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1,059 results on '"Rojas D"'

1. Destete prolongado en paciente con miopatia congenita. El camino hacia la independencia de la ventilacion

Author

Perea R, Estrada MS, Carrasco S, Reyes N, Ortega Á, Vargas T, Llorente D, Gil A, Rojas D, Bravo JM, Celdrán J, and Jiménez M

Subjects
ventilación mecánica no invasiva, destete, enfermedad neuromuscular, traqueostomía, Medicine
Abstract

La ventilación mecánica, en su modalidad no invasiva (VMNI) o invasiva, es una pieza clave en el tratamiento de pacientes con enfermedades neuromusculares para resolver la hipoventilación alveolar consecuencia de la disfunción en la mecánica de la ventilación. La primera también juega un papel fundamental en el destete de la ventilación mecánica invasiva cuando resuelven el periodo agudo en las unidades de cuidados intensivos, funcionando como puente entre la dependencia del soporte continuo y la respiración autónoma. Presentamos un caso de un varón de 47 años que ingresa en la Unidad de Cuidados Intensivos (UCI) por encefalopatía hipercápnica y parada cardiorrespiratoria en el contexto de una neumonía adquirida en la comunidad. Tras tres meses en la UCI, se da de alta a la unidad de monitorización de la insuficiencia respiratoria de neumología, donde progresivamente se van reduciendo las horas de ventilación continua por traqueostomía en modo volumen control hasta manejar una aceptable situación clínica y control gasométrico con su uso exclusivo durante el sueño.

Published
2020

2. Ultra-high-energy gamma-ray bubble around microquasar V4641 Sgr

Author

Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Avila Rojas, D., Ayala Solares, H. A., Babu, R., Belmont-Moreno, E., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., Coutiño de León, S., De la Fuente, E., Depaoli, D., Di Lalla, N., Diaz Hernandez, R., Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Engel, K., Espinoza, C., Fan, K. L., Fang, K., Fraija, N., Fraija, S., García-González, J. A., Garfias, F., Gonzalez Muñoz, A., González, M. M., Goodman, J. A., Groetsch, S., Harding, J. P., Herzog, I., Hinton, J., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Joshi, V., Kaufmann, S., Kieda, D., de León, C., Lee, J., León Vargas, H., Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Martinez, O., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Olivera-Nieto, L., Omodei, N., Osorio, M., Pérez Araujo, Y., Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Salazar-Gallegos, D., Sandoval, A., Schneider, M., Serna-Franco, J., Smith, A. J., Son, Y., Springer, R. W., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Varela, E., Villaseñor, L., Wang, X., Watson, I. J., Willox, E., Yun-Cárcamo, S., and Zhou, H.

Published
2024
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3. Field satured hydraulic conductivity estimation on vinasse trated soil Estimación de la conductividad hidráulica saturada in situ en un suelo tratado con vinaza

Author

Menjívar Flórez Juan Carlos, Rojas Palacio Hernán, and Rojas D Ludwig M.

Subjects
Método de aplicación localizada, Modelos de simulación, Método de caída de carga, Riego, Point source method, Simulation models, Falling head method, Irrigation, Agriculture
Abstract

Changes for soil satured hydraulic conductivity were estimated by using the “falling head” and “point source” methods. The soil type trated with vinasse was Ustipsamment Typic Sandy Isohipertermic located at Colombia National University experimental center (3° 25' 39.81"; N, 76° 25' 45.70"; W; 953 m.s.n.m., 24 °C, 60% HR. and 1020 mm.). The used field methods did not show statistical differences for the estimation of the satured hydraulic conductivity (pKey words: Point source method; Simulation models; Falling head method; Irrigation.Se estimaron los cambios en la conductividad hidráulica saturada mediante las técnicas de “caída de carga” y “fuente localizada de agua” en un suelo Ustipsamment típico arenoso isohipertérmico con dosis diluidas de vinazas. La investigación se realizó en la Universidad Nacional de Colombia Sede Palmira (3° 25'39.81"; N y 76° 25'45.70"; O, 953 m.s.n.m, 24 °C y 60% HR, 1.020 mm). Los dos métodos no difirieron de forma significativa (pPalabras claves: Método de aplicación localizada; Modelos de simulación; Método de caída de carga; Riego.

Published
2008

6. Substitutional effects of In by Cu in CeIn2

Author

Rojas D. P., Espeso J. I., and Fernández J Rodríguez

Subjects
Physics, QC1-999
Abstract

We have investigated the evolution of the magnetic properties on the Ce(In1−x Cux)2 (0< x ≤ 0.3) series of alloys. The orthorhombic structure of the CeIn2 alloy(Imma)changes into the hexagonal AlB2-type (P6/mmm)for x = 0.05 and, then, into the hexagonal CaIn2-type(P63/mmm)for higher Cu concentrations, up to x = 0.3. The dc (ac) magnetic susceptibility shows an abrupt decrease of the magnetic transition temperature from 22K to 5.4K (x = 0.05). The results indicate the influence of the crystallographic type of structure and disorder effects on the magnetic behavior along the series.

Published
2014
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10. Multimessenger Gamma-Ray and Neutrino Coincidence Alerts Using HAWC and IceCube Subthreshold Data

Author

Solares, HA Ayala, Coutu, S, DeLaunay, JJ, Fox, DB, Grégoire, T, Keivani, A, Krauß, F, Mostafá, M, Murase, K, Turley, CF, Albert, A, Alfaro, R, Alvarez, C, Camacho, JR Angeles, Arteaga-Velázquez, JC, Arunbabu, KP, Rojas, D Avila, Belmont-Moreno, E, Brisbois, C, Caballero-Mora, KS, Carramiñana, A, Casanova, S, Cotti, U, De la Fuente, E, Hernandez, R Diaz, Dingus, BL, DuVernois, MA, Durocher, M, Díaz-Vélez, JC, Espinoza, C, Fan, KL, Fleischhack, H, Fraija, N, Galván-Gámez, A, Garcia, D, García-González, JA, Garfias, F, González, MM, Goodman, JA, Harding, JP, Hona, B, Huang, D, Hueyotl-Zahuantitla, F, Hüntemeyer, P, Iriarte, A, Jardin-Blicq, A, Joshi, V, Vargas, H León, Linnemann, JT, Longinotti, AL, Luis-Raya, G, Lundeen, J, Malone, K, Martinez, O, Martinez-Castellanos, I, Martínez-Castro, J, Matthews, JA, Miranda-Romagnoli, P, Moreno, E, Nellen, L, Newbold, M, Nisa, MU, Noriega-Papaqui, R, Peisker, A, Pérez-Pérez, EG, Rho, CD, Rosa-González, D, Salazar, H, Greus, F Salesa, Sandoval, A, Smith, AJ, Springer, RW, Tollefson, K, Torres, I, Torres-Escobedo, R, Ureña-Mena, F, Villaseñor, L, Weisgarber, T, Willox, E, Zepeda, A, Zhou, H, de León, C, Aartsen, MG, Abbasi, R, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Alispach, C, Amin, NM, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Argüelles, C, Auffenberg, J, Axani, S, Bagherpour, H, and Bai, X

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astro-ph.HE, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics, Space sciences
Abstract

The High Altitude Water Cerenkov (HAWC) and IceCube observatories, through the Astrophysical Multimessenger Observatory Network (AMON) framework, have developed a multimessenger joint search for extragalactic astrophysical sources. This analysis looks for sources that emit both cosmic neutrinos and gamma rays that are produced in photohadronic or hadronic interactions. The AMON system is running continuously, receiving subthreshold data (i.e., data that are not suited on their own to do astrophysical searches) from HAWC and IceCube, and combining them in real time. Here we present the analysis algorithm, as well as results from archival data collected between 2015 June and 2018 August, with a total live time of 3.0 yr. During this period we found two coincident events that have a false-alarm rate (FAR) of

