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114 results on '"Arteaga Velázquez, J. C."'

1. Spectral study of very high energy gamma rays from SS 433 with HAWC

Author

Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, Babu, R., Belmont-Moreno, E., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotzomi, J., De la Fuente, E., Depaoli, D., Di Lalla, N., Hernandez, R. Diaz, Dingus, B. L ., DuVernois, M. A., Engel, K., Ergin, T., Espinoza, C ., Fan, K. L., Fang, K., Fraija, N., Fraija, S., García-González, J. A., Muñoz, A. González, González, M. M., Goodman, J. A., Groetsch, S., Harding, J. P., Hernández-Cadena, S., Herzog, I., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Kaufmann, S., Lara, A ., Lee, W. H., Lee, J., de León, C., Vargas, H. León, Longinotti, A. L., Luis-Raya, G., Malone, K., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Montes, J. A., Moreno, E., Mostafá, M., Nellen, L., Nisa, M. U ., Noriega-Papaqui, R ., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E ., Salazar, H., 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., Wang, Z., Watson, I. J., Yu, S ., Yun-Cárcamo, S., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Very-high-energy (0.1-100 TeV) gamma-ray emission was observed in 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 2,565 days of data from the High Altitude Water Cherenkov (HAWC) observatory. Our analysis reports the detection of a point-like source in the east lobe at a significance of $6.6\,\sigma$ and in the west lobe at a significance of $8.2\,\sigma$. 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 $\text{d}N/\text{d}E\propto E^{\alpha}$ with $\alpha = -2.44^{+0.13+0.04}_{-0.12-0.04}$ and $\alpha = -2.35^{+0.12+0.03}_{-0.11-0.03}$ 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.

Published
2024
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2. Ultra-High-Energy Gamma-Ray Bubble around Microquasar V4641 Sgr

Author

Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, 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., Hernandez, R. Diaz, 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., Muñoz, A. Gonzalez, 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., Vargas, H. León, 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., Araujo, Y. Pérez, 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.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Microquasars are laboratories for the study of jets of relativistic particles produced by accretion onto a spinning black hole. Microquasars are near enough to allow detailed imaging of spatial features across the multiwavelength spectrum. The recent extension of the spatial morphology of a microquasar, SS 433, to TeV gamma rays \cite{abeysekara2018very} localizes the acceleration of electrons at shocks in the jet far from the black hole \cite{hess2024ss433}. Here we report TeV gamma-ray emission from another microquasar, V4641~Sgr, which reveals particle acceleration at similar distances from the black hole as SS~433. Additionally, the gamma-ray spectrum of V4641 is among the hardest TeV spectra observed from any known gamma-ray source and is detected up to 200 TeV. Gamma rays are produced by particles, either electrons or hadrons, of higher energies. Because electrons lose energy more quickly the higher their energy, such a spectrum either very strongly constrains the electron production mechanism or points to the acceleration of high-energy hadrons. This observation suggests that large-scale jets from microquasars could be more common than previously expected and that microquasars could be a significant source of Galactic cosmic rays. high energy gamma-rays also provide unique constraints on the acceleration mechanisms of extra-Galactic cosmic rays postulated to be produced by the supermassive black holes and relativistic jets of quasars. The distance to quasars limits imaging studies due to insufficient angular resolution of gamma-rays and due to attenuation of the highest energy gamma-rays by the extragalactic background light.

Published
2024
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3. 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., Rojas, D. Avila, Solares, H. A. Ayala, Babu, R., Belmont-Moreno, E., Bernal, A., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., de León, C., Depaoli, D., Desiati, P., Di Lalla, N., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Engel, K., Ergin, T., Espinoza, C., Fan, K. L., Fang, K., Fraija, N., Fraija, S., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Groetsch, S., Harding, J. P., Hernández-Cadena, S., Herzog, I., Hinton, J., Huang, D., Hueyotl-Zahuantitla, F., Humensky, T. B., Hüntemeyer, P., Kaufmann, S., Kieda, D., Lee, W. H., Lee, J., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Martinez, O., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Montes, J. A., Moreno, E., Mostafá, M., Nellen, L., Nisa, M. U., Olivera-Nieto, L., Omodei, N., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., 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., Wang, Z., Watson, I. J., Willox, E., Yu, S., Yun-Cárcamo, S., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

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. 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 HAWC Observatory. We also explore possible gamma ray production mechanisms for different energy ranges. 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. 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.

Published
2024
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4. TeV Analysis of a Source Rich Region with HAWC Observatory: Is HESS J1809-193 a Potential Hadronic PeVatron?

Author

Albert, A., Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Rojas, D. Avila, Babu, R., Belmont-Moreno, E., Bernal, A., Breuhaus, M., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotzomi, J., De la Fuente, E., Depaoli, D., Di Lalla, N., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Espinoza, C., Fan, K. L., Fang, K., Fick, B., Fraija, N., García-González, J. A., Garfias, F., Munoz, A. Gonzalez, González, M. M., Goodman, J. A., Groetsch, S., Harding, J. P., Hernández-Cadena, S., Herzog, I., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Joshi, V., Kaufmann, S., Lara, A., Lee, J., Vargas, H. León, Longinotti, A. L., Luis-Raya, G., Malone, K., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Montes, J. A., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Osorio, M., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., 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., Wang, X., Watson, I. J., Willox, E., Yun-Cárcamo, S., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Abstract

HESS J1809-193 is an unidentified TeV source, first detected by the High Energy Stereoscopic System (H.E.S.S.) Collaboration. The emission originates in a source-rich region that includes several Supernova Remnants (SNR) and Pulsars (PSR) including SNR G11.1+0.1, SNR G11.0-0.0, and the young radio pulsar J1809-1917. Originally classified as a pulsar wind nebula (PWN) candidate, recent studies show the peak of the TeV region overlapping with a system of molecular clouds. This resulted in the revision of the original leptonic scenario to look for alternate hadronic scenarios. Marked as a potential PeVatron candidate, this region has been studied extensively by H.E.S.S. due to its emission extending up-to several tens of TeV. In this work, we use 2398 days of data from the High Altitude Water Cherenkov (HAWC) observatory to carry out a systematic source search for the HESS J1809-193 region. We were able to resolve emission detected as an extended component (modelled as a Symmetric Gaussian with a 1 $\sigma$ radius of 0.21 $^\circ$) with no clear cutoff at high energies and emitting photons up-to 210 TeV. We model the multi-wavelength observations for the region HESS J1809-193 using a time-dependent leptonic model and a lepto-hadronic model. Our model indicates that both scenarios could explain the observed data within the region of HESS J1809-193.

Published
2024

5. Observation of the Galactic Center PeVatron Beyond 100 TeV with HAWC

Author

Albert, A., Alfaro, R., Alvarez, C., Andrés, A., Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, Babu, R., Belmont-Moreno, E., Bernal, A., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., de León, C., Depaoli, D., Di Lalla, N., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Díaz-Vélez, J. C., Engel, K., Ergin, T., Espinoza, C., Fan, K. L., Fang, K., Fraija, N., Fraija, S., García-González, J. A., Garfias, F., Goksu, H., González, M. M., Goodman, J. A., Groetsch, S., Harding, J. P., Hernández-Cadena, S., Herzog, I., Hinton, J., Huang, D., Hueyotl-Zahuantitla, F., Humensky, T. B., Hüntemeyer, P., Iriarte, A., Kaufmann, S., Kieda, D., Lara, A., Lee, W. H., Lee, J., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Martinez, O., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Montes, J. A., Morales-Soto, J. A., Moreno, E., Mostafá, M., Najafi, M., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Olivera-Nieto, L., Omodei, N., Osorio-Archila, M., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Salazar-Gallegos, D., Sandoval, A., Schneider, M., Schwefer, G., 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., Wang, X., Wang, Z., Watson, I. J., Willox, E., Wu, H., Yu, S., Yun-Cárcamo, S., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

We report an observation of ultra-high energy (UHE) gamma rays from the Galactic Center region, using seven years of data collected by the High-Altitude Water Cherenkov (HAWC) Observatory. The HAWC data are best described as a point-like source (HAWC J1746-2856) with a power-law spectrum ($\mathrm{d}N/\mathrm{d}E=\phi(E/26 \,\text{TeV})^{\gamma}$), where $\gamma=-2.88 \pm 0.15_{\text{stat}} - 0.1_{\text{sys}} $ and $\phi=1.5 \times 10^{-15}$ (TeV cm$^{2}$s)$^{-1}$ $\pm\, 0.3_{\text{stat}}\,^{+0.08_{\text{sys}}}_{-0.13_{\text{sys}}}$ extending from 6 to 114 TeV. We find no evidence of a spectral cutoff up to $100$ TeV using HAWC data. Two known point-like gamma-ray sources are spatially coincident with the HAWC gamma-ray excess: Sgr A$^{*}$ (HESS J1745-290) and the Arc (HESS J1746-285). We subtract the known flux contribution of these point sources from the measured flux of HAWC J1746-2856 to exclude their contamination and show that the excess observed by HAWC remains significant ($>$5$\sigma$) with the spectrum extending to $>$100 TeV. Our result supports that these detected UHE gamma rays can originate via hadronic interaction of PeV cosmic-ray protons with the dense ambient gas and confirms the presence of a proton PeVatron at the Galactic Center.

Published
2024

6. Analysis of the Emission and Morphology of the Pulsar Wind Nebula Candidate HAWC J2031+415

Author

Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, 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., de León, C., Depaoli, D., Di Lalla, N., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Díaz-Vélez, J. C., Engel, K., Ergin, T., Espinoza, C., Fan, K. L., Fraija, N., García-González, J. A., González, M. M., Goodman, J. A., Groetsch, S., Harding, J. P., Hernández-Cadena, S., Herzog, I., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Kaufmann, S., Lee, J., Vargas, H. León, Longinotti, A. L., Luis-Raya, G., Malone, K., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Montes, . A., Moreno, E., Mostafá, M., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Araujo, Y. Pérez, 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., Wang, Zhen, Watson, I. J., Yu, S., Yun-Cárcamo, S., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Abstract

The first TeV gamma-ray source with no lower energy counterparts, TeV J2032+4130, was discovered by HEGRA. It appears in the third HAWC catalog as 3HWC J2031+415 and it is a bright TeV gamma-ray source whose emission has previously been resolved as 2 sources: HAWC J2031+415 and HAWC J2030+409. While HAWC J2030+409 has since been associated with the \emph{Fermi-LAT} Cygnus Cocoon, no such association for HAWC J2031+415 has yet been found. In this work, we investigate the spectrum and energy-dependent morphology of HAWC J2031+415. We associate HAWC J2031+415 with the pulsar PSR J2032+4127 and perform a combined multi-wavelength analysis using radio, X-ray, and $\gamma$-ray emission. We conclude that HAWC J2031+415 and, by extension, TeV J2032+4130 are most probably a pulsar wind nebula (PWN) powered by PSR J2032+4127.

Published
2024
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7. 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., Rojas, D. Avila, Solares, H. A. Ayala, 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., de León, C., Depaoli, D., Di Lalla, N., Hernandez, R. Diaz, Dingus, B. L ., DuVernois, M. A., Engel, K., Ergin, T., Espinoza, C ., Fan, K. L., Fang, K., Fraija, N., Fraija, S., García-González, J. A., Garfias, F., Goksu, H ., González, M. M., Goodman, J. A., Groetsch, S., Harding, J. P., Hernández-Cadena, S., Herzog, I., Hinton, J ., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Kaufmann, S., Lara, A ., Lee, J., Vargas, H. León, Linnemann, J. T ., Longinotti, A. L., Luis-Raya, G., Malone, K., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Montes, J. A., Moreno, E., Mostafá, M., Nellen, L., Nisa, M. U ., Noriega-Papaqui, R ., Olivera-Nieto, L ., Omodei, N., Osorio, M., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E ., Salazar, H., Salazar-Gallegos, D., Sandoval, A., Schneider, M., Schwefer, G ., 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 ., Wang, X., Watson, I. J., Whitaker, K., Willox, E., Wu, H., Yu, S ., Yun-Cárcamo, S., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
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, $\mathcal{O}(0.1^{\circ})$ biases in highly inclined showers, as well as enhancements to the core reconstruction. The angular resolution for gamma rays approaching the HAWC array from large zenith angles ($> 37^{\circ}$) has improved by a factor of four 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 $\chi^{2}$ values, improved the background rejection performance at all inclinations. At large zenith angles, the improvement in significance is a factor of four 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$^{\circ}$ zenith is comparable 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.

