensitivity with respect to existing instruments thanks to a tenfold increase in the number of telescopes and their state-of-the-art design. Detailed Monte Carlo simulations are used to further optimise the number of telescopes and the array layout, and to estimate the observatory performance using updated models of the selected telescope designs. These studies are presented in this contribution for the two CTA stations located on the island of La Palma (Spain) and near Paranal (Chile) and for different operation and observation conditions
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