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5 results on '"Campos, S. M."'

1. Searching for Dark Matter with the Southern Wide-field Gamma-ray Observatory (SWGO)

Author

Viana, A., Albert, A., Harding, J. P., Hinton, J., Schoorlemmer, H., Souza, V., Abreu, P., Angüner, E. O., Arcaro, C., Arnaldi, L. H., Arteaga-Velázquez, J. C., Assis, P., Bakalová, A., Almeida, U. B., Batković, I., Bellido, J., Belmont-Moreno, E., Bisconti, F., Blanco, A., Bohacova, M., Bottacini, E., Bretz, T., Brisbois, C., Brogueira, P., Brown, A. M., Bulik, T., Mora, K. S. C., Campos, S. M., Chiavassa, A., Chytka, L., Ruben Conceição, Consolati, G., Paleta, J. C., Dasso, S., Angelis, A., Bom, C. R., La Fuente, E., Depaoli, D., Di Sciascio, G., Dib, C. O., Dorner, D., Doro, M., Du Vernois, M., Ergin, T., Fan, K. L., Fraija, N., Funk, S., García, J. I., García-González, J. A., García Roca, S. T., Giacinti, G., Goksu, H., González, B. S., Guarino, F., Guillén, A., Haist, F., Hansen, P. M., Hofmann, W., Hona, B., Hoyos, D., Huentemeyer, P., Hueyotl-Zahuantitla, F., Insolia, A., Janecek, P., Joshi, V., Khelifi, B., Kunwar, S., La Mura, G., Lapington, J., Laspiur, M. R., Leitl, F., Longo, F., Lopes, L., Lopez-Coto, R., Mandat, D., Mariazzi, A. G., Mariotti, M., Marques Moraes, A., Martínez-Castro, J., Martínez-Huerta, H., May, S., Melo, D. G., Mendes, L. F., Mendes, L. M., Mineeva, T., Mitchell, A., Mohan, S., Morales Olivares, O. G., Moreno-Barbosa, E., Nellen, L., Novotny, V., Olivera-Nieto, L., Orlando, E., Pech, M., Pichel, A., Pimenta, M., Albuquerque, M. P., Prandini, E., Rado Cuchills, M. S., Reisenegger, A., Reville, B., Rho, C. D., Rovero, A. C., Ruiz-Velasco, E., Salazar, G. A., Sandoval, A., Santander, M., Schüssler, F., Serrano, V. H., Shellard, R. C., Sinha, A., Smith, A. J., Surajbali, P., Tomé, B., Torres Aguilar, I., Eldik, C., Vergara-Quispe, I. D., Vícha, J., Vigorito, C. F., Wang, X., Werner, F., White, R., and Zamalloa Jara, M. A.

Subjects
Physics, Annihilation, Astrophysics::High Energy Astrophysical Phenomena, Galactic Center, Dark matter, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Galactic halo, SWGO - Abteilung Hinton, Observatory, Weakly interacting massive particles, Large Magellanic Cloud, Astrophysics::Galaxy Astrophysics, Dwarf galaxy
Abstract

Despite mounting evidence that dark matter (DM) exists in the Universe, its fundamental nature remains unknown. We present sensitivity estimates to detect DM particles with a future very-high-energy ($\gtrsim$ TeV) wide field-of-view gamma-ray observatory in the Southern Hemisphere, currently in its research and development phase under the name Southern Wide field-of-view Gamma-ray Observatory (SWGO). This observatory would search for gamma rays from the annihilation or decay of DM particles in many key targets in the Southern sky, such as the Galactic halo, several dwarf galaxies, including the promising Reticulum II, and the Large Magellanic Cloud. With a wide field of view and long exposures, such observatory will have unprecedented sensitivity to DM in the mass range of $\sim$100 GeV to a few PeV from observations of a large fraction of the Galactic halo around the Galactic Center and from Galactic subhalos targets. These results, combined with those from other present and future gamma-ray observatories, will likely probe the thermal relic annihilation cross section of Weakly Interacting Massive Particles for all masses from $\sim$80 TeV down to the GeV range in most annihilation channels.