Published
2021

12. The High-Altitude Water Cherenkov (HAWC) observatory in México: The primary detector

Author

Abeysekara, A.U., Albert, A., Alfaro, R., Alvarez, C., Álvarez, J.D., Araya, M., Arteaga-Velázquez, J.C., Arunbabu, K.P., Rojas, D. Avila, Solares, H.A. Ayala, Babu, R., Barber, A.S., Becerril, A., Belmont-Moreno, E., BenZvi, S.Y., Blanco, O., Braun, J., Brisbois, C., Caballero-Mora, K.S., Martínez, J.I. Cabrera, Capistrán, T., Carramiñana, A., Casanova, S., Castillo, M., Chaparro-Amaro, O., Cotti, U., Cotzomi, J., de León, S. Coutiño, de la Fuente, E., de León, C., De Young, T., Hernandez, R. Diaz, Dingus, B.L., DuVernois, M.A., Durocher, M., Díaz-Vélez, J.C., Ellsworth, R.W., Engel, K., Espinoza, C., Fan, K.L., Fang, K., Fick, B., Fleischhack, H., Flores, J.L., Fraija, N., García-González, J.A., Garcia-Torales, G., Garfias, F., Giacinti, G., Goksu, H., González, M.M., González-Muñoz, A., Goodman, J.A., Harding, J.P., Hernandez, E., Hernandez, S., Hinton, J., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hui, C.M., Humensky, T.B., Hüntemeyer, P., Iriarte, A., Imran, A., Jardin-Blicq, A., Joshi, V., Kaufmann, S., Kieda, D., Kunde, G.J., Lara, A., Lauer, R., Lee, W.H., Lennarz, D., Vargas, H. León, Linnemann, J.T., Longinotti, A.L., Luis-Raya, G., Lundeen, J., Malone, K., Marandon, V., Marinelli, A., Martinez, O., Martínez-Castellanos, I., Martínez-Castro, J., Martínez-Huerta, H., Matthews, J.A., Miranda-Romagnoli, P., Montaruli, T., Morales-Soto, J.A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M.U., Noriega-Papaqui, R., Oceguera-Becerra, T., Olivera-Nieto, L., Omodei, N., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E.G., Ponce, E., Pretz, J., Rho, C.D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Salazar-Gallegos, D., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Serna-Franco, J., Sinnis, G., Smith, A.J., Son, Y., Woodle, K. Sparks, Springer, R.W., Taboada, I., Tepe, A., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Ukwatta, T.N., Varela, E., Vargas-Magaña, M., Villaseñor, L., Wang, X., Watson, I.J., Werner, F., Westerhoff, S., Willox, E., Wisher, I., Wood, J., Yodh, G.B., Zaborov, D., Zepeda, A., and Zhou, H.

Published
2023
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18. All-sky Measurement of the Anisotropy of Cosmic Rays at 10 TeV and Mapping of the Local Interstellar Magnetic Field

Author

Abeysekara, AU, Alfaro, R, Alvarez, C, Arceo, R, Arteaga-Velázquez, JC, Rojas, D Avila, Belmont-Moreno, E, BenZvi, SY, Brisbois, C, Capistrán, T, Carramiana, A, Casanova, S, Cotti, U, Cotzomi, J, Díaz-Vélez, JC, De León, C, De la Fuente, E, Dichiara, S, DuVernois, MA, Espinoza, C, Fiorino, DW, Fleischhack, H, Fraija, N, Galván-Gámez, A, García-González, JA, González, MM, Goodman, JA, Hampel-Arias, Z, Harding, JP, Hernandez, S, Hona, B, Hueyotl-Zahuantitla, F, Iriarte, A, Jardin-Blicq, A, Joshi, V, Lara, A, Vargas, H León, Luis-Raya, G, Malone, K, Marinelli, SS, Martínez-Castro, J, Martinez, O, Matthews, JA, Miranda-Romagnoli, P, Moreno, E, Mostafá, M, Nellen, L, Newbold, M, Nisa, MU, Noriega-Papaqui, R, Pérez-Pérez, EG, Pretz, J, Ren, Z, Rho, CD, Rivière, C, Rosa-González, D, Rosenberg, M, Salazar, H, Greus, F Salesa, Sandoval, A, Schneider, M, Schoorlemmer, H, Sinnis, G, Smith, AJ, Surajbali, P, Taboada, I, Tollefson, K, Torres, I, Villaseor, L, Weisgarber, T, Wood, J, Zepeda, A, Zhou, H, Álvarez, JD, Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Argüelles, C, Auffenberg, J, Axani, S, Backes, P, Bagherpour, H, Bai, X, Barbano, A, Barron, JP, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, and BenZvi, S

Subjects
Particle and High Energy Physics, Astronomical Sciences, Physical Sciences, astroparticle physics, cosmic rays, ISM: magnetic fields, astro-ph.HE, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics, Space sciences
Abstract

We present the first full-sky analysis of the cosmic ray arrival direction distribution with data collected by the High-Altitude Water Cherenkov and IceCube observatories in the northern and southern hemispheres at the same median primary particle energy of 10 TeV. The combined sky map and angular power spectrum largely eliminate biases that result from partial sky coverage and present a key to probe into the propagation properties of TeV cosmic rays through our local interstellar medium and the interaction between the interstellar and heliospheric magnetic fields. From the map, we determine the horizontal dipole components of the anisotropy δ 0h = 9.16 ×10-4 and δ 6h = 7.25 ×10-4 (±0.04 × 10-4). In addition, we infer the direction (229.°2 ± 3.°5 R.A., 11.°4 ± 3.°0 decl.) of the interstellar magnetic field from the boundary between large-scale excess and deficit regions from which we estimate the missing corresponding vertical dipole component of the large-scale anisotropy to be δN ∼ -3.97+1.0-2.0 × 10-4.

Published
2019

19. Gamma/hadron separation with the HAWC observatory

Author

Alfaro, R., Alvarez, C., Álvarez, J.D., Angeles Camacho, J.R., Arteaga-Velázquez, J.C., Avila Rojas, D., Ayala Solares, H.A., Babu, R., Belmont-Moreno, E., Brisbois, C., Caballero-Mora, K.S., Capistrán, T., Carramiñana, A., Casanova, S., Chaparro-Amaro, O., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., de León, C., Diaz Hernandez, R., Dingus, B.L., DuVernois, M.A., Durocher, M., Díaz-Vélez, J.C., Ellsworth, R.W., Engel, K., Espinoza, C., Fan, K.L., Fernández Alonso, M., Fraija, N., Garcia, D., García-González, J.A., Garfias, F., González, M.M., Goodman, J.A., Harding, J.P., Hernandez, S., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kaufmann, S., Kunde, G.J., Lara, A., Lee, W.H., Lee, J., León Vargas, H., Linnemann, J.T., Luis-Raya, G., Lundeen, J., Malone, K., Marandon, V., Martinez, O., Martínez-Castro, J., Matthews, J.A., Miranda-Romagnoli, P., Morales-Soto, J.A., Nayerhoda, A., Nellen, L., Nisa, M.U., Noriega-Papaqui, R., Olivera-Nieto, L., Omodei, N., Peisker, A., Pérez Araujo, Y., Pérez-Pérez, E.G., Rho, C.D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Salesa Greus, F., Sandoval, A., Saz Parkinson, P.M., Serna-Franco, J., Smith, A.J., Springer, R.W., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Villaseñor, L., Wang, X., Watson, I.J., Werner, F., Willox, E., Wood, J., Zepeda, A., and Zhou, H.

Published
2022
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20. Search for Joint Multimessenger Signals from Potential Galactic Cosmic-Ray Accelerators with HAWC and IceCube.

Author

Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Avila Rojas, D., Ayala Solares, H. A., Babu, R., Belmont-Moreno, E., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., Depaoli, D., Di Lalla, N., Diaz Hernandez, R., Díaz-Vélez, J. C., and Engel, K.

Subjects
GALACTIC cosmic rays, NEUTRINO astrophysics, ASTROPHYSICS, COSMIC rays, ASTRONOMY, NEUTRINOS, RADIATION
Abstract

The origin of high-energy galactic cosmic rays is yet to be understood, but some galactic cosmic-ray accelerators can accelerate cosmic rays up to PeV energies. The high-energy cosmic rays are expected to interact with the surrounding material or radiation, resulting in the production of gamma-rays and neutrinos. To optimize for the detection of such associated production of gamma-rays and neutrinos for a given source morphology and spectrum, a multimessenger analysis that combines gamma-rays and neutrinos is required. In this study, we use the Multi-Mission Maximum Likelihood framework with IceCube Maximum Likelihood Analysis software and HAWC Accelerated Likelihood to search for a correlation between 22 known gamma-ray sources from the third HAWC gamma-ray catalog and 14 yr of IceCube track-like data. No significant neutrino emission from the direction of the HAWC sources was found. We report the best-fit gamma-ray model and 90% CL neutrino flux limit from the 22 sources. From the neutrino flux limit, we conclude that, for five of the sources, the gamma-ray emission observed by HAWC cannot be produced purely from hadronic interactions. We report the limit for the fraction of gamma-rays produced by hadronic interactions for these five sources. [ABSTRACT FROM AUTHOR]

Published
2024
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21. Spectral Study of Very-high-energy Gamma Rays from SS 433 with HAWC.

Author

Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Avila Rojas, D., Ayala Solares, H. A., Babu, R., Belmont-Moreno, E., Bernal, A., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotzomi, J., Fuente, E. De la, Depaoli, D., Di Lalla, N., Diaz Hernandez, R., Dingus, B. L., DuVernois, M. A., and Engel, K.

Subjects
SPECTRAL energy distribution, X-ray binaries, ASTROPHYSICAL jets, GAMMA rays, CROWDSOURCING
Abstract

Very-high-energy (0.1–100 TeV) gamma-ray emissions were observed in High-Altitude Water Cherenkov (HAWC) data from the lobes of the microquasar SS 433, making them the first set of astrophysical jets that were resolved at TeV energies. In this work, we update the analysis of SS 433 using 2565 days of data from the HAWC observatory. Our analysis reports the detection of a point-like source in the east lobe at a significance of 6.6 σ and in the west lobe at a significance of 8.2 σ. For each jet lobe, we localize the gamma-ray emission and identify a best-fit position. The locations are close to the X-ray emission sites "e1" and "w1" for the east and west lobes, respectively. We analyze the spectral energy distributions and find that the energy spectra of the lobes are consistent with a simple power law d N / d E ∝ E α with α = − 2.44 − 0.12 − 0.04 + 0.13 + 0.04 and α = − 2.35 − 0.11 − 0.03 + 0.12 + 0.03 for the east and west lobes, respectively. The maximum energy of photons from the east and west lobes reaches 56 TeV and 123 TeV, respectively. We compare our observations to various models and conclude that the very-high-energy gamma-ray emission can be produced by a population of electrons that were efficiently accelerated. [ABSTRACT FROM AUTHOR]

Published
2024
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22. Testing the molecular cloud paradigm for ultra-high-energy gamma ray emission from the direction of SNR G106.3+2.7.

Author

Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Avila Rojas, D., Ayala Solares, H. A., Babu, R., Belmont-Moreno, E., Bernal, A., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., Coutiño de León, S., De la Fuente, E., de León, C., Depaoli, D., Desiati, P., and Di Lalla, N.

Abstract

Context. Supernova remnants (SNRs) are believed to be capable of accelerating cosmic rays (CRs) to PeV energies. SNR G106.3+2.7 is a prime PeVatron candidate. It is formed by a head region, where the pulsar J2229+6114 and its boomerang-shaped pulsar wind nebula are located, and a tail region containing SN ejecta. The lack of observed gamma ray emission from the two regions of this SNR has made it difficult to assess which region would be responsible for the PeV CRs. Aims. We aim to characterize the very-high-energy (VHE, 0.1–100 TeV) gamma ray emission from SNR G106.3+2.7 by determining the morphology and spectral energy distribution of the region. This is accomplished using 2565 days of data and improved reconstruction algorithms from the High Altitude Water Cherenkov (HAWC) Observatory. We also explore possible gamma ray production mechanisms for different energy ranges. Methods. Using a multi-source fitting procedure based on a maximum-likelihood estimation method, we evaluate the complex nature of this region. We determine the morphology, spectrum, and energy range for the source found in the region. Molecular cloud information is also used to create a template and evaluate the HAWC gamma ray spectral properties at ultra-high-energies (UHE, > 56 TeV). This will help probe the hadronic nature of the highest-energy emission from the region. Results. We resolve one extended source coincident with all other gamma ray observations of the region. The emission reaches above 100 TeV and its preferred log-parabola shape in the spectrum shows a flux peak in the TeV range. The molecular cloud template fit on the higher energy data reveals that the SNR's energy budget is fully capable of producing a purely hadronic source for UHE gamma rays. Conclusions. The HAWC observatory resolves one extended source between the head and the tail of SNR G106.3+2.7 in the VHE gamma ray regime. The template fit suggests the highest energy gamma rays could come from a hadronic origin. However, the leptonic scenario, or a combination of the two, cannot be excluded at this time. [ABSTRACT FROM AUTHOR]

Published
2024
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23. Performance of the HAWC Observatory and TeV Gamma-Ray Measurements of the Crab Nebula with Improved Extensive Air Shower Reconstruction Algorithms.

Author

Albert, A., Alfaro, R., Alvarez, C., Andrés, A., Arteaga-Velázquez, J. C., Avila Rojas, D., Ayala Solares, H. A., Babu, R., Belmont-Moreno, E., Bernal, A., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Carreón, F., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, Fuente, E. De la, and de León, C.

Subjects
COSMIC ray showers, CRAB Nebula, DISTRIBUTION (Probability theory), GAMMA rays, ZENITH distance
Abstract

The High-Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory, located on the side of the Sierra Negra volcano in Mexico, has been fully operational since 2015. The HAWC collaboration has recently significantly improved their extensive air shower reconstruction algorithms, which has notably advanced the observatory performance. The energy resolution for primary gamma rays with energies below 1 TeV was improved by including a noise-suppression algorithm. Corrections have also been made to systematic errors in direction fitting related to the detector and shower plane inclinations, O (0.° 1) biases in highly inclined showers, and enhancements to the core reconstruction. The angular resolution for gamma rays approaching the HAWC array from large zenith angles (>37°) has improved by a factor of 4 at the highest energies (>70 TeV) as compared to previous reconstructions. The inclusion of a lateral distribution function fit to the extensive air shower footprint on the array to separate gamma-ray primaries from cosmic-ray ones based on the resulting χ 2 values improved the background rejection performance at all inclinations. At large zenith angles, the improvement in significance is a factor of 4 compared to previous HAWC publications. These enhancements have been verified by observing the Crab Nebula, which is an overhead source for the HAWC Observatory. We show that the sensitivity to Crab-like point sources (E −2.63) with locations overhead to 30° zenith is comparable to or less than 10% of the Crab Nebula's flux between 2 and 50 TeV. Thanks to these improvements, HAWC can now detect more sources, including the Galactic center. [ABSTRACT FROM AUTHOR]

Published
2024
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29. HAWC observations of the acceleration of very-high-energy cosmic rays in the Cygnus Cocoon

Author

Abeysekara, A. U., Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Blandford, R., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., León, S. Coutiño de, De la Fuente, E., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Ellsworth, R. W., Engel, K., Espinoza, C., Fan, K. L., Fang, K., Fleischhack, H., Fraija, N., Galván-Gámez, A., Garcia, D., García-González, J. A., Garfias, F., Giacinti, G., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hinton, J., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kieda, D., Lara, A., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., Malone, K., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Olivera-Nieto, L., Omodei, N., Peisker, A., Pérez Araujo, Y., Pérez-Pérez, E. G., Ren, Z., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Serna, F., Smith, A. J., Springer, R. W., Surajbali, P., Tollefson, K., Torres, I., Torres-Escobedo, R., Ureña-Mena, F., Weisgarber, T., Werner, F., Willox, E., Zepeda, A., Zhou, H., De León, C., and Álvarez, J. D.

Published
2021
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35. HAWC as a Ground-Based Space-Weather Observatory

Author

Alvarez, C., Angeles Camacho, J. R., Arteaga-Velázquez, J. C., Arunbabu, K. P., Avila Rojas, D., Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Colín-Farias, P., Cotti, U., Cotzomi, J., Coutiño de León, S., De la Fuente, E., Dichiara, S., Dingus, B. L., DuVernois, M. A., Díaz-Vélez, J. C., Espinoza, C., Fraija, N., Galván-Gámez, A., Garcia, D., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Iriarte, A., Joshi, V., Kunde, G. J., Lara, A., León Vargas, H., Longinotti, A. L., Luis-Raya, G., Malone, K., Martinez, O., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Nayerhoda, A., Nellen, L., Newbold, M., Noriega-Papaqui, R., Peisker, A., Pérez Araujo, Y., Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Rosenberg, M., Ryan, J., Salazar, H., Sandoval, A., Springer, R. W., Tabachnick, E., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Villaseñor, L., Zepeda, A., Zhou, H., and de León, C.

Published
2021
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38. Author Correction: HAWC observations of the acceleration of very-high-energy cosmic rays in the Cygnus Cocoon

Author

Abeysekara, A. U., Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Baghmanyan, V., Belmont-Moreno, E., BenZvi, S. Y., Blandford, R., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., de León, S. Coutiño, De la Fuente, E., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Ellsworth, R. W., Engel, K., Espinoza, C., Fan, K. L., Fang, K., Fleischhack, H., Fraija, N., Galván-Gámez, A., Garcia, D., García-González, J. A., Garfias, F., Giacinti, G., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hinton, J., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kieda, D., Lara, A., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., Malone, K., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Olivera-Nieto, L., Omodei, N., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Ren, Z., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Serna, F., Smith, A. J., Springer, R. W., Surajbali, P., Tollefson, K., Torres, I., Torres-Escobedo, R., Ureña-Mena, F., Weisgarber, T., Werner, F., Willox, E., Zepeda, A., Zhou, H., De León, C., and Álvarez, J. D.

Published
2021
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39. Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth

Author

Abeysekara, A. U., Albert, A., Alfaro, R., Alvarez, C., Álvarez, J. D., Arceo, R., Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, Barber, A. S., Bautista-Elivar, N., Becerril, A., Belmont-Moreno, E., BenZvi, S. Y., Berley, D., Bernal, A., Braun, J., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Castillo, M., Cotti, U., Cotzomi, J., de León, S. Coutiño, De León, C., De la Fuente, E., Dingus, B. L., DuVernois, M. A., Díaz-Vélez, J. C., Ellsworth, R. W., Engel, K., Enríquez-Rivera, O., Fiorino, D. W., Fraija, N., García-González, J. A., Garfias, F., Gerhardt, M., González Muñoz, A., González, M. M., Goodman, J. A., Hampel-Arias, Z., Harding, J. P., Hernández, S., Hernández-Almada, A., Hinton, J., Hona, B., Hui, C. M., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kaufmann, S., Kieda, D., Lara, A., Lauer, R. J., Lee, W. H., Lennarz, D., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Raya, G. Luis, Luna-García, R., López-Coto, R., Malone, K., S. Marinelli, S., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Martínez-Huerta, H., Matthews, J. A., Miranda-Romagnoli, P., Moreno, E., Mostafá, M., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Pelayo, R., Pretz, J., Pérez-Pérez, E. G., Ren, Z., Rho, C. D., Rivière, C., Rosa-González, D., Rosenberg, M., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Taboada, I., Tibolla, O., Tollefson, K., Torres, I., Ukwatta, T. N., Vianello, G., Weisgarber, T., Westerhoff, S., Wisher, I. G., Wood, J., Yapici, T., Yodh, G., Younk, P. W., Zepeda, A., Zhou, H., Guo, F., Hahn, J., Li, H., and Zhang, H.

Published
2017

46. Very-high-energy particle acceleration powered by the jets of the microquasar SS 433

Author

Abeysekara, A. U., Albert, A., Alfaro, R., Alvarez, C., Álvarez, J. D., Arceo, R., Arteaga-Velázquez, J. C., Avila Rojas, D., Ayala Solares, H. A., Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Castillo, M., Cotti, U., Cotzomi, J., Coutiño de León, S., De León, C., De la Fuente, E., Díaz-Vélez, J. C., Dichiara, S., Dingus, B. L., DuVernois, M. A., Ellsworth, R. W., Engel, K., Espinoza, C., Fang, K., Fleischhack, H., Fraija, N., Galván-Gámez, A., García-González, J. A., Garfias, F., González-Muñoz, A., González, M. M., Goodman, J. A., Hampel-Arias, Z., Harding, J. P., Hernandez, S., Hinton, J., Hona, B., Hueyotl-Zahuantitla, F., Hui, C. M., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kaufmann, S., Kar, P., Kunde, G. J., Lauer, R. J., Lee, W. H., León Vargas, H., Li, H., Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., López-Coto, R., Malone, K., Marinelli, S. S., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Pretz, J., Pérez-Pérez, E. G., Ren, Z., Rho, C. D., Rivière, C., Rosa-González, D., Rosenberg, M., Ruiz-Velasco, E., Salesa Greus, F., Sandoval, A., Schneider, M., Schoorlemmer, H., Seglar Arroyo, M., Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Taboada, I., Tibolla, O., Tollefson, K., Torres, I., Vianello, G., Villaseñor, L., Weisgarber, T., Werner, F., Westerhoff, S., Wood, J., Yapici, T., Yodh, G., Zepeda, A., Zhang, H., and Zhou, H.

Published
2018
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50. Misdiagnosis trends in patients with hereditary angioedema from the real-world clinical setting

Author

Aberer, W., Grumach, A., Bygum, A., Blanchard Delaunay, C., Bouillet, L., Coppere, B., Fain, O., Goichot, B., Gompel, A., Guez, S., Jeandel, P., Kanny, G., Launay, D., Maillard, H., Martin, L., Masseau, A., Ollivier, Y., Sobel, A., Arnolds, J., Aygören-Pürsün, E., Baş, M., Bauer, A., Bork, K., Martinez, I., Maurer, M., Papadopoulou-Alataki, E., Psarros, F., Graif, Y., Kivity, S., Reshef, A., Toubi, E., Arcoleo, F., Cicardi, M., Manconi, P., Marone, G., Montinaro, V., Baeza, M.L., Caballero, T., Cabañas, R., Guilarte, M., Hernandez de Rojas, D., Hernando de Larramendi, C., Lleonart, R., Lobera, T., Sáenz de San Pedro, B., Bjorkander, J., Helbert, M., Longhurst, H.J., Zanichelli, Andrea, Longhurst, Hilary J., Maurer, Marcus, Bouillet, Laurence, Aberer, Werner, Fabien, Vincent, Andresen, Irmgard, and Caballero, Teresa

Published
2016
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