Published
2024

8. Search for joint multimessenger signals from potential Galactic PeVatrons with HAWC and IceCube

Author

Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, 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., Hernandez, R. Diaz, Díaz-Vélez, J. C., Engel, K., Ergin, T., Fan, K. L., Fang, K., Fraija, N., Fraija, S., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Groetsch, S., Harding, J. P., Hernández-Cadena, S., Herzog, I., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Kaufmann, S., Lee, J., Vargas, H. León, Longinotti, A. L., Luis-Raya, G., Malone, K., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Montes, J. A., Moreno, E., Mostafá, M., Nellen, L., Omodei, N., Osorio, M., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Salazar, H., Salazar-Gallegos, D., Sandoval, A., Schneider, M., Serna-Franco, J., Smith, A. J., Son, Y., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Wang, X., Watson, I. J., Whitaker, K., Willox, E., Wu, H., Yun-Cárcamo, S., Zhou, H., de León, C., Abbasi, R., Ackermann, M., Adams, J., Agarwalla, S. K., Aguilar, J. A., Ahlers, M., Alameddine, J. M., Amin, N. M., Andeen, K., Argüelles, C., Ashida, Y., Athanasiadou, S., Ausborm, L., Axani, S. N., Bai, X., V., A. Balagopal, Baricevic, M., Barwick, S. W., Bash, S., Basu, V., Bay, R., Beatty, J. J., Tjus, J. Becker, Beise, J., Bellenghi, C., Benning, C., BenZvi, S., Berley, D., Bernardini, E., Besson, D. Z., Blaufuss, E., Bloom, L., Blot, S., Bontempo, F., Motzkin, J. Y. Book, Meneguolo, C. Boscolo, Böser, S., Botner, O., Böttcher, J., Braun, J., Brinson, B., Brostean-Kaiser, J., Brusa, L., Burley, R. T., Butterfield, D., Campana, M. A., Caracas, I., Carloni, K., Carpio, J., Chattopadhyay, S., Chau, N., Chen, Z., Chirkin, D., Choi, S., Clark, B. A., Coleman, A., Collin, G. H., Connolly, A., Conrad, J. M., Coppin, P., Corley, R., Correa, P., Cowen, D. F., Dave, P., De Clercq, C., DeLaunay, J. J., Delgado, D., Deng, S., Desai, A., Desiati, P., de Vries, K. D., de Wasseige, G., DeYoung, T., Diaz, A., Dierichs, P., Dittmer, M., Domi, A., Draper, L., Dujmovic, H., Dutta, K., DuVernois, M. A., Ehrhardt, T., Eidenschink, L., Eimer, A., Eller, P., Ellinger, E., Mentawi, S. El, Elsässer, D., Engel, R., Erpenbeck, H., Evans, J., Evenson, P. A., Farrag, K., Fazely, A. R., Fedynitch, A., Feigl, N., Fiedlschuster, S., Finley, C., Fischer, L., Fox, D., Franckowiak, A., Fukami, S., Fürst, P., Gallagher, J., Ganster, E., Garcia, A., Garcia, M., Garg, G., Genton, E., Gerhardt, L., Ghadimi, A., Girard-Carillo, C., Glaser, C., Glüsenkamp, T., Gonzalez, J. G., Goswami, S., Granados, A., Grant, D., Gray, S. J., Gries, O., Griffin, S., Griswold, S., Groth, K. M., Günther, C., Gutjahr, P., Ha, C., Haack, C., Hallgren, A., Halve, L., Halzen, F., Hamdaoui, H., Minh, M. Ha, Handt, M., Hanson, K., Hardin, J., Harnisch, A. A., Hatch, P., Haungs, A., Häußler, J., Helbing, K., Hellrung, J., Hermannsgabner, J., Heuermann, L., Heyer, N., Hickford, S., Hidvegi, A., Hill, C., Hill, G. C., Hoffman, K. D., Hori, S., Hoshina, K., Hostert, M., Hou, W., Huber, T., Hultqvist, K., Hünnefeld, M., Hussain, R., Hymon, K., Ishihara, A., Iwakiri, W., Jacquart, M., Janik, O., Jansson, M., Japaridze, G. S., Jeong, M., Jin, M., Jones, B. J. P., Kamp, N., Kang, D., Kang, W., Kang, X., Kappes, A., Kappesser, D., Kardum, L., Karg, T., Karl, M., Karle, A., Katil, A., Katz, U., Kauer, M., Kelley, J. L., Khanal, M., Zathul, A. Khatee, Kheirandish, A., Kiryluk, J., Klein, S. R., Kochocki, A., Koirala, R., Kolanoski, H., Kontrimas, T., Köpke, L., Kopper, C., Koskinen, D. J., Koundal, P., Kovacevich, M., Kowalski, M., Kozynets, T., Krishnamoorthi, J., Kruiswijk, K., Krupczak, E., Kumar, A., Kun, E., Kurahashi, N., Lad, N., Gualda, C. Lagunas, Lamoureux, M., Larson, M. J., Latseva, S., Lauber, F., Lazar, J. P., Lee, J. W., DeHolton, K. Leonard, Leszczyńska, A., Liao, J., Lincetto, M., Liu, Y. T., Liubarska, M., Lohfink, E., Love, C., Mariscal, C. J. Lozano, Lu, L., Lucarelli, F., Luszczak, W., Lyu, Y., Madsen, J., Magnus, E., Mahn, K. B. M., Makino, Y., Manao, E., Mancina, S., Sainte, W. Marie, Mariş, I. C., Marka, S., Marka, Z., Marsee, M., Martinez-Soler, I., Maruyama, R., Mayhew, F., McNally, F., Mead, J. V., Meagher, K., Mechbal, S., Medina, A., Meier, M., Merckx, Y., Merten, L., Micallef, J., Mitchell, J., Montaruli, T., Moore, R. W., Morii, Y., Morse, R., Moulai, M., Mukherjee, T., Naab, R., Nagai, R., Nakos, M., Naumann, U., Necker, J., Negi, A., Neste, L., Neumann, M., Niederhausen, H., Noda, K., Noell, A., Novikov, A., Pollmann, A. Obertacke, O'Dell, V., Oeyen, B., Olivas, A., Orsoe, R., Osborn, J., O'Sullivan, E., Pandya, H., Park, N., Parker, G. K., Paudel, E. N., Paul, L., Heros, C. Pérez de los, Pernice, T., Peterson, J., Philippen, S., Pizzuto, A., Plum, M., Pontén, A., Popovych, Y., Rodriguez, M. Prado, Pries, B., Procter-Murphy, R., Przybylski, G. T., Raab, C., Rack-Helleis, J., Ravn, M., Rawlins, K., Rechav, Z., Rehman, A., Reichherzer, P., Resconi, E., Reusch, S., Rhode, W., Riedel, B., Rifaie, A., Roberts, E. J., Robertson, S., Rodan, S., Roellinghoff, G., Rongen, M., Rosted, A., Rott, C., Ruhe, T., Ruohan, L., Ryckbosch, D., Safa, I., Saffer, J., Sampathkumar, P., Sandrock, A., Santander, M., Sarkar, S., Savelberg, J., Savina, P., Schaile, P., Schaufel, M., Schieler, H., Schindler, S., Schlüter, B., Schlüter, F., Schmeisser, N., Schmidt, T., Schneider, J., Schröder, F. G., Schumacher, L., Sclafani, S., Seckel, D., Seikh, M., Seo, M., Seunarine, S., Myhr, P. Sevle, Shah, R., Shefali, S., Shimizu, N., Silva, M., Skrzypek, B., Smithers, B., Snihur, R., Soedingrekso, J., Søgaard, A., Soldin, D., Soldin, P., Sommani, G., Spannfellner, C., Spiczak, G. M., Spiering, C., Stamatikos, M., Stanev, T., Stezelberger, T., Stürwald, T., Stuttard, T., Sullivan, G. W., Taboada, I., Ter-Antonyan, S., Terliuk, A., Thiesmeyer, M., Thompson, W. G., Thwaites, J., Tilav, S., Tönnis, C., Toscano, S., Tosi, D., Trettin, A., Turcotte, R., Twagirayezu, J. P., Elorrieta, M. A. Unland, Upadhyay, A. K., Upshaw, K., Vaidyanathan, A., Valtonen-Mattila, N., Vandenbroucke, J., van Eijndhoven, N., Vannerom, D., van Santen, J., Vara, J., Veitch-Michaelis, J., Venugopal, M., Vereecken, M., Verpoest, S., Veske, D., Vijai, A., Walck, C., Wang, A., Weaver, C., Weigel, P., Weindl, A., Weldert, J., Wen, A. Y., Wendt, C., Werthebach, J., Weyrauch, M., Whitehorn, N., Wiebusch, C. H., Williams, D. R., Witthaus, L., Wolf, A., Wolf, M., Wrede, G., Xu, X. W., Yanez, J. P., Yildizci, E., Yoshida, S., Young, R., Yu, S., Yuan, T., Zhang, Z., Zhelnin, P., Zilberman, P., and Zimmerman, M.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Galactic PeVatrons are sources that can accelerate cosmic rays to PeV energies. The high-energy cosmic rays are expected to interact with the surrounding ambient 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 multi-messenger analysis that combines gamma rays and neutrinos is required. In this study, we use the Multi-Mission Maximum Likelihood framework (3ML) with IceCube Maximum Likelihood Analysis software (i3mla) and HAWC Accelerated Likelihood (HAL) to search for a correlation between 22 known gamma-ray sources from the third HAWC gamma-ray catalog and 14 years 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 the gamma-ray emission from five of the sources can not be produced purely from hadronic interactions. We report the limit for the fraction of gamma rays produced by hadronic interactions for these five sources.

Published
2024

9. Latest Analysis Results from the KASCADE-Grande Data

Author

Kang, D., Arteaga-Velázquez, J. C., Bertaina, M., Chiavassa, A., Daumiller, K., de Souza, V., Engel, R., Gherghel-Lascu, A., Grupen, C., Haungs, A., Hörandel, J. R., Huege, T., Kampert, K. -H., Link, K., Mathes, H. J., Ostapchenko, S., Pierog, T., Rivera-Rangel, D., Roth, M., Schieler, H., Schröder, F. G., Sima, O., Weindl, A., Wochele, J., and Zabierowski, J.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

KASCADE-Grande, the extension of the multi-detector setup of KASCADE, was devoted to measure the properties of extensive air showers initiated by high-energy cosmic rays in the primary energy range of 1 PeV up to 1 EeV. The observations of the energy spectrum and mass composition of cosmic rays contribute with great detail to the understanding of the transition from galactic to extragalactic origin of cosmic rays, and furthermore to validate the properties of hadronic interaction models in the air shower development. Although the experiment is fully dismantled, the analysis of the entire KASCADE-Grande data set continues. We have recently investigated the impact of different post-LHC hadronic interaction models, QGSJETII-04, EPOS-LHC, Sibyll 2.3d, on air shower predictions in terms of the reconstructed spectra of heavy and light primary masses, including systematic uncertainties. In addition, the conversely discussed evolution of the muon content of high-energy air showers in the atmosphere is compared with the predictions of different interaction models. In this contribution, the latest results from the KASCADE-Grande measurements will be discussed., Comment: Presented at the 38th International Cosmic Ray Conference (ICRC2023). arXiv admin note: substantial text overlap with arXiv:2208.10229

Published
2023
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10. Cosmic-ray searches with the MATHUSLA detector

Author

Alpigiani, Cristiano, Arteaga-Velázquez, J. C., Blanco-Lira, Daniela, Boscherini, Davide, Caballero-Mora, K. S., Camarri, Paolo, Cardarelli, Roberto, Ramírez, Dennis Cazar, Di Sciascio, Giuseppe, Téllez, Arturo Fernández, Lubatti, H. J., Morales-Olivares, O. G., Mamani, Piter Amador Paye, Rangel, David Rivera, Rodríguez-Cahuantzi, Mario, Santonico, Rinaldo, and Vázquez, Martin Alfonso Subieta

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract

The performance of the proposed MATHUSLA detector as an instrument for studying the physics of cosmic rays by measuring extensive air showers is presented. The MATHUSLA detector is designed to observe and study the decay of long-lived particles produced at the pp interaction point of the CMS detector at CERN during the HL-LHC data-taking period. The proposed MATHUSLA detector will be composed of many layers of long scintillating bars that cannot measure more than one hit per bar and correctly report the hit coordinate in case of multiple hits. This study shows that adding a layer of RPC detectors with both analogue and digital readout significantly enhances the capabilities of MATHUSLA to measure the local densities and arrival times of charged particles at the front of air showers. We discuss open issues in cosmic-ray physics that the proposed MATHUSLA detector with an additional layer of RPC detectors could address and conclude by comparing with other air-shower facilities that measure cosmic rays in the PeV energy range., Comment: 64 pages, 58 figures

Published
2023

11. Galactic Gamma-Ray Diffuse Emission at TeV energies with HAWC Data

Author

Alfaro, R., Alvarez, C., Arteaga-Velazquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Babu, R., Baghmanyan, V., Belmont-Moreno, E., Brisbois, C., Caballero-Mora, K. S., Capistran, T., Carraminana, A., Casanova, S., Chaparro-Amaro, O., Cotti, U., Cotzomi, J., de Leon, S. Coutino, De la Fuente, E., Hernandez, R. Diaz, DuVernois, M. A., Durocher, M., Dıaz-Velez, J. C., Engel, K., Espinoza, C., Fan, K. L., Fraija, N., Galvan-Gamez, A., Garcıa-Gonzalez, J. A., Garfias, F., Gonzalez, M. M., Goodman, J. A., Hernandez, S., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Humensky, T. B., Iriarte, A., Joshi, V., Kaufmann, S., Kieda, D., Kunde, G. J., Lara, A., Vargas, H. Leon, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Martinez, O., Martınez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Moreno, E., Mostafa, M., Nayerhoda, A., Nellen, L., Noriega-Papaqui, R., Perez-Perez, E. G., Rosa-Gonzalez, D., Ruiz-Velasco, E., Salazar, H., Salazar-Gallegos, D., Greus, F. Salesa, Sandoval, A., Serna-Franco, J., Smith, A. J., Springer, R. W., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Urena-Mena, F., Villasenor, L., Willox, E., Zhou, H., de Leon, C., Fornieri, O., Gaggero, D., Grasso, D., Marinelli, A., and Ventura, S.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The Galactic gamma-ray diffuse emission (GDE) is emitted by cosmic rays (CRs), ultra-relativistic protons and electrons, interacting with gas and electromagnetic radiation fields in the interstellar medium. Here we present the analysis of TeV diffuse emission from a region of the Galactic Plane over the range in longitude of $l\in[43^\circ,73^\circ]$, using data collected with the High Altitude Water Cherenkov (HAWC) detector. Spectral, longitudinal and latitudinal distributions of the TeV diffuse emission are shown. The radiation spectrum is compatible with the spectrum of the emission arising from a CR population with an "index" similar to that of the observed CRs. When comparing with the \texttt{DRAGON} \textit{base model}, the HAWC GDE flux is higher by about a factor of two. Unresolved sources such as pulsar wind nebulae and TeV halos could explain the excess emission. Finally, deviations of the Galactic CR flux from the locally measured CR flux may additionally explain the difference between the predicted and measured diffuse fluxes.