Published
2022

2. Monitoring Gamma-Ray Burst VHE emission with the Southern Wide-field-of-view Gamma-ray Observatory

Author

La Mura, G., Abreu, P., Albert, A., Angüner, E. O., Arcaro, C., Arnaldi, L. H., Arteaga-Velázquez, J. C., Assis, P., Bakalová, A., Barres Almeida, U., Batković, I., Bellido, J., Belmont-Moreno, E., Bisconti, F., Blanco, A., Bohacova, M., Bottacini, E., Bretz, T., Brisbois, C., Brogueira, P., Brown, A. M., Bulik, T., Caballero Mora, K. S., Campos, S. M., Chiavassa, A., Chytka, L., Conceição, R., Consolati, G., Cotzomi Paleta, J., Dasso, S., Angelis, A., Bom, C. R., La Fuente, E., Souza, V., Depaoli, D., Di Sciascio, G., Dib, C. O., Dorner, D., Doro, M., Du Vernois, M., Ergin, T., Fan, K. L., Fraija, N., Funk, S., García, J. I., García-González, J. A., García Roca, S. T., Giacinti, G., Goksu, H., González, B. S., Guarino, F., Guillén, A., Haist, F., Hansen, P. M., Harding, J. P., Hinton, J., Hofmann, W., Hona, B., Hoyos, D., Huentemeyer, P., Hueyotl-Zahuantitla, F., Insolia, A., Janecek, P., Joshi, V., Khelifi, B., Samridha Kunwar, Lapington, J., Laspiur, M. R., Leitl, F., Longo, F., Lopes, L., Lopez-Coto, R., Mandat, D., Mariazzi, A. G., Mariotti, M., Marques Moraes, A., Martínez-Castro, J., Martínez-Huerta, H., May, S., Melo, D. G., Mendes, L. F., Mendes, L. M., Mineeva, T., Mitchell, A., Mohan, S., Morales Olivares, O. G., Moreno-Barbosa, E., Nellen, L., Novotny, V., Olivera-Nieto, L., Orlando, E., Pech, M., Pichel, A., Pimenta, M., Portes Albuquerque, M., Prandini, E., Rado Cuchills, M. S., Reisenegger, A., Reville, B., Rho, C. D., Rovero, A. C., Ruiz-Velasco, E., Salazar, G. A., Sandoval, A., Santander, M., Schoorlemmer, H., Schüssler, F., Serrano, V. H., Shellard, R. C., Sinha, A., Smith, A. J., Surajbali, P., Tomé, B., Torres Aguilar, I., Eldik, C., Vergara-Quispe, I. D., Viana, A., Vícha, J., Vigorito, C. F., Wang, X., Werner, F., White, R., and Zamalloa Jara, M. A.

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Observatory, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics, Gamma-ray burst, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Wide field, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

It has been established that Gamma-Ray Bursts (GRB) can produce Very High Energy radiation (E > 100 GeV), opening a new window on the investigation of particle acceleration and radiation properties in the most energetic domain. We expect that next-generation instruments, such as the Cherenkov Telescope Array (CTA), will mark a huge improvement in their observation. However, constraints on the target visibility and the limited duty cycle of Imaging Atmospheric Cherenkov Telescopes (IACT) reduce their ability to react promptly to transient events and to characterise their general properties. Here we show that an instrument based on the Extensive Air Shower (EAS) array concept, proposed by the Southern Wide Field-of-view Gamma-ray Observatory (SWGO) Collaboration, has promising possibilities to detect and track VHE emission from GRBs. Observations made by the Fermi Large Area Telescope (Fermi-LAT) identified some events with a distinct spectral component, extending above $1\,$GeV or even $10\,$GeV, which can represent a substantial fraction of the emitted energy and also arise in early stages of the process. Using models based on these properties, we estimate the possibilities that a wide field of view and large effective area ground-based monitoring facility has to probe VHE emission from GRBs. We show that the ability to monitor VHE transients with a nearly continuous scanning of the sky grants an opportunity to access simultaneous electromagnetic counterparts to Multi-Messenger triggers up to cosmological scales, in a way that is not available to IACTs., Proceedings of the 37th International Cosmic-Ray Conference. Accepted by PoS

Published
2021

3. Double-layered Water Cherenkov Detector for SWGO

Author

Samridha Kunwar, Abreu, P., Albert, A., Angüner, E. O., Arcaro, C., Arnaldi, L. H., Arteaga-Velázquez, J. C., Assis, P., Bakalová, A., Almeida, U. B., Batković, I., Bellido, J., Belmont-Moreno, E., Bisconti, F., Blanco, A., Bohacova, M., Bottacini, E., Bretz, T., Brisbois, C., Brogueira, P., Brown, A. M., Bulik, T., Mora, K. S. C., Campos, S. M., Chiavassa, A., Chytka, L., Conceição, R., Consolati, G., Paleta, J. C., Dasso, S., Angelis, A., Bom, C. R., La Fuente, E., Souza, V., Depaoli, D., Di Sciascio, G., Dib, C. O., Dorner, D., Doro, M., Du Vernois, M., Ergin, T., Fan, K. L., Fraija, N., Funk, S., García, J. I., García-González, J. A., Roca, S. T. G., Giacinti, G., Goksu, H., González, B. S., Guarino, F., Guillén, A., Haist, F., Hansen, P. M., Harding, J. P., Hinton, J., Hofmann, W., Hona, B., Hoyos, D., Huentemeyer, P., Hueyotl-Zahuantitla, F., Insolia, A., Janecek, P., Joshi, V., Khelifi, B., La Mura, G., Lapington, J., Laspiur, M. R., Leitl, F., Longo, F., Lopes, L., Lopez-Coto, R., Mandat, D., Mariazzi, A. G., Mariotti, M., Moraes, A. M., Martínez-Castro, J., Martínez-Huerta, H., May, S., Melo, D. G., Mendes, L. F., Mendes, L. M., Mineeva, T., Mitchell, A., Mohan, S., Olivares, O. G. M., Moreno-Barbosa, E., Nellen, L., Novotny, V., Olivera-Nieto, L., Orlando, E., Pech, M., Pichel, A., Pimenta, M., Albuquerque, M. P., Prandini, E., Cuchills, M. S. R., Reisenegger, A., Reville, B., Rho, C. D., Rovero, A. C., Ruiz-Velasco, E., Salazar, G. A., Sandoval, A., Santander, M., Schoorlemmer, H., Schüssler, F., Serrano, V. H., Shellard, R. C., Sinha, A., Smith, A. J., Surajbali, P., Tomé, B., Aguilar, I. T., Eldik, C., Vergara-Quispe, I. D., Viana, A., Vícha, J., Vigorito, C. F., Wang, X., Werner, F., White, R., and Jara, M. A. Z.

Subjects
Physics, Muon, Physics::Instrumentation and Detectors, business.industry, Cherenkov detector, Astrophysics::High Energy Astrophysical Phenomena, Detector, Photodetector, Aspect ratio (image), law.invention, Optics, SWGO - Abteilung Hinton, law, Observatory, High Energy Physics::Experiment, business, Sensitivity (electronics), Cherenkov radiation
Abstract

The Southern Wide-field Gamma-ray Observatory (SWGO) will use the well-established and cost-effective technique of detecting Cherenkov light produced in water-filled detection units for TeV gamma-ray astronomy. Leveraging detector material reflectivity together with an optimised aspect ratio is an option to improve the performance of an array of such detector units. The double-layered Water Cherenkov Detector units comprise chambers with single photosensors in each. A reflective upper compartment enhances sensitivity to impinging secondary particles. A shallow lower compartment enables muon tagging and consequently improves the gamma hadron separation power of the observatory. Here we present detailed studies on the double-layered unit design.

Published
2021

4. Galactic Science with the Southern Wide-field Gamma-ray Observatory

Author

Abreu, P., Albert, A., Angüner, E. O., Arcaro, C., Arnaldi, L. H., Arteaga-Velázquez, J. C., Assis, P., Bakalová, A., Almeida, U. B., Batković, I., Bellido, J., Belmont-Moreno, E., Bisconti, F., Blanco, A., Bohacova, M., Bottacini, E., Bretz, T., Brisbois, C., Brogueira, P., Brown, A. M., Bulik, T., Caballero Mora, K. S., Campos, S. M., Chiavassa, A., Chytka, L., Ruben Conceição, Consolati, G., Cotzomi Paleta, J., Dasso, S., Angelis, A., Bom, C. R., La Fuente, E., Souza, V., Depaoli, D., Di Sciascio, G., Dib, C. O., Dorner, D., Doro, M., Du Vernois, M., Ergin, T., Fan, K. L., Fraija, N., Funk, S., García, J. I., García-González, J. A., García Roca, S. T., Giacinti, G., Goksu, H., González, B. S., Guarino, F., Guillén, A., Haist, F., Hansen, P. M., Harding, J. P., Hinton, J., Hofmann, W., Hona, B., Hoyos, D., Huentemeyer, P., Hueyotl-Zahuantitla, F., Insolia, A., Janecek, P., Joshi, V., Khelifi, B., Kunwar, S., La Mura, G., Lapington, J., Laspiur, M. R., Leitl, F., Longo, F., Lopes, L., Lopez-Coto, R., Mandat, D., Mariazzi, A. G., Mariotti, M., Marques Moraes, A., Martínez-Castro, J., Martínez-Huerta, H., May, S., Melo, D. G., Mendes, L. F., Mendes, L. M., Mineeva, T., Mitchell, A., Mohan, S., Morales Olivares, O. G., Moreno-Barbosa, E., Nellen, L., Novotny, V., Olivera-Nieto, L., Orlando, E., Pech, M., Pichel, A., Pimenta, M., Albuquerque, M. P., Prandini, E., Rado Cuchills, M. S., Reisenegger, A., Reville, B., Rho, C. D., Rovero, A. C., Ruiz-Velasco, E., Salazar, G. A., Sandoval, A., Santander, M., Schoorlemmer, H., Schüssler, F., Serrano, V. H., Shellard, R. C., Sinha, A., Smith, A. J., Surajbali, P., Tomé, B., Torres Aguilar, I., Eldik, C., Vergara-Quispe, I. D., Viana, A., Vícha, J., Vigorito, C. F., Wang, X., Werner, F., White, R., Zamalloa Jara, M. A., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and SWGO

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, Detector, Gamma rays, Gamma ray, Astronomy, FOS: Physical sciences, Galaxy, Cosmology, Tellurium compounds, Pulsar, SWGO - Abteilung Hinton, Observatory, Angular resolution, Halo, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Southern Hemisphere, Astrophysics::Galaxy Astrophysics, Pulsars
Abstract

The Southern Wide-field Gamma-ray Observatory (SWGO) is a proposed ground-based gamma-ray detector that will be located in the Southern Hemisphere and is currently in its design phase. In this contribution, we will outline the prospects for Galactic science with this Observatory. Particular focus will be given to the detectability of extended sources, such as gamma-ray halos around pulsars; optimisation of the angular resolution to mitigate source confusion between known TeV sources; and studies of the energy resolution and sensitivity required to study the spectral features of PeVatrons at the highest energies. Such a facility will ideally complement contemporaneous observatories in studies of high energy astrophysical processes in our Galaxy., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)

Published
2021
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5. Gamma/hadron discrimination using a small-WCD with four PMTs

Author

Ruben Conceição, Assis, P., Assunção, F., Bakalová, A., Barres Almeida, U., Bom, C. R., Correia, J., Angelis, A., Dias, L., González, B. S., Guillén, A., La Mura, G., Lourenço, N., Machado, P., Marques, S., Mendes, L., Pimenta, M., Shellard, R., Tomé, B., Vicha, J., Abreu, P., Albert, A., Angüner, E. O., Arcaro, C., Arnaldi, L. H., Arteaga-Velázquez, J. C., Batković, I., Bellido, J., Belmont-Moreno, E., Bisconti, F., Blanco, A., Bohacova, M., Bottacini, E., Bretz, T., Brisbois, C., Brogueira, P., Brown, A. M., Bulik, T., Caballero Mora, K. S., Campos, S. M., Chiavassa, A., Chytka, L., Consolati, G., Cotzomi Paleta, J., Dasso, S., La Fuente, E., Souza, V., Depaoli, D., Di Sciascio, G., Dib, C. O., Dorner, D., Doro, M., Du Vernois, M., Ergin, T., Fan, K. L., Fraija, N., Funk, S., García, J. I., García-González, J. A., García Roca, S. T., Giacinti, G., Goksu, H., Guarino, F., Haist, F., Hansen, P. M., Harding, J. P., Hinton, J., Hofmann, W., Hona, B., Hoyos, D., Huentemeyer, P., Hueyotl-Zahuantitla, F., Insolia, A., Janecek, P., Joshi, V., Khelifi, B., Kunwar, S., Lapington, J., Laspiur, M. R., Leitl, F., Longo, F., Lopes, L., Lopez-Coto, R., Mandat, D., Mariazzi, A. G., Mariotti, M., Marques Moraes, A., Martínez-Castro, J., Martínez-Huerta, H., May, S., Melo, D. G., Mendes, L. F., Mendes, L. M., Mineeva, T., Mitchell, A., Mohan, S., Morales Olivares, O. G., Moreno-Barbosa, E., Nellen, L., Novotny, V., Olivera-Nieto, L., Orlando, E., Pech, M., Pichel, A., Portes Albuquerque, M., Prandini, E., Rado Cuchills, M. S., Reisenegger, A., Reville, B., Rho, C. D., Rovero, A. C., Ruiz-Velasco, E., Salazar, G. A., Sandoval, A., Santander, M., Schoorlemmer, H., Schüssler, F., Serrano, V. H., Shellard, R. C., Sinha, A., Smith, A. J., Surajbali, P., Torres Aguilar, I., Eldik, C., Vergara-Quispe, I. D., Viana, A., Vigorito, C. F., Wang, X., Werner, F., White, R., and Zamalloa Jara, M. A.

Subjects
Physics, Muon, Observatory, Astrophysics::High Energy Astrophysical Phenomena, Detector, Hadron, Astrophysics::Instrumentation and Methods for Astrophysics, Phase (waves), Elevation, Square (algebra), Cherenkov radiation, Remote sensing
Abstract

The Southern Wide-field Gamma-ray Observatory (SWGO) is the next-generation gamma-ray observatory, currently in an R\&D phase. The experiment is expected to have a large array of water Cherenkov detectors (WCD) placed at a high elevation (> 4.4 km a.s.l.) in South America. Here we present a WCD concept with reduced surface area and height of stations comprising four PMTs at the bottom. We show that it is possible to reach an excellent gamma/hadron discrimination by analysing the data gathered by this station with machine learning techniques. Such performance can be achieved by analysing the shower patterns at the ground or through the PMTs signal time structure to tag muons. Moreover, it is shown that the station's performance does not depend on the array configuration (dense or sparse) nor on the shower inclination ($\theta < 40^\circ$). Such a concept reduces the cost associated with the transport of massive amounts of water to high elevation sites while keeping a high physics performance. Therefore, it could be a good candidate station for SWGO, enabling to reach good sensitivities from low energies ($\sim 100\,$GeV) up to the PeV region, covering large ground surface areas (few square km).

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