Published
2023

12. Search for Decaying Dark Matter in the Virgo Cluster of Galaxies with HAWC

Author

Albert, A., Alfaro, R., Arteaga-Velázquez, J. C., Solares, H. A. Ayala, Babu, R., Belmont-Moreno, E., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotzomi, J., de León, S. Coutiño, Depaoli, D., Hernandez, R. Diaz, DuVernois, M. A., Durocher, M., Fraija, N., García-González, J. A., González, M. M., Goodman, J. A., Harding, J. P., Hernández-Cadena, S., Herzog, I., Huang, D., Hueyotl-Zahuantitla, F., Joshi, V., Kaufmann, S., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Mostafá, M., Nayerhoda, A., Nellen, L., Nisa, M. U., Noriega-Papaqui, R., Omodei, N., Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Schneider, M., Son, Y., Springer, R. W., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Villaseñor, L., Wang, X., Watson, I. J., and Yun-Cárcamo, S.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology
Abstract

The decay or annihilation of dark matter particles may produce a steady flux of very-high-energy gamma rays detectable above the diffuse background. Nearby clusters of galaxies provide excellent targets to search for the signatures of particle dark matter interactions. In particular, the Virgo cluster spans several degrees across the sky and can be efficiently probed with a wide field-of-view instrument. The High Altitude Water Cherenkov (HAWC) observatory, due to its wide field of view and sensitivity to gamma rays at an energy scale of 300 GeV--100 TeV is well-suited for this search. Using 2141 days of data, we search for gamma-ray emission from the Virgo cluster, assuming well-motivated dark matter sub-structure models. Our results provide some of the strongest constraints on the decay lifetime of dark matter for masses above 10 TeV., Comment: 7 pages, 3 figures. Accepted for publication in Physical Review D

Published
2023

13. An optimized search for dark matter in the galactic halo with HAWC

Author

Albert, A., Alfaro, R., Alvarez, C., Arteaga-Velazquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, Belmont-Moreno, E., Caballero-Mora, K. S., Capistran, T., Carraminana, A., Casanova, S., Chaparro-Amaro, O., Cotti, U., Cotzomi, J., De la Fuente, E., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Dıaz-Velez, J. C., Espinoza, C., Fan, K. L., Fraija, N., Garcıa-Gonzalez, J. A., Garfias, F., Gonzalez, M. M., Goodman, J. A., Harding, J. P., Huang, D., Hueyotl-Zahuantitla, F., Iriarte, A., Joshi, V., Kunde, G. J., Lee, J., Vargas, H. Leon, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., Malone, K., Martinez, O., Martınez-Castro, J., Matthews, J. A., Moreno, E., Mostafa, M., Nayerhoda, A., Nellen, L., Peisker, A., Perez-Perez, E. G., Rho, C. D., Rosa-Gonzalez, D., Salazar, H., Salazar-Gallegos, D., Sandoval, A., Serna-Franco, J., Springer, R. W., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Urena-Mena, F., Villasenor, L., Wang, X., Zhou, H., and de Leon, C.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Phenomenology
Abstract

The Galactic Halo is a key target for indirect dark matter detection. The High Altitude Water Cherenkov (HAWC) observatory is a high-energy (~300 GeV to >100 TeV) gamma-ray detector located in central Mexico. HAWC operates via the water Cherenkov technique and has both a wide field of view of 2 sr and a >95% duty cycle, making it ideal for analyses of highly extended sources. We made use of these properties of HAWC and a new background-estimation technique optimized for extended sources to probe a large region of the Galactic Halo for dark matter signals. With this approach, we set improved constraints on dark matter annihilation and decay between masses of 10 and 100 TeV. Due to the large spatial extent of the HAWC field of view, these constraints are robust against uncertainties in the Galactic dark matter spatial profile., Comment: 19 pages, 14 figures

Published
2023

14. A Contribution of the HAWC Observatory to the TeV era in the High Energy Gamma-Ray Astrophysics: The case of the TeV-Halos

Author

Torres-Escobedo, Ramiro, Zhou, Hao, de la Fuente, Eduardo, Abeysekara, A. U., Albert, A., Alfaro, R., Alvarez, C., Álvarez, J. D., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Babu, R., Baghmanyan, V., Barber, A. S., Gonzalez, J. Becerra, Belmont-Moreno, E., BenZvi, S. Y., Berley, D., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Chaparro-Amaro, O., Cotti, U., Cotzomi, J., de León, S. Coutiño, de León, C., Diaz-Cruz, L., Hernandez, R. Diaz, Díaz-Vélez, J. C., Dingus, B. L., Durocher, M., DuVernois, M. A., Ellsworth, R. W., Engel, K., Espinoza, C., Fan, K. L., Fang, K., Alonso, M. Fernández, Fick, B., Fleischhack, H., Flores, J. L., Fraija, N. I., Garcia, D., García-González, J. A., García-Torales, G., Garfias, F., Giacinti, G., Goksu, H., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Herzog, I., Hinton, J., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hui, C. M., Humensky, B., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Jhee, H., Joshi, V., Kieda, D., Kunde, G J., Kunwar, S., Lara, A., Lee, J., Lee, W. H., Lennarz, D., Vargas, H. León, Linnemann, J., Longinotti, A. L., López-Coto, R., Luis-Raya, G., Lundeen, J., Malone, K., Marandon, V., Martinez, O., Martinez-Castellanos, I., Martínez-Huerta, H., Martínez-Castro, J., Matthews, J. A. J., McEnery, J., 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., Rho, C. D., Rivière, C., Rosa-Gonzalez, D., Ruiz-Velasco, E., Ryan, J., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., Serna-Franco, J., Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Taboada, I., Tanner, M., Tollefson, K., Torres, I., Turner, R., Ureña-Mena, F., Villaseñor, L., Wang, X., Watson, I. J., Weisgarber, T., Werner, F., Willox, E., Wood, J., Yodh, G. B., and Zepeda, A.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

We present a short overview of the TeV-Halos objects as a discovery and a relevant contribution of the High Altitude Water \v{C}erenkov (HAWC) observatory to TeV astrophysics. We discuss history, discovery, knowledge, and the next step through a new and more detailed analysis than the original study in 2017. TeV-Halos will contribute to resolving the problem of the local positron excess observed on the Earth. To clarify the latter, understanding the diffusion process is mandatory., Comment: Work presented in the 21st International Symposium on Very High Energy Cosmic Ray Interactions(ISVHECRI 2022) as part of the Ph. D. Thesis of Ramiro Torres-Escobedo (SJTU, Shanghai, China). Accepted for publication in SciPost Physics Proceedings (ISSN 2666-4003). 11 pages, 3 Figures. Short overview of HAWC and TeV Halos objects until 2022

Published
2023

15. The High-Altitude Water Cherenkov (HAWC) Observatory in M\'exico: The Primary Detector

Author

Abeysekara, A. U., Albert, A., Alfaro, R., Álvarez, 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., Hernández, R. Díaz, 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, U. B., Fleischhack, H., Flores, J. L., Fraija, N., García-González, J. A., García-Torales, G., Garfias, F., Giacinti, G., Goksu, H., González, M. M., González-Muñoz, A., Goodman, J. A., Harding, J. P., Hernández, E., Hernández, 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., Martínez, 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.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The High-Altitude Water Cherenkov (HAWC) observatory is a second-generation continuously operated, wide field-of-view, TeV gamma-ray observatory. The HAWC observatory and its analysis techniques build on experience of the Milagro experiment in using ground-based water Cherenkov detectors for gamma-ray astronomy. HAWC is located on the Sierra Negra volcano in M\'exico at an elevation of 4100 meters above sea level. The completed HAWC observatory principal detector (HAWC) consists of 300 closely spaced water Cherenkov detectors, each equipped with four photomultiplier tubes to provide timing and charge information to reconstruct the extensive air shower energy and arrival direction. The HAWC observatory has been optimized to observe transient and steady emission from sources of gamma rays within an energy range from several hundred GeV to several hundred TeV. However, most of the air showers detected are initiated by cosmic rays, allowing studies of cosmic rays also to be performed. This paper describes the characteristics of the HAWC main array and its hardware., Comment: Accepted for publications in Nuclear Inst. and Methods in Physics Research, A (2023) 168253 ( https://www.sciencedirect.com/science/article/abs/pii/S0168900223002437 ); 39 pages, 14 Figures

Published
2023
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16. Detailed Analysis of the TeV {\gamma}-Ray Sources 3HWC J1928+178, 3HWC J1930+188, and the New Source HAWC J1932+192

Author

Albert, A., Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, Babu, R., Belmont-Moreno, E., Brisbois, C., Caballero-Mora, K. S., Capistrń, T., Carramiñana, A., Casanova, S., Chaparro-Amaro, O., Cotti, U., Cotzomi, J., CoutiñodeLeón, S., De la Fuente, E., de León, C., Hernandez, R. Diaz, Díaz-Vélez, J. C., Dingus, B. L., DuVernois, M. A., Durocher, M., Engel, K., Espinoza, C., Fan, K. L., Alonso, M. Fernández, Fraija, N., García-González, J. A., Garfias, F., Goksu, H., 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., Kaufmann, S., Kieda, D., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., López-Coto, R., Malone, K., Marandon, V., 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., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Salazar-Gallegos, D., Greus, F. Salesa, 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., Villaseñor, L., Wang, X., Werner, F., Willox, E., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The latest High Altitude Water Cherenkov (HAWC) point-like source catalog up to 56 TeV reported the detection of two sources in the region of the Galactic plane at galactic longitude 52\deg < l < 55\deg, 3HWC J1930+188 and 3HWC J1928+178. The first one is associated with a known TeV source, the supernova remnant SNR G054.1+00.3. It was discovered by one of the currently operating Imaging Atmospheric Cherenkov Telescope (IACT), the Very Energetic Radiation Imaging Telescope Array System (VERITAS), detected by the High Energy Stereoscopic System (H.E.S.S.), and identified as a composite SNR. However, the source 3HWC J1928+178, discovered by HAWC and coincident with the pulsar PSR J1928+1746, was not detected by any IACT despite their long exposure on the region, until a recent new analysis of H.E.S.S. data was able to confirm it. Moreover, no X-ray counterpart has been detected from this pulsar. We present a multicomponent fit of this region using the latest HAWC data. This reveals an additional new source, HAWC J1932+192, which is potentially associated with the pulsar PSR J1932+1916, whose gamma-ray emission could come from the acceleration of particles in its pulsar wind nebula. In the case of 3HWC J1928+178, several possible explanations are explored, in a attempt to unveil the origins of the very-high-energy gamma-ray emission.

Published
2023
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17. Searching for TeV Dark Matter in Irregular dwarf galaxies with HAWC Observatory

Author

Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, Babu, R., Belmont-Moreno, E., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Chaparro-Amaro, O., Cotti, U., Cotzomi, J., De la Fuente, E., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Espinoza, C., Fan, K. L., Fraija, N., García-González, J. A., Garfias, F., González, M. M., Harding, J. P., Hernández-Cadena, S., Huang, D., Hueyotl-Zahuantitla, F., Iriarte, A., Joshi, V., Kaufmann, S., Kieda, D., Lee, J., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Martinez, O., Martínez-Castro, J., Matthews, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Omodei, N., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Salazar, H., Salazar-Gallegos, D., Sandoval, A., Serna-Franco, J., Son, Y., Springer, R. W., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Villaseñor, L., Wang, X., Willox, E., Zhou, H., de León, C., Gammaldi, V., Karukes, E., and Salucci, P.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

We present the results of dark matter (DM) searches in a sample of 31 dwarf irregular (dIrr) galaxies within the field of view of the HAWC Observatory. dIrr galaxies are DM dominated objects, which astrophysical gamma-ray emission is estimated to be negligible with respect to the secondary gamma-ray flux expected by annihilation or decay of Weakly Interacting Massive Particles (WIMPs). While we do not see any statistically significant DM signal in dIrr galaxies, we present the exclusion limits ($95\%~\text{C.L.}$) for annihilation cross-section and decay lifetime for WIMP candidates with masses between $1$ and $100~\text{TeV}$. Exclusion limits from dIrr galaxies are relevant and complementary to benchmark dwarf Spheroidal (dSph) galaxies. In fact, dIrr galaxies are targets kinematically different from benchmark dSph, preserving the footprints of different evolution histories. We compare the limits from dIrr galaxies to those from ultrafaint and classical dSph galaxies previously observed with HAWC. We find that the contraints are comparable to the limits from classical dSph galaxies and $\thicksim2$ orders of magnitude weaker than the ultrafaint dSph limits., Comment: 22 pages, 11 figures, 3 tables

Published
2023
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18. HAWC Detection of a TeV Halo Candidate Surrounding a Radio-quiet pulsar

Author

Albert, A., Alfaro, R., Arteaga-Velázquez, J. C., Belmont-Moreno, E., Capistrán, T., Carramiñana, A., Casanova, S., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., Hernandez, R. Diaz, DuVernois, M. A., Díaz-Vélez, J. C., Espinoza, C., Fan, K. L., Fraija, N., Fang, K., García-González, J. A., Garfias, F., Jardin-Blicq, Armelle, González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Huang, D., Hueyotl-Zahuantitla, F., Iriarte, A., Joshi, V., Lara, A., Lee, J., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Martinez, O., Martínez-Castro, J., Matthews, J. A., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Schneider, M., Serna-Franco, J., Smith, A. J., Son, Y., Springer, R. W., Tollefson, K., Torres, I., Torres-Escobedo, R., Wang, X., Whitaker, K., Willox, E., Zhou, H., and de León, C.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Extended very-high-energy (VHE; 0.1-100 TeV) $\gamma$-ray emission has been observed around several middle-aged pulsars and referred to as ``TeV halos". Their formation mechanism remains under debate. It is also unknown whether they are ubiquitous or related to certain subgroup of pulsars. With 2321 days of observation, the High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory detected VHE $\gamma$-ray emission at the location of the radio-quiet pulsar PSR J0359+5414 with $>6\sigma$ significance. By performing likelihood tests with different spectral and spatial models and comparing the TeV spectrum with multi-wavelength observations of nearby sources, we show that this excess is consistent with a TeV halo associated with PSR J0359+5414, though future observation of HAWC and multi-wavelength follow-ups are needed to confirm this nature. This new halo candidate is located in a non-crowded region in the outer Galaxy. It shares similar properties to the other halos but its pulsar is younger and radio-quiet. Our observation implies that TeV halos could commonly exist around pulsars and their formation does not depend on the configuration of the pulsar magnetosphere.

Published
2023
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19. The TeV Sun Rises: Discovery of Gamma rays from the Quiescent Sun with HAWC

Author

Albert, A., Alfaro, R., Alvarez, C., Arteaga-Velazquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, Babu, R., Belmont-Moreno, E., Brisbois, C., Caballero-Mora, K. S., Capistran, T., Carraminana, A., Casanova, S., Chaparro-Amaro, O., Cotti, U., Cotzomi, J., de Leon, S. Coutino, De la Fuente, E., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Diaz-Velez, J. C., Ellsworth, R. W., Engel, K., Espinoza, C., Fan, K. L., Fang, K., Alonso, M. Fernandez, Fleischhack, H., Fraija, N., Garcia-Gonzalez, J. A., Garfia, F., Gonzalez, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hinton, J., Huang, D., Hueyotl-Zahuantitla, F., Huntemeyer, P., Iriarte, A., Joshi, V., Kaufmann, S., Lee, J., Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Martinez, O., Martinez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafa, M., Nayerhoda, A., Nellen, L., Nisa, M. U., Noriega-Papaqui, R., Olivera-Nieto, L., Omodei, N., Araujo, Y. Pérez, Perez-Perez, E. G., Rho, C. D., Rosa-Gonzalez, 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., Urena-Mena, F., Wang, X., Watson, I. J., Willox, E., Yun-Cárcamo, S., Zhou, H., de León, C., Beacom, J. F., Linden, T., Ng, K. C. Y., Peter, A. H. G., and Zhou, B.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics, High Energy Physics - Experiment
Abstract

We report the first detection of a TeV gamma-ray flux from the solar disk (6.3$\sigma$), based on 6.1 years of data from the High Altitude Water Cherenkov (HAWC) observatory. The 0.5--2.6 TeV spectrum is well fit by a power law, dN/dE = $A (E/1 \text{ TeV})^{-\gamma}$, with $A = (1.6 \pm 0.3) \times 10^{-12}$ TeV$^{-1}$ cm$^{-2}$ s$^{-1}$ and $\gamma = -3.62 \pm 0.14$. The flux shows a strong indication of anticorrelation with solar activity. These results extend the bright, hard GeV emission from the disk observed with Fermi-LAT, seemingly due to hadronic Galactic cosmic rays showering on nuclei in the solar atmosphere. However, current theoretical models are unable to explain the details of how solar magnetic fields shape these interactions. HAWC's TeV detection thus deepens the mysteries of the solar-disk emission., Comment: 15 pages, 8 figures including supplementary material. Accepted for publication in Physical Review Letters

Published
2022
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20. High Altitude characterization of the Hunga Pressure Wave with Cosmic Rays by the HAWC Observatory

Author

Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Babu, R., Belmont-Moreno, E., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Chaparro-Amaro, O., Cotzomi, J., De la Fuente, E., Hernandez, R. Diaz, DuVernois, M. A., Engel, K., Espinoza, C., Fan, K. L., Fraija, N., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Hernandez, S., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Joshi, V., Kaufmann, S., Lara, A., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Nellen, L., Noriega-Papaqui, R., Omodei, N., Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Sandoval, A., Schneider, M., Smith, A. J., Son, Y., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Varela, E., Villaseñor, L., Wang, X., Willox, E., Zhou, H., and de León, C.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment
Abstract

High-energy cosmic rays that hit the Earth can be used to study large-scale atmospheric perturbations. After a first interaction in the upper parts of the atmosphere, cosmic rays produce a shower of particles that sample the atmosphere down to the detector level. The HAWC (High-Altitude Water Cherenkov) cosmic-ray observatory in Central Mexico at 4,100 m elevation detects air shower particles continuously with 300 water Cherenkov detectors with an active area of 12,500 m$^{2}$. On January 15th, 2022, HAWC detected the passage of the pressure wave created by the explosion of the Hunga volcano in the Tonga islands, 9,000 km away, as an anomaly in the measured rate of shower particles. The HAWC measurements are used to characterize the shape of four pressure wave passages, determine the propagation speed of each one, and correlate the variations of the shower particle rates with the barometric pressure changes, extracting a barometric parameter. The profile of the shower particle rate and atmospheric pressure variations for the first transit of the pressure wave at HAWC is compared to the pressure measurements at Tonga island, near the volcanic explosion. This work opens the possibility of using large particle cosmic-ray air shower detectors to trace large atmospheric transient waves., Comment: Contact about this analysis: A. Sandoval (asandoval@fisica.unam.mx), A. Lara (alara@igeofisica.unam.mx) & H. Le\'on Vargas (hleonvar@fisica.unam.mx)

Published
2022

21. Search for Gamma-Ray and Neutrino Coincidences Using HAWC and ANTARES Data

Author

Solares, H. A. Ayala, Coutu, S., Cowen, D., Fox, D. B., Grégoire, T., McBride, F., Mostafá, M., Murase, K., Wissel, S., Albert, A., Alves, S., André, M., Ardid, M., Ardid, S., Aubert, J. -J., Aublin, J., Baret, B., Basa, S., Belhorma, B., Bendahman, M., Benfenati, F., Bertin, V., Biagi, S., Bissinger, M., Boumaaza, J., Bouta, M., Bouwhuis, M. C., Brânzaş, H., Bruijn, R., Brunner, J., Busto, J., Caiffi, B., Calvo, D., Capone, A., Caramete, L., Carr, J., Carretero, V., Celli, S., Chabab, M., Chau, T. N., Moursli, R. Cherkaoui El, Chiarusi, T., Circella, M., Coelho, J. A. B., Coleiro, A., Coniglione, R., Coyle, P., Creusot, A., Díaz, A. F., de Wasseige, G., De Martino, B., Distefano, C., Di Palma, I., Domi, A., Donzaud, C., Dornic, D., Drouhin, D., Eberl, T., van Eeden, T., van Eijk, D., Khayati, N. El, Enzenhöfer, A., Fermani, P., Ferrara, G., Filippini, F., Fusco, L., García, J., Gay, P., Glotin, H., Gozzini, R., Ruiz, R. Gracia, Graf, K., Guidi, C., Hallmann, S., van Haren, H., Heijboer, A. J., Hello, Y., Hernández-Rey, J. J., Hößl, J., Hofestädt, J., Huang, F., Illuminati, G., James, C. W., Jisse-Jung, B., de Jong, M., de Jong, P., Kadler, M., Kalekin, O., Katz, U., Kouchner, A., Kreykenbohm, I., Kulikovskiy, V., Lahmann, R., Lamoureux, M., Breton, R. Le, Lefèvre, D., Leonora, E., Levi, G., Stum, S. Le, Lopez-Coto, D., Loucatos, S., Maderer, L., Manczak, J., Marcelin, M., Margiotta, A., Marinelli, A., Martínez-Mora, J. A., Melis, K., Migliozzi, P., Moussa, A., Muller, R., Nauta, L., Navas, S., Nezri, E., Fearraigh, B. Ó, Păaun, A., Păvălaş, G. E., Pellegrino, C., Perrin-Terrin, M., Pestel, V., Piattelli, P., Pieterse, C., Poirè, C., Popa, V., Pradier, T., Randazzo, N., Real, D., Reck, S., Riccobene, G., Romanov, A., Sánchez-Losa, A., Samtleben, D. F. E., Sanguineti, M., Sapienza, P., Schnabel, J., Schumann, J., Schüssler, F., Seneca, J., Spurio, M., Stolarczyk, Th., Taiuti, M., Tayalati, Y., Tingay, S. J., Vallage, B., Van Elewyck, V., Versari, F., Viola, S., Vivolo, D., Wilms, J., Zavatarelli, S., Zegarelli, A., Zornoza, J. D., Zúñiga, J., Alvarez, C., Arteaga-Velázquez, J. C., Babu, R., Belmont-Moreno, E., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Chaparro-Amaro, O., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., de León, C., Hernandez, R. Diaz, DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Engel, K., Espinoza, C., Fan, K. L., Alonso, M. Fernández, Fraija, N., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Joshi, V., Kaufmann, S., Lara, A., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Nayerhoda, A., Nellen, L., Nisa, M. U., Noriega-Papaqui, R., Omodei, N., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Smith, A. J., Son, Y., Springer, R. W., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Varela, E., Wang, X., Whitaker, K., Willox, E., Zepeda, A., and Zhou, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

In the quest for high-energy neutrino sources, the Astrophysical Multimessenger Observatory Network (AMON) has implemented a new search by combining data from the High Altitude Water Cherenkov (HAWC) observatory and the Astronomy with a Neutrino Telescope and Abyss environmental RESearch (ANTARES) neutrino telescope. Using the same analysis strategy as in a previous detector combination of HAWC and IceCube data, we perform a search for coincidences in HAWC and ANTARES events that are below the threshold for sending public alerts in each individual detector. Data were collected between July 2015 and February 2020 with a livetime of 4.39 years. Over this time period, 3 coincident events with an estimated false-alarm rate of $< 1$ coincidence per year were found. This number is consistent with background expectations., Comment: 12 pages, 5 figures, 3 tables

Published
2022
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22. Limits on the Diffuse Gamma-Ray Background above 10 TeV with HAWC

Author

HAWC Collaboration, Albert, A., Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, 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., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Engel, K., Espinoza, C., Fan, K. L., Alonso, M. Fernández, Fraija, N., Garcia, D., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hinton, J., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Joshi, V., Kaufmann, S., Kieda, D., Lara, A., Lee, W. H., Vargas, H. León, 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., Omodei, N., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, 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., Villaseñor, L., Wang, X., Willox, E., Zhou, H., de León, C., and Álvarez, J. D.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The high-energy Diffuse Gamma-Ray Background (DGRB) is expected to be produced by unresolved isotropically distributed astrophysical objects, potentially including dark matter annihilation or decay emissions in galactic or extragalactic structures. The DGRB has only been observed below 1 TeV; above this energy, upper limits have been reported. Observations or stringent limits on the DGRB above this energy could have significant multi-messenger implications, such as constraining the origin of TeV-PeV astrophysical neutrinos detected by IceCube. The High Altitude Water Cherenkov (HAWC) Observatory, located in central Mexico at 4100 m above sea level, is sensitive to gamma rays from a few hundred GeV to several hundred TeV and continuously observes a wide field-of-view (2 sr). With its high-energy reach and large area coverage, HAWC is well-suited to notably improve searches for the DGRB at TeV energies. In this work, strict cuts have been applied to the HAWC dataset to better isolate gamma-ray air showers from background hadronic showers. The sensitivity to the DGRB was then verified using 535 days of Crab data and Monte Carlo simulations, leading to new limits above 10 TeV on the DGRB as well as prospective implications for multi-messenger studies., Comment: 8 pages, 3 figures

Published
2022

23. LOPES 3D -- studies on the benefits of EAS-radio measurements with vertically aligned antennas

Author

Huber, D., Apel, W. D., Arteaga-Velazquez, J. C., Bähren, L., Bekk, K., Bertaina, M., Biermann, P. L., Blümer, J., Bozdog, H., Brancus, I. M., Cantoni, E., Chiavassa, A., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Fuchs, B., Fuhrmann, D., Gemmeke, H., Grupen, C., Haungs, A., Heck, D., Hörandel, J. R., Horneffer, A., Huege, T., Isar, P. G., Kampert, K. -H., Kang, D., Krömer, O., Kuijpers, J., Link, K., Łuczak, P., Ludwig, M., Mathes, H. J., Melissas, M., Morello, C., Oehlschläger, J., Palmieri, N., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Rühle, C., Saftoiu, A., Schieler, H., Schmidt, A., Schoo, S., Schröder, F. G., Sima, O., Toma, G., Trinchero, G. C., Weindl, A., Wochele, J., Zabierowski, J., and Zensus, J. A.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

The LOPES experiment was a radio interferometer built at the existing air shower array KASCADE-Grande in Karlsruhe, Germany. The last configuration of LOPES was called LOPES 3D and consisted of ten tripole antennas. Each of these antennas consisted of three crossed dipoles east-west, north-south, and vertically aligned. With this, LOPES 3D had the unique possibility to study the benefits of measurements with vertically aligned antennas in the environment of the well understood and calibrated particle detector array KASCADE-Grande. The measurements with three spatially coincident antennas allows a redundant reconstruction of the electric field vector. Several methods to exploit the redundancy were developed and tested. Furthermore, for the first time in LOPES, the background noise could be studied polarization- and direction dependent. With LOPES 3D it could be demonstrated that radio detection reaches a higher efficiency for inclined showers when including measurements with vertically aligned antennas and that the vertical component gets more important for the measurement of inclined showers. In this contribution we discuss a weighting scheme for the best combination of three redundant reconstructed electric field vectors. Furthermore, we discuss the influence of these weighting schemes on the ability to reconstruct air showers using the radio method. We show an estimate of the radio efficiency for inclined showers with focus on the benefits of measurements with vertically aligned antennas and we present the direction dependent noise in the different polarizations., Comment: Submission to the proceedings of the ARENA2014 workshop, which unfortunately were never published; thus documented here for reference

Published
2022

24. The all-particle energy spectrum of cosmic rays from 10 TeV to 1 PeV measured with HAWC

Author

Morales-Soto, J. A. and Arteaga-Velázquez, J. C.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The HAWC observatory is an air-shower detector, which is designed to study both astrophysical gamma-rays in the TeV region and galactic cosmic rays in the energy interval from 1 TeV to 1 PeV. This energy regime is quite interesting for cosmic ray research, since indirect observations overlap with direct measurements, which offers the opportunity for cross calibration and studies of experimental systematic errors in both techniques. One quantity that could help for this purpose is the all-particle energy spectrum of cosmic rays. In this work, we present an update of HAWC measurements on the total cosmic-ray energy spectrum between 10 TeV and 1 PeV. The spectrum was obtained from an unfolding analysis of almost two years of HAWC's data, which was collected from January, 2018 to December, 2019. For the energy estimation, we employed the high-energy hadronic interaction model QGSJET-II-04. As in a previous work of HAWC, published in 2017, we observed the presence of a knee-like feature in the region of tens of TeV., Comment: Submission to SciPost

Published
2022

25. A measurement of the proton plus helium spectrum of cosmic rays in the TeV region with HAWC

Author

HAWC Collaboration, Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Belmont-Moreno, E., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., De la Fuente, E., Hernandez, R. Diaz, DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Espinoza, C., Fraija, N., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Joshi, V., Kieda, D., Kunde, G. J., Lara, A., Lee, W. H., Vargas, H. León, 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., Noriega-Papaqui, R., Omodei, N., Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Salazar, H., Greus, F. Salesa, Sandoval, A., Serna-Franco, J., Smith, A. J., Springer, R. W., Tollefson, K., Torres, I., Torres-Escobedo, R., Ureña-Mena, F., Villaseñor, L., Wang, X., Willox, E., Zhou, H., de León, C., Álvarez, J. D., Yodh, G. B., and Zepeda, A.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

HAWC is an air-shower detector designed to study TeV gamma and cosmic rays. The observatory is composed of a $22000 \, m^2$ array of $300$ water Cherenkov tanks ($4.5 \, m$ deep x $7.3 \, m$ diameter) with $4$ photomultipliers (PMT) each. The instrument registers the number of hit PMTs, the timing information and the total charge at the PMTs during the event. From these data, shower observables such as the arrival direction, the core position at ground, the lateral age and the primary energy are estimated. In this work, we study the distribution of the shower age vs the primary energy of a sample of shower data collected by HAWC from June 2015 to June 2019 and employ a shower-age cut based on predictions of QGSJET-II-04 to separate a subsample of events dominated by H and He primaries. Using these data and a dedicated analysis, we reconstruct the cosmic ray spectrum of H+He from $6$ to $158$ TeV, which shows the presence of a softening at around $24$ TeV with a statistical significance of $4.1\sigma$., Comment: 6 pages, 6 figures, Submission to SciPost Phys. Proc., ISVHECRI 2022 Conference Proceedings

Published
2022

26. Results from recent analysis of KASCADE-Grande data

Author

Kang, D., Arteaga-Velázquez, J. C., Bertaina, M., Chiavassa, A., Daumiller, K., de Souza, V., Engel, R., Gherghel-Lascu, A., Grupen, C., Haungs, A., Hörandel, J. R., Huege, T., Kampert, K. -H., Link, K., Mathes, H. J., Ostapchenko, S., Pierog, T., Rivera-Rangel, D., Roth, M., Schieler, H., Schröder, F. G., Sima, O., Weindl, A., Wochele, J., and Zabierowski, J.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

KASCADE and its extension array of KASCADE-Grande were devoted to measure individual air showers of cosmic rays in the primary energy range of 100 TeV to 1 EeV. The experiment has substantially contributed to investigate the energy spectrum and mass composition of cosmic rays in the transition region from galactic to extragalactic origin of cosmic rays as well as to quantify the characteristics of hadronic interaction models in the air shower development through validity tests using the multi-detector information from KASCADE-Grande. Although the data accumulation was completed in 2013, data analysis is still continuing. Recently, we investigated the reliability of the new hadronic interactions models of the SIBYLL version 2.3d only with the energy spectra from the KASCADE-Grande data. The evolution of the muon content of high energy air showers in the atmosphere is studied as well, using EPOS-LHC, SIBYLL 2.3, QGSJET-II-04 and SIBYLL 2.3c. In this talk, recent results from KASCADE-Grande and the update of the KASCADE Cosmic Ray Data Centre (KCDC) will be discussed., Comment: Submission to SciPost Phys. Proc

Published
2022

27. Constraints on the very high energy gamma-ray emission from short GRBs with HAWC

Author

Albert, A., Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Babu, R., Belmont-Moreno, 8 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 León, C., De la Fuente, E., Hernandez, R. Diaz, Dichiara, S., Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Engel, K., Espinoza, C., Fan, K. L., Fraija, N., Galván-Gámez, A., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Humensky, T. B., Hüntemeyer, P., Iriarte, A., Joshi, V., Kaufmann, S., Lara, A., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Marinelli, S. S., 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., Noriega-Papaqui, R., Peisker, A., c, Y. Pérez Araujo, Pérez-Pérez, E. G., Ren, Z., Rho, C. D., Rosa-González, D., Rosenberg, M., Sacahui, J. R., Salazar, H., Greus, F. Salesa, Sandoval, A., Serna-Franco, J., Smith, A. J., Springer, R. W., Surajbali, P., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Villaseñor, L., Wang, X., Willox, E., Zepeda, A., Zhou, H., and COLLABORATION, THE HAWC

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Many gamma-ray bursts (GRBs) have been observed from radio wavelengths, and a few at very-high energies (VHEs, > 100GeV). The HAWC gamma-ray observatory is well suited to study transient phenomena at VHEs due to its large field of view and duty cycle. These features allow for searches of VHE emission and can probe different model assumptions of duration and spectra. In this paper, we use data collected by HAWC between December 2014 and May 2020 to search for emission in the energy range from 80 to 800 GeV coming from a sample 47 short GRBs that triggered the Fermi, Swift and Konus satellites during this period. This analysis is optimized to search for delayed and extended VHE emission within the first 20 s of each burst. We find no evidence of VHE emission, either simultaneous or delayed, with respect to the prompt emission. Upper limits (90% confidence level) derived on the GRB fluence are used to constrain the synchrotron self-Compton forward-shock model. Constraints for the interstellar density as low as $10^{-2}$ cm$^{-3}$ are obtained when assuming z=0.3 for bursts with the highest keV-fluences such as GRB 170206A and GRB 181222841. Such a low density makes observing VHE emission mainly from the fast cooling regime challenging., Comment: 20 pages, 8 figures

Published
2022
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28. Gamma/Hadron Separation with the HAWC Observatory

Author

Alfaro, R., Alvarez, C., Álvarez, J. D., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, 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., 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., Alonso, M. Fernández, 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., Lara, G. J. Kundem A., Lee, W. H., Lee, J., Vargas, H. León, 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., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, Sandoval, A., Parkinson, P. M. Saz, 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.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The High Altitude Water Cherenkov (HAWC) gamma-ray observatory observes atmospheric showers produced by incident gamma rays and cosmic rays with energy from 300 GeV to more than 100 TeV. A crucial phase in analyzing gamma-ray sources using ground-based gamma-ray detectors like HAWC is to identify the showers produced by gamma rays or hadrons. The HAWC observatory records roughly 25,000 events per second, with hadrons representing the vast majority ($>99.9\%$) of these events. The standard gamma/hadron separation technique in HAWC uses a simple rectangular cut involving only two parameters. This work describes the implementation of more sophisticated gamma/hadron separation techniques, via machine learning methods (boosted decision trees and neural networks), and summarizes the resulting improvements in gamma/hadron separation obtained in HAWC., Comment: 35 pages, 9 figures, published in Nuclear Instruments and Methods in Physics Research Section A

Published
2022
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29. Cosmic ray spectrum of protons plus helium nuclei between 6 TeV and 158 TeV from HAWC data

Author

HAWC Collaboration, Albert, A., Alfaro, R., Alvarez, C., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Arunbabu, K. P., Rojas, D. Avila, Solares, H. A. Ayala, Belmont-Moreno, E., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., De la Fuente, E., Hernandez, R. Diaz, DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Espinoza, C., Fraija, N., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Joshi, V., Kieda, D., Kunde, G. J., Lara, A., Lee, W. H., Vargas, H. León, 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., Noriega-Papaqui, R., Omodei, N., Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Salazar, H., Greus, F. Salesa, Sandoval, A., Serna-Franco, J., Smith, A. J., Springer, R. W., Tollefson, K., Torres, I., Torres-Escobedo, R., Ureña-Mena, F., Villaseñor, L., Wang, X., Willox, E., Zhou, H., de León, C., Álvarez, J. D., Yodh, G. B., and Zepeda, A.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

A measurement with high statistics of the differential energy spectrum of light elements in cosmic rays, in particular, of primary H plus He nuclei, is reported. The spectrum is presented in the energy range from $6$ to $158$ TeV per nucleus. Data was collected with the High Altitude Water Cherenkov (HAWC) Observatory between June 2015 and June 2019. The analysis was based on a Bayesian unfolding procedure, which was applied on a subsample of vertical HAWC data that was enriched to $82\%$ of events induced by light nuclei. To achieve the mass separation, a cut on the lateral age of air shower data was set guided by predictions of CORSIKA/QGSJET-II-04 simulations. The measured spectrum is consistent with a broken power-law spectrum and shows a kneelike feature at around $E = 24.0^{+3.6}_{-3.1} $ TeV, with a spectral index $\gamma = -2.51 \pm 0.02$ before the break and with $\gamma = -2.83 \pm 0.02$ above it. The feature has a statistical significance of $4.1 \, \sigma$. Within systematic uncertainties, the significance of the spectral break is $0.8 \, \sigma$., Comment: 32 pages, 24 figures, published in Physical Review D

Published
2022
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30. Validation of standardized data formats and tools for ground-level particle-based gamma-ray observatories

Author

Albert, A., Alfaro, R., Arteaga-Velázquez, J. C., Solares, H. A. Ayala, 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., Hernandez, R. Diaz, DuVernois, M. A., Durocher, M., Espinoza, C., Fan, K. L., Alonso, M. Fernández, Fraija, N., García-González, J. A., Goksu, H., González, M. M., Goodman, J. A., Harding, J. P., Hinton, J., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Jardin-Blicq, A., Joshi, V., Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Marandon, V., Martinez, O., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Nisa, M. U., Noriega-Papaqui, R., Olivera-Nieto, L., Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar-Gallegos, D., Greus, F. Salesa, Sandoval, A., Schoorlemmer, H., Serna-Franco, J., Smith, A. J., Son, Y., Springer, R. W., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Villaseñor, L., Wang, X., Watson, I. J., Willox, E., Zhou, H., de León, C., Zepeda, A., Donath, A., and Funk, S.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

Ground-based gamma-ray astronomy is still a rather young field of research, with strong historical connections to particle physics. This is why most observations are conducted by experiments with proprietary data and analysis software, as it is usual in the particle physics field. However in recent years, this paradigm has been slowly shifting towards the development and use of open-source data formats and tools, driven by upcoming observatories such as the Cherenkov Telescope Array (CTA). In this context, a community-driven, shared data format (the gamma-astro-data-format or GADF) and analysis tools such as Gammapy and ctools have been developed. So far these efforts have been led by the IACT community, leaving out other types of ground-based gamma-ray instruments.We aim to show that the data from ground particle arrays, such as the High-Altitude Water Cherenkov (HAWC) observatory, is also compatible with the GADF and can thus be fully analysed using the related tools, in this case Gammapy. We reproduce several published HAWC results using Gammapy and data products compliant with GADF standard. We also illustrate the capabilities of the shared format and tools by producing a joint fit of the Crab spectrum including data from six different gamma-ray experiments. We find excellent agreement with the reference results, a powerful check of both the published results and the tools involved. The data from particle detector arrays such as the HAWC observatory can be adapted to the GADF and thus analysed with Gammapy. A common data format and shared analysis tools allow multi-instrument joint analysis and effective data sharing. Given the complementary nature of pointing and wide-field instruments, this synergy will be distinctly beneficial for the joint scientific exploitation of future observatories such as the Southern Wide-field Gamma-ray Observatory and CTA., Comment: Accepted by A&A

Published
2022
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31. $\gamma$-ray Emission from Classical Nova V392 Per: Measurements from Fermi and HAWC

Author

Albert, A., Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, Babu, R., Belmont-Moreno, E., Blochwitz, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Chaparro-Amaro, O., Cotti, U., Cotzomi, J., de León, E. De la Fuente. C. de León. S. Coutiño, Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Engel, K., Espinoza, C., Fan, K. L., Fang, K., Fraija, N., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hinton, J., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Joshi, V., Lara, A., Lee, W. H., Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Lundeen, J., Malone, K., Marandon, V., 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., Omodei, N., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar-Gallegos, D., Greus, F. Salesa, Serna-Franco, A. Sandoval. J., Smith, A. J., Son, Y., Springer, R. W., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Villaseñor, L., Wang, X., Willox, E., Zhou, A. Zepeda. H., Chomiuk, L., Aydi, E., Li, K. L., Metzger, B. D., and Vurm, I.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

This paper reports on the $\gamma$-ray properties of the 2018 Galactic nova V392 Per, spanning photon energies $\sim$0.1 GeV to 100 TeV by combining observations from the Fermi Gamma-ray Space Telescope and the HAWC Observatory. In one of the most rapidly evolving $\gamma$-ray signals yet observed for a nova, GeV $\gamma$ rays with a power law spectrum with index $\Gamma = 2.0 \pm 0.1$ were detected over eight days following V392 Per's optical maximum. HAWC observations constrain the TeV $\gamma$-ray signal during this time and also before and after. We observe no statistically significant evidence of TeV $\gamma$-ray emission from V392 Per, but present flux limits. Tests of the extension of the Fermi/LAT spectrum to energies above 5 TeV are disfavored by 2 standard deviations (95\%) or more. We fit V392 Per's GeV $\gamma$ rays with hadronic acceleration models, incorporating optical observations, and compare the calculations with HAWC limits., Comment: 18 pages, 14 figures; revised for referee comments; section 5 revised

Published
2022
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32. Study of the Very High Energy emission of M87 through its broadband spectral energy distribution

Author

HAWC Collaboration, Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, Belmont-Moreno, E., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., de León, C., Hernandez, R. Diaz, DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Espinoza, C., Fan, K. L., Alonso, M. Fernández, Fraija, N., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Joshi, V., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Martinez, O., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Noriega-Papaqui, R., Omodei, N., Peisker, A., Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Salazar, H., Salazar-Gallegos, D., Greus, F. Salesa, Sandoval, A., Serna-Franco, J., Son, Y., Springer, R. W., Tibolla, O., Tollefson, K., Torres, I., Ureña-Mena, F., Villaseñor, L., Wang, X., Willox, E., and Zepeda, A.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The radio galaxy M87 is the central dominant galaxy of the Virgo Cluster. Very High Energy (VHE,$\gtrsim 0.1$ TeV) emission, from M87 has been detected by Imaging Air Cherenkov Telescopes (IACTs ). Recently, marginal evidence for VHE long-term emission has also been observed by the High Altitude Water Cherenkov (HAWC) Observatory, a gamma ray and cosmic-ray detector array located in Puebla, Mexico. The mechanism that produces VHE emission in M87 remains unclear. This emission is originated in its prominent jet, which has been spatially resolved from radio to X-rays. In this paper, we constructed a spectral energy distribution from radio to gamma rays that is representative of the non-flaring activity of the source, and in order to explain the observed emission, we fit it with a lepto-hadronic emission model. We found that this model is able to explain non-flaring VHE emission of M87 as well as an orphan flare reported in 2005., Comment: submitted to ApJ

Published
2021

33. HAWC Study of the Ultra-High-Energy Spectrum of MGRO J1908+06

Author

HAWC Collaboration, Albert, A., Alfaro, R., Alvarez, C., Álvarez, J. D., Camacho, J. R. Angeles, Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, Babu, R., Belmont-Moreno, E., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., de León, C., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Engel, K., Espinoza, C., Fan, K. L., Fang, K., Alonso, M. Fernández, Fraija, N., Garcia, D., García-González, J. A., Garfias, F., Giacinti, G., Goksu, H., González, M. M., Goodman, J. A., Harding, J. P., Hinton, J., Hona, B., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kaufmann, S., Kieda, D., Lee, W. H., Lee, J., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Marandon, V., 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., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Schoorlemmer, H., 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., Villaseñor, L., Wang, X., Watson, I. J., Willox, E., Zepeda, A., Zhou, H., Li, M. Breuhaus H., and Zhang, H.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

We report TeV gamma-ray observations of the ultra-high-energy source MGRO J1908+06 using data from the High Altitude Water Cherenkov (HAWC) Observatory. This source is one of the highest-energy known gamma-ray sources, with emission extending past 200 TeV. Modeling suggests that the bulk of the TeV gamma-ray emission is leptonic in nature, driven by the energetic radio-faint pulsar PSR J1907+0602. Depending on what assumptions are included in the model, a hadronic component may also be allowed. Using the results of the modeling, we discuss implications for detection prospects by multi-messenger campaigns., Comment: accepted by ApJ, in press

Published
2021
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34. 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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35. Large-scale Cosmic-ray Anisotropies with 19 yr of Data from the Pierre Auger Observatory.

Author

Abdul Halim, A., Abreu, P., Aglietta, M., Allekotte, I., Almeida Cheminant, K., Almela, A., Aloisio, R., Alvarez-Muñiz, J., Ambrosone, A., Ammerman Yebra, J., Anastasi, G. A., Anchordoqui, L., Andrada, B., Andrade Dourado, L., Andringa, S., Apollonio, L., Aramo, C., Araújo Ferreira, P. R., Arnone, E., and Arteaga Velázquez, J. C.

Subjects
DIPOLE moments, POWER spectra, TIME management, PREDICTION models, OBSERVATORIES
Abstract

Results are presented for the measurement of large-scale anisotropies in the arrival directions of ultra–high-energy cosmic rays detected at the Pierre Auger Observatory during 19 yr of operation, prior to AugerPrime, the upgrade of the observatory. The 3D dipole amplitude and direction are reconstructed above 4 EeV in four energy bins. Besides the established dipolar anisotropy in R.A. above 8 EeV, the Fourier amplitude of the 8–16 EeV energy bin is now also above the 5 σ discovery level. No time variation of the dipole moment above 8 EeV is found, setting an upper limit to the rate of change of such variations of 0.3% yr−1 at the 95% confidence level. Additionally, the results for the angular power spectrum are shown, demonstrating no other statistically significant multipoles. The results for the equatorial dipole component down to 0.03 EeV are presented, using for the first time a data set obtained with a trigger that has been optimized for lower energies. Finally, model predictions are discussed and compared with observations, based on two source emission scenarios obtained in the combined fit of spectrum and composition above 0.6 EeV. [ABSTRACT FROM AUTHOR]

Published
2024
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36. 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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37. Exploring the Coronal Magnetic Field with Galactic Cosmic Rays: The Sun Shadow Observed by HAWC

Author

Alfaro, R., primary, Alvarez, C., additional, Arteaga-Velázquez, J. C., additional, Arunbabu, K. P., additional, Avila Rojas, D., additional, Babu, R., additional, Belmont-Moreno, E., additional, Caballero-Mora, K. S., additional, Capistrán, T., additional, Carramiñana, A., additional, Casanova, S., additional, Colín-Farias, P., additional, Cotti, U., additional, Cotzomi, J., additional, de León, S. Coutiño, additional, De la Fuente, E., additional, de León, C., additional, Depaoli, D., additional, Diaz Hernandez, R., additional, Díaz-Vélez, J. C., additional, Durocher, M., additional, DuVernois, M. A., additional, Engel, K., additional, Espinoza, C., additional, Fan, K. L., additional, Fraija, N., additional, García-González, J. A., additional, Garfias, F., additional, Gonzalez Muñoz, A., additional, González, M. M., additional, Goodman, J. A., additional, Harding, J. P., additional, Huang, D., additional, Hueyotl-Zahuantitla, F., additional, Iriarte, A., additional, Kaufmann, S., additional, Lara, A., additional, Lee, J., additional, León Vargas, H., additional, Longinotti, A. L., additional, Luis-Raya, G., additional, Malone, K., additional, Martinez, O., additional, Martínez-Castro, J., additional, Matthews, J. A., additional, Miranda-Romagnoli, P., additional, Moreno, E., additional, Mostafá, M., additional, Nayerhoda, A., additional, Nellen, L., additional, Niembro, T., additional, Noriega-Papaqui, R., additional, Omodei, N., additional, Pérez-Pérez, E. G., additional, Rho, C. D., additional, Rosa-González, D., additional, Ruiz-Velasco, E., additional, Ryan, J., additional, Salazar, H., additional, Salazar-Gallegos, D., additional, Sandoval, A., additional, Serna-Franco, J., additional, Smith, A. J., additional, Son, Y., additional, Springer, R. W., additional, Tibolla, O., additional, Tollefson, K., additional, Torres, I., additional, Turner, R., additional, Ureña-Mena, F., additional, Varela, E., additional, Villaseñor, L., additional, Wang, X., additional, Watson, I. J., additional, Willox, E., additional, Yun-Cárcamo, S., additional, and Zhou, H., additional

Published
2024
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39. The energy spectrum of cosmic rays beyond the turn-down around 1017 eV as measured with the surface detector of the Pierre Auger Observatory

Author

Abreu, P., Aglietta, M., Albury, J. M., Allekotte, I., Almela, A., Alvarez-Muñiz, J., Alves Batista, R., Anastasi, G. A., Anchordoqui, L., Andrada, B., Andringa, S., Aramo, C., Araújo Ferreira, P. R., Arteaga Velázquez, J. C., Asorey, H., Assis, P., Avila, G., Badescu, A. M., Bakalova, A., Balaceanu, A., Barbato, F., Barreira Luz, R. J., Becker, K. H., Bellido, J. A., Berat, C., Bertaina, M. E., Bertou, X., Biermann, P. L., Billoir, P., Binet, V., Bismark, K., Bister, T., Biteau, J., Blazek, J., Bleve, C., Boháčová, M., Boncioli, D., Bonifazi, C., Bonneau Arbeletche, L., Borodai, N., Botti, A. M., Brack, J., Bretz, T., Brichetto Orchera, P. G., Briechle, F. L., Buchholz, P., Bueno, A., Buitink, S., Buscemi, M., Büsken, M., Caballero-Mora, K. S., Caccianiga, L., Canfora, F., Caracas, I., Carceller, J. M., Caruso, R., Castellina, A., Catalani, F., Cataldi, G., Cazon, L., Cerda, M., Chinellato, J. A., Chudoba, J., Chytka, L., Clay, R. W., Cobos Cerutti, A. C., Colalillo, R., Coleman, A., Coluccia, M. R., Conceição, R., Condorelli, A., Consolati, G., Contreras, F., Convenga, F., Correia dos Santos, D., Covault, C. E., Dasso, S., Daumiller, K., Dawson, B. R., Day, J. A., de Almeida, R. M., de Jesús, J., de Jong, S. J., De Mauro, G., de Mello Neto, J. R. T., De Mitri, I., de Oliveira, J., de Oliveira Franco, D., de Palma, F., de Souza, V., De Vito, E., del Río, M., Deligny, O., Di Matteo, A., Dobrigkeit, C., D’Olivo, J. C., Domingues Mendes, L. M., dos Anjos, R. C., dos Santos, D., Dova, M. T., Ebr, J., Engel, R., Epicoco, I., Erdmann, M., Escobar, C. O., Etchegoyen, A., Falcke, H., Farmer, J., Farrar, G., Fauth, A. C., Fazzini, N., Feldbusch, F., Fenu, F., Fick, B., Figueira, J. M., Filipčič, A., Fitoussi, T., Fodran, T., Freire, M. M., Fujii, T., Fuster, A., Galea, C., Galelli, C., García, B., Garcia Vegas, A. L., Gemmeke, H., Gesualdi, F., Gherghel-Lascu, A., Ghia, P. L., Giaccari, U., Giammarchi, M., Glombitza, J., Gobbi, F., Gollan, F., Golup, G., Gómez Berisso, M., Gómez Vitale, P. F., Gongora, J. P., González, J. M., González, N., Goos, I., Góra, D., Gorgi, A., Gottowik, M., Grubb, T. D., Guarino, F., Guedes, G. P., Guido, E., Hahn, S., Hamal, P., Hampel, M. R., Hansen, P., Harari, D., Harvey, V. M., Haungs, A., Hebbeker, T., Heck, D., Hill, G. C., Hojvat, C., Hörandel, J. R., Horvath, P., Hrabovský, M., Huege, T., Insolia, A., Isar, P. G., Janecek, P., Johnsen, J. A., Jurysek, J., Kääpä, A., Kampert, K. H., Karastathis, N., Keilhauer, B., Kemp, J., Khakurdikar, A., Kizakke Covilakam, V. V., Klages, H. O., Kleifges, M., Kleinfeller, J., Köpke, M., Kunka, N., Lago, B. L., Lang, R. G., Langner, N., Leigui de Oliveira, M. A., Lenok, V., Letessier-Selvon, A., Lhenry-Yvon, I., Lo Presti, D., Lopes, L., López, R., Lu, L., Luce, Q., Lundquist, J. P., Machado Payeras, A., Mancarella, G., Mandat, D., Manning, B. C., Manshanden, J., Mantsch, P., Marafico, S., Mariazzi, A. G., Mariş, I. C., Marsella, G., Martello, D., Martinelli, S., Martinez, H., Martínez Bravo, O., Mastrodicasa, M., Mathes, H. J., Matthews, J., Matthiae, G., Mayotte, E., Mazur, P. O., Medina-Tanco, G., Melo, D., Menshikov, A., Merenda, K.-D., Michal, S., Micheletti, M. I., Miramonti, L., Mockler, D., Mollerach, S., Montanet, F., Morello, C., Mostafá, M., Müller, A. L., Muller, M. A., Mulrey, K., Mussa, R., Muzio, M., Namasaka, W. M., Nasr-Esfahani, A., Nellen, L., Niculescu-Oglinzanu, M., Niechciol, M., Nitz, D., Nosek, D., Novotny, V., Nožka, L., Nucita, A., Núñez, L. A., Palatka, M., Pallotta, J., Papenbreer, P., Parente, G., Parra, A., Pawlowsky, J., Pech, M., Pedreira, F., Pȩkala, J., Pelayo, R., Peña-Rodriguez, J., Pereira Martins, E. E., Perez Armand, J., Pérez Bertolli, C., Perlin, M., Perrone, L., Petrera, S., Pierog, T., Pimenta, M., Pirronello, V., Platino, M., Pont, B., Pothast, M., Privitera, P., Prouza, M., Puyleart, A., Querchfeld, S., Rautenberg, J., Ravignani, D., Reininghaus, M., Ridky, J., Riehn, F., Risse, M., Rizi, V., Rodrigues de Carvalho, W., Rodriguez Rojo, J., Roncoroni, M. J., Roth, M., Roulet, E., Rovero, A. C., Ruehl, P., Saffi, S. J., Saftoiu, A., Salamida, F., Salazar, H., Salina, G., Sanabria Gomez, J. D., Sánchez, F., Santos, E. M., Santos, E., Sarazin, F., Sarmento, R., Sarmiento-Cano, C., Sato, R., Savina, P., Schäfer, C. M., Scherini, V., Schieler, H., Schimassek, M., Schimp, M., Schlüter, F., Schmidt, D., Scholten, O., Schovánek, P., Schröder, F. G., Schröder, S., Schulte, J., Schulz, A., Sciutto, S. J., Scornavacche, M., Segreto, A., Sehgal, S., Shellard, R. C., Sigl, G., Silli, G., Sima, O., Šmída, R., Sommers, P., Soriano, J. F., Souchard, J., Squartini, R., Stadelmaier, M., Stanca, D., Stanič, S., Stasielak, J., Stassi, P., Streich, A., Suárez-Durán, M., Sudholz, T., Suomijärvi, T., Supanitsky, A. D., Szadkowski, Z., Tapia, A., Taricco, C., Timmermans, C., Tkachenko, O., Tobiska, P., Todero Peixoto, C. J., Tomé, B., Torrès, Z., Travaini, A., Travnicek, P., Trimarelli, C., Tueros, M., Ulrich, R., Unger, M., Vaclavek, L., Vacula, M., Valdés Galicia, J. F., Valore, L., Varela, E., Vásquez-Ramírez, A., Veberič, D., Ventura, C., Vergara Quispe, I. D., Verzi, V., Vicha, J., Vink, J., Vorobiov, S., Wahlberg, H., Watanabe, C., Watson, A. A., Weber, M., Weindl, A., Wiencke, L., Wilczyński, H., Wirtz, M., Wittkowski, D., Wundheiler, B., Yushkov, A., Zapparrata, O., Zas, E., Zavrtanik, D., Zavrtanik, M., and Zehrer, L.

Published
2021
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40. Search for photons above 1019 eV with the surface detector of the Pierre Auger Observatory

Author

Abreu, P., Aglietta, M., Allekotte, I., Almeida Cheminant, K., Almela, A., Alvarez-Muñiz, J., Ammerman Yebra, J., Anastasi, G. A., Anchordoqui, L., Andrada, B., Andringa, S., Aramo, C., Araújo Ferreira, P. R., Arnone, E., Arteaga Velázquez, J. C., Asorey, H., Assis, P., Avila, G., Avocone, E., Badescu, A. M., Bakalova, A., Balaceanu, A., Barbato, F., Bellido, J. A., Berat, C., Bertaina, M. E., Bhatta, G., Biermann, P. L., Binet, V., Bismark, K., Bister, T., Biteau, J., Blazek, J., Bleve, C., Blümer, J., Boháčová, M., Boncioli, D., Bonifazi, C., Bonneau Arbeletche, L., Borodai, N., Brack, J., Bretz, T., Brichetto Orchera, P. G., Briechle, F. L., Buchholz, P., Bueno, A., Buitink, S., Buscemi, M., Büsken, M., Bwembya, A., Caballero-Mora, K. S., Caccianiga, L., Caracas, I., Caruso, R., Castellina, A., Catalani, F., Cataldi, G., Cazon, L., Cerda, M., Chinellato, J. A., Chudoba, J., Chytka, L., Clay, R. W., Cobos Cerutti, A. C., Colalillo, R., Coleman, A., Coluccia, M. R., Conceição, R., Condorelli, A., Consolati, G., Contreras, F., Convenga, F., Correia Dos Santos, D., Covault, C. E., Cristinziani, M., Dasso, S., Daumiller, K., Dawson, B. R., De Almeida, R. M., De Jesús, J., De Jong, S. J., De Mello Neto, J. R. T., De Mitri, I., De Oliveira, J., De Oliveira Franco, D., De Palma, F., De Souza, V., De Vito, E., Del Popolo, A., Deligny, O., Deval, L., Di Matteo, A., Dobre, M., Dobrigkeit, C., D'Olivo, J. C., Domingues Mendes, L. M., Dos Anjos, R. C., Ebr, J., Eman, M., Engel, R., Epicoco, I., Erdmann, M., Escobar, C. O., Etchegoyen, A., Falcke, H., Farmer, J., Farrar, G., Fauth, A. C., Fazzini, N., Feldbusch, F., Fenu, F., Fick, B., Figueira, J. M., Filipčič, A., Fitoussi, T., Fodran, T., Fujii, T., Fuster, A., Galea, C., Galelli, C., García, B., Gemmeke, H., Gesualdi, F., Gherghel-Lascu, A., Ghia, P. L., Giaccari, U., Giammarchi, M., Glombitza, J., Gobbi, F., Gollan, F., Golup, G., Gómez Berisso, M., Gómez Vitale, P. F., Gongora, J. P., González, J. M., González, N., Goos, I., Góra, D., Gorgi, A., Gottowik, M., Grubb, T. D., Guarino, F., Guedes, G. P., Guido, E., Hahn, S., Hamal, P., Hampel, M. R., Hansen, P., Harari, D., Harvey, V. M., Haungs, A., Hebbeker, T., Heck, D., Hojvat, C., Hörandel, J. R., Horvath, P., Hrabovský, M., Huege, T., Insolia, A., Isar, P. G., Janecek, P., Johnsen, J. A., Jurysek, J., Kääpä, A., Kampert, K. H., Keilhauer, B., Khakurdikar, A., Kizakke Covilakam, V. V., Klages, H. O., Kleifges, M., Kleinfeller, J., Knapp, F., Krohm, N., Kunka, N., Lago, B. L., Langner, N., Leigui De Oliveira, M. A., Lenok, V., Letessier-Selvon, A., Lhenry-Yvon, I., Lo Presti, D., Lopes, L., López, R., Lu, L., Luce, Q., Lundquist, J. P., Machado Payeras, A., Mancarella, G., Mandat, D., Manning, B. C., Manshanden, J., Mantsch, P., Marafico, S., Mariani, F. M., Mariazzi, A. G., Mariş, I. C., Marsella, G., Martello, D., Martinelli, S., Martínez Bravo, O., Martins, M. A., Mastrodicasa, M., Mathes, H. J., Matthews, J., Matthiae, G., Mayotte, E., Mayotte, S., Mazur, P. O., Medina-Tanco, G., Melo, D., Menshikov, A., Michal, S., Micheletti, M. I., Miramonti, L., Mollerach, S., Montanet, F., Morejon, L., Morello, C., Müller, A. L., Mulrey, K., Mussa, R., Muzio, M., Namasaka, W. M., Nasr-Esfahani, A., Nellen, L., Nicora, G., Niculescu-Oglinzanu, M., Niechciol, M., Nitz, D., Norwood, I., Nosek, D., Novotny, V., Nožka, L., Nucita, A., Núñez, L. A., Oliveira, C., Palatka, M., Pallotta, J., Papenbreer, P., Parente, G., Parra, A., Pawlowsky, J., Pech, M., Pȩkala, J., Pelayo, R., Pereira Martins, E. E., Perez Armand, J., Pérez Bertolli, C., Perrone, L., Petrera, S., Petrucci, C., Pierog, T., Pimenta, M., Platino, M., Pont, B., Pothast, M., Pourmohammad Shavar, M., Privitera, P., Prouza, M., Puyleart, A., Querchfeld, S., Rautenberg, J., Ravignani, D., Reininghaus, M., Ridky, J., Riehn, F., Risse, M., Rizi, V., Rodrigues De Carvalho, W., Rodriguez Rojo, J., Roncoroni, M. J., Rossoni, S., Roth, M., Roulet, E., Rovero, A. C., Ruehl, P., Saftoiu, A., Saharan, M., Salamida, F., Salazar, H., Salina, G., Sanabria Gomez, J. D., Sánchez, F., Santos, E. M., Santos, E., Sarazin, F., Sarmento, R., Sato, R., Savina, P., Schäfer, C. M., Scherini, V., Schieler, H., Schimassek, M., Schimp, M., Schlüter, F., Schmidt, D., Scholten, O., Schoorlemmer, H., Schovánek, P., Schröder, F. G., Schulte, J., Schulz, T., Sciutto, S. J., Scornavacche, M., Segreto, A., Sehgal, S., Shivashankara, S. U., Sigl, G., Silli, G., Sima, O., Smau, R., Šmída, R., Sommers, P., Soriano, J. F., Squartini, R., Stadelmaier, M., Stanca, D., Stanič, S., Stasielak, J., Stassi, P., Straub, M., Streich, A., Suárez-Durán, M., Sudholz, T., Suomijärvi, T., Supanitsky, A. D., Szadkowski, Z., Tapia, A., Taricco, C., Timmermans, C., Tkachenko, O., Tobiska, P., Todero Peixoto, C. J., Tomé, B., Torrès, Z., Travaini, A., Travnicek, P., Trimarelli, C., Tueros, M., Ulrich, R., Unger, M., Vaclavek, L., Vacula, M., Valdés Galicia, J. F., Valore, L., Varela, E., Vásquez-Ramírez, A., Veberič, D., Ventura, C., Vergara Quispe, I. D., Verzi, V., Vicha, J., Vink, J., Vorobiov, S., Watanabe, C., Watson, A. A., Weindl, A., Wiencke, L., Wilczyński, H., Wittkowski, D., Wundheiler, B., Yushkov, A., Zapparrata, O., Zas, E., Zavrtanik, D., Zavrtanik, M., Zehrer, L., Abreu, P., Aglietta, M., Allekotte, I., Almeida Cheminant, K., Almela, A., Alvarez-Muniz, J., Ammerman Yebra, J., Anastasi, G. A., Anchordoqui, L., Andrada, B., Andringa, S., Aramo, C., Araujo Ferreira, P. R., Arnone, E., Arteaga Velazquez, J. C., Asorey, H., Assis, P., Avila, G., Avocone, E., Badescu, A. M., Bakalova, A., Balaceanu, A., Barbato, F., Bellido, J. A., Berat, C., Bertaina, M. E., Bhatta, G., Biermann, P. L., Binet, V., Bismark, K., Bister, T., Biteau, J., Blazek, J., Bleve, C., Blumer, J., Bohacova, M., Boncioli, D., Bonifazi, C., Bonneau Arbeletche, L., Borodai, N., Brack, J., Bretz, T., Brichetto Orchera, P. G., Briechle, F. L., Buchholz, P., Bueno, A., Buitink, S., Buscemi, M., Busken, M., Bwembya, A., Caballero-Mora, K. S., Caccianiga, L., Caracas, I., Caruso, R., Castellina, A., Catalani, F., Cataldi, G., Cazon, L., Cerda, M., Chinellato, J. A., Chudoba, J., Chytka, L., Clay, R. W., Cobos Cerutti, A. C., Colalillo, R., Coleman, A., Coluccia, M. R., Conceicao, R., Condorelli, A., Consolati, G., Contreras, F., Convenga, F., Correia Dos Santos, D., Covault, C. E., Cristinziani, M., Dasso, S., Daumiller, K., Dawson, B. R., De Almeida, R. M., De Jesus, J., De Jong, S. J., De Mello Neto, J. R. T., De Mitri, I., De Oliveira, J., De Oliveira Franco, D., De Palma, F., De Souza, V., De Vito, E., Del Popolo, A., Deligny, O., Deval, L., Di Matteo, A., Dobre, M., Dobrigkeit, C., D'Olivo, J. C., Domingues Mendes, L. M., Dos Anjos, R. C., Ebr, J., Eman, M., Engel, R., Epicoco, I., Erdmann, M., Escobar, C. O., Etchegoyen, A., Falcke, H., Farmer, J., Farrar, G., Fauth, A. C., Fazzini, N., Feldbusch, F., Fenu, F., Fick, B., Figueira, J. M., Filipcic, A., Fitoussi, T., Fodran, T., Fujii, T., Fuster, A., Galea, C., Galelli, C., Garcia, B., Gemmeke, H., Gesualdi, F., Gherghel-Lascu, A., Ghia, P. L., Giaccari, U., Giammarchi, M., Glombitza, J., Gobbi, F., Gollan, F., Golup, G., Gomez Berisso, M., Gomez Vitale, P. F., Gongora, J. P., Gonzalez, J. M., Gonzalez, N., Goos, I., Gora, D., Gorgi, A., Gottowik, M., Grubb, T. D., Guarino, F., Guedes, G. P., Guido, E., Hahn, S., Hamal, P., Hampel, M. R., Hansen, P., Harari, D., Harvey, V. M., Haungs, A., Hebbeker, T., Heck, D., Hojvat, C., Horandel, J. R., Horvath, P., Hrabovsky, M., Huege, T., Insolia, A., Isar, P. G., Janecek, P., Johnsen, J. A., Jurysek, J., Kaapa, A., Kampert, K. H., Keilhauer, B., Khakurdikar, A., Kizakke Covilakam, V. V., Klages, H. O., Kleifges, M., Kleinfeller, J., Knapp, F., Krohm, N., Kunka, N., Lago, B. L., Langner, N., Leigui De Oliveira, M. A., Lenok, V., Letessier-Selvon, A., Lhenry-Yvon, I., Lo Presti, D., Lopes, L., Lopez, R., Lu, L., Luce, Q., Lundquist, J. P., Machado Payeras, A., Mancarella, G., Mandat, D., Manning, B. C., Manshanden, J., Mantsch, P., Marafico, S., Mariani, F. M., Mariazzi, A. G., Maris, I. C., Marsella, G., Martello, D., Martinelli, S., Martinez Bravo, O., Martins, M. A., Mastrodicasa, M., Mathes, H. J., Matthews, J., Matthiae, G., Mayotte, E., Mayotte, S., Mazur, P. O., Medina-Tanco, G., Melo, D., Menshikov, A., Michal, S., Micheletti, M. I., Miramonti, L., Mollerach, S., Montanet, F., Morejon, L., Morello, C., Muller, A. L., Mulrey, K., Mussa, R., Muzio, M., Namasaka, W. M., Nasr-Esfahani, A., Nellen, L., Nicora, G., Niculescu-Oglinzanu, M., Niechciol, M., Nitz, D., Norwood, I., Nosek, D., Novotny, V., Noa3/4ka, L., Nucita, A., Nunez, L. A., Oliveira, C., Palatka, M., Pallotta, J., Papenbreer, P., Parente, G., Parra, A., Pawlowsky, J., Pech, M., Pekala, J., Pelayo, R., Pereira Martins, E. E., Perez Armand, J., Perez Bertolli, C., Perrone, L., Petrera, S., Petrucci, C., Pierog, T., Pimenta, M., Platino, M., Pont, B., Pothast, M., Pourmohammad Shavar, M., Privitera, P., Prouza, M., Puyleart, A., Querchfeld, S., Rautenberg, J., Ravignani, D., Reininghaus, M., Ridky, J., Riehn, F., Risse, M., Rizi, V., Rodrigues De Carvalho, W., Rodriguez Rojo, J., Roncoroni, M. J., Rossoni, S., Roth, M., Roulet, E., Rovero, A. C., Ruehl, P., Saftoiu, A., Saharan, M., Salamida, F., Salazar, H., Salina, G., Sanabria Gomez, J. D., Sanchez, F., Santos, E. M., Santos, E., Sarazin, F., Sarmento, R., Sato, R., Savina, P., Schafer, C. M., Scherini, V., Schieler, H., Schimassek, M., Schimp, M., Schluter, F., Schmidt, D., Scholten, O., Schoorlemmer, H., Schovanek, P., Schroder, F. G., Schulte, J., Schulz, T., Sciutto, S. J., Scornavacche, M., Segreto, A., Sehgal, S., Shivashankara, S. U., Sigl, G., Silli, G., Sima, O., Smau, R., Smida, R., Sommers, P., Soriano, J. F., Squartini, R., Stadelmaier, M., Stanca, D., Stanic, S., Stasielak, J., Stassi, P., Straub, M., Streich, A., Suarez-Duran, M., Sudholz, T., Suomijarvi, T., Supanitsky, A. D., Szadkowski, Z., Tapia, A., Taricco, C., Timmermans, C., Tkachenko, O., Tobiska, P., Todero Peixoto, C. J., Tome, B., Torres, Z., Travaini, A., Travnicek, P., Trimarelli, C., Tueros, M., Ulrich, R., Unger, M., Vaclavek, L., Vacula, M., Valdes Galicia, J. F., Valore, L., Varela, E., Vasquez-Ramirez, A., Veberic, D., Ventura, C., Vergara Quispe, I. D., Verzi, V., Vicha, J., Vink, J., Vorobiov, S., Watanabe, C., Watson, A. A., Weindl, A., Wiencke, L., Wilczynski, H., Wittkowski, D., Wundheiler, B., Yushkov, A., Zapparrata, O., Zas, E., Zavrtanik, D., Zavrtanik, M., and Zehrer, L.

Subjects
Astronomy, Experimental High Energy Physics, Astronomy and Astrophysics, High Energy Physics, ddc:620, cosmic ray experiments, gamma ray detectors, ultra high energy cosmic rays, ultra high energy photons and neutrinos, Engineering & allied operations
Abstract

We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by photons with an energy above 1019 eV. Photons in the zenith angle range from 30∘ to 60∘ can be identified in the overwhelming background of showers initiated by charged cosmic rays through the broader time structure of the signals induced in the water-Cherenkov detectors of the array and the steeper lateral distribution of shower particles reaching ground. Applying the search method to data collected between January 2004 and June 2020, upper limits at 95% CL are set to an E-2 diffuse flux of ultra-high energy photons above 1019 eV, 2 × 1019 eV and 4 × 1019 eV amounting to 2.11 × 10-3, 3.12 × 10-4 and 1.72 × 10-4 km-2 sr-1 yr-1, respectively. While the sensitivity of the present search around 2 × 1019 eV approaches expectations of cosmogenic photon fluxes in the case of a pure-proton composition, it is one order of magnitude above those from more realistic mixed-composition models. The inferred limits have also implications for the search of super-heavy dark matter that are discussed and illustrated.

Published
2023

41. Search for Ultra-high-energy Photons from Gravitational Wave Sources with the Pierre Auger Observatory

Author

Abdul Halim, A., primary, Abreu, P., additional, Aglietta, M., additional, Allekotte, I., additional, Almeida Cheminant, K., additional, Almela, A., additional, Alvarez-Muñiz, J., additional, Ammerman Yebra, J., additional, Anastasi, G. A., additional, Anchordoqui, L., additional, Andrada, B., additional, Andringa, S., additional, Aramo, C., additional, Araújo Ferreira, P. R., additional, Arnone, E., additional, Arteaga Velázquez, J. C., additional, Asorey, H., additional, Assis, P., additional, Avila, G., additional, Avocone, E., additional, Badescu, A. M., additional, Bakalova, A., additional, Balaceanu, A., additional, Barbato, F., additional, Bellido, J. A., additional, Berat, C., additional, Bertaina, M. E., additional, Bhatta, G., additional, Biermann, P. L., additional, Binet, V., additional, Bismark, K., additional, Bister, T., additional, Biteau, J., additional, Blazek, J., additional, Bleve, C., additional, Blümer, J., additional, Boháčová, M., additional, Boncioli, D., additional, Bonifazi, C., additional, Bonneau Arbeletche, L., additional, Borodai, N., additional, Brack, J., additional, Bretz, T., additional, Brichetto Orchera, P. G., additional, Briechle, F. L., additional, Buchholz, P., additional, Bueno, A., additional, Buitink, S., additional, Buscemi, M., additional, Büsken, M., additional, Bwembya, A., additional, Caballero-Mora, K. S., additional, Caccianiga, L., additional, Caracas, I., additional, Caruso, R., additional, Castellina, A., additional, Catalani, F., additional, Cataldi, G., additional, Cazon, L., additional, Cerda, M., additional, Chinellato, J. A., additional, Chudoba, J., additional, Chytka, L., additional, Clay, R. W., additional, Cobos Cerutti, A. C., additional, Colalillo, R., additional, Coleman, A., additional, Coluccia, M. R., additional, Conceiçao, R., additional, Condorelli, A., additional, Consolati, G., additional, Conte, M., additional, Contreras, F., additional, Convenga, F., additional, Correia dos Santos, D., additional, Costa, P. J., additional, Covault, C. E., additional, Cristinziani, M., additional, Cruz Sanchez, C. S., additional, Dasso, S., additional, Daumiller, K., additional, Dawson, B. R., additional, de Almeida, R. M., additional, de Jesús, J., additional, de Jong, S. J., additional, de Mello Neto, J. R. T., additional, De Mitri, I., additional, de Oliveira, J., additional, de Oliveira Franco, D., additional, de Palma, F., additional, de Souza, V., additional, De Vito, E., additional, Del Popolo, A., additional, Deligny, O., additional, Deval, L., additional, di Matteo, A., additional, Dobre, M., additional, Dobrigkeit, C., additional, D’Olivo, J. C., additional, Domingues Mendes, L. M., additional, dos Anjos, R. C., additional, Ebr, J., additional, Emam, M., additional, Engel, R., additional, Epicoco, I., additional, Erdmann, M., additional, Etchegoyen, A., additional, Falcke, H., additional, Farmer, J., additional, Farrar, G., additional, Fauth, A. C., additional, Fazzini, N., additional, Feldbusch, F., additional, Fenu, F., additional, Fernandes, A., additional, Fick, B., additional, Figueira, J. M., additional, Filipčič, A., additional, Fitoussi, T., additional, Flaggs, B., additional, Fodran, T., additional, Fujii, T., additional, Fuster, A., additional, Galea, C., additional, Galelli, C., additional, García, B., additional, Gemmeke, H., additional, Gesualdi, F., additional, Gherghel-Lascu, A., additional, Ghia, P. L., additional, Giaccari, U., additional, Giammarchi, M., additional, Glombitza, J., additional, Gobbi, F., additional, Gollan, F., additional, Golup, G., additional, Gómez Berisso, M., additional, Gómez Vitale, P. F., additional, Gongora, J. P., additional, González, J. M., additional, González, N., additional, Goos, I., additional, Góra, D., additional, Gorgi, A., additional, Gottowik, M., additional, Grubb, T. D., additional, Guarino, F., additional, Guedes, G. P., additional, Guido, E., additional, Hahn, S., additional, Hamal, P., additional, Hampel, M. R., additional, Hansen, P., additional, Harari, D., additional, Harvey, V. M., additional, Haungs, A., additional, Hebbeker, T., additional, Heck, D., additional, Hojvat, C., additional, Hörandel, J. R., additional, Horvath, P., additional, Hrabovský, M., additional, Huege, T., additional, Insolia, A., additional, Isar, P. G., additional, Janecek, P., additional, Johnsen, J. A., additional, Jurysek, J., additional, Kääpä, A., additional, Kampert, K. H., additional, Keilhauer, B., additional, Khakurdikar, A., additional, Kizakke Covilakam, V. V., additional, Klages, H. O., additional, Kleifges, M., additional, Kleinfeller, J., additional, Knapp, F., additional, Kunka, N., additional, Lago, B. L., additional, Langner, N., additional, Leigui de Oliveira, M. A., additional, Lenok, V., additional, Letessier-Selvon, A., additional, Lhenry-Yvon, I., additional, Lo Presti, D., additional, Lopes, L., additional, López, R., additional, Lu, L., additional, Luce, Q., additional, Lundquist, J. P., additional, Machado Payeras, A., additional, Majercakova, M., additional, Mandat, D., additional, Manning, B. C., additional, Manshanden, J., additional, Mantsch, P., additional, Marafico, S., additional, Mariani, F. M., additional, Mariazzi, A. G., additional, Mariş, I. C., additional, Marsella, G., additional, Martello, D., additional, Martinelli, S., additional, Martínez Bravo, O., additional, Martins, M. A., additional, Mastrodicasa, M., additional, Mathes, H. J., additional, Matthews, J., additional, Matthiae, G., additional, Mayotte, E., additional, Mayotte, S., additional, Mazur, P. O., additional, Medina-Tanco, G., additional, Meinert, J., additional, Melo, D., additional, Menshikov, A., additional, Michal, S., additional, Micheletti, M. I., additional, Miramonti, L., additional, Mollerach, S., additional, Montanet, F., additional, Morejon, L., additional, Morello, C., additional, Müller, A. L., additional, Mulrey, K., additional, Mussa, R., additional, Muzio, M., additional, Namasaka, W. M., additional, Nasr-Esfahani, A., additional, Nellen, L., additional, Nicora, G., additional, Niculescu-Oglinzanu, M., additional, Niechciol, M., additional, Nitz, D., additional, Norwood, I., additional, Nosek, D., additional, Novotny, V., additional, Nožka, L., additional, Nucita, A., additional, Núñez, L. A., additional, Oliveira, C., additional, Palatka, M., additional, Pallotta, J., additional, Parente, G., additional, Parra, A., additional, Pawlowsky, J., additional, Pech, M., additional, Pȩkala, J., additional, Pelayo, R., additional, Pereira, L. A. S., additional, Pereira Martins, E. E., additional, Perez Armand, J., additional, Pérez Bertolli, C., additional, Perrone, L., additional, Petrera, S., additional, Petrucci, C., additional, Pierog, T., additional, Pimenta, M., additional, Platino, M., additional, Pont, B., additional, Pothast, M., additional, Pourmohammad Shavar, M., additional, Privitera, P., additional, Prouza, M., additional, Puyleart, A., additional, Querchfeld, S., additional, Rautenberg, J., additional, Ravignani, D., additional, Reininghaus, M., additional, Ridky, J., additional, Riehn, F., additional, Risse, M., additional, Rizi, V., additional, Rodrigues de Carvalho, W., additional, Rodriguez Rojo, J., additional, Roncoroni, M. J., additional, Rossoni, S., additional, Roth, M., additional, Roulet, E., additional, Rovero, A. C., additional, Ruehl, P., additional, Saftoiu, A., additional, Saharan, M., additional, Salamida, F., additional, Salazar, H., additional, Salina, G., additional, Sanabria Gomez, J. D., additional, Sánchez, F., additional, Santos, E. M., additional, Santos, E., additional, Sarazin, F., additional, Sarmento, R., additional, Sato, R., additional, Savina, P., additional, Schäfer, C. M., additional, Scherini, V., additional, Schieler, H., additional, Schimassek, M., additional, Schimp, M., additional, Schlüter, F., additional, Schmidt, D., additional, Scholten, O., additional, Schoorlemmer, H., additional, Schovánek, P., additional, Schröder, F. G., additional, Schulte, J., additional, Schulz, T., additional, Sciutto, S. J., additional, Scornavacche, M., additional, Segreto, A., additional, Sehgal, S., additional, Shivashankara, S. U., additional, Sigl, G., additional, Silli, G., additional, Sima, O., additional, Smau, R., additional, Šmída, R., additional, Sommers, P., additional, Soriano, J. F., additional, Squartini, R., additional, Stadelmaier, M., additional, Stanca, D., additional, Stanič, S., additional, Stasielak, J., additional, Stassi, P., additional, Straub, M., additional, Streich, A., additional, Suárez-Durán, M., additional, Suomijärvi, T., additional, Supanitsky, A. D., additional, Szadkowski, Z., additional, Tapia, A., additional, Taricco, C., additional, Timmermans, C., additional, Tkachenko, O., additional, Tobiska, P., additional, Todero Peixoto, C. J., additional, Tomé, B., additional, Torrès, Z., additional, Travaini, A., additional, Travnicek, P., additional, Trimarelli, C., additional, Tueros, M., additional, Ulrich, R., additional, Unger, M., additional, Vaclavek, L., additional, Vacula, M., additional, Valdés Galicia, J. F., additional, Valore, L., additional, Varela, E., additional, Vásquez-Ramírez, A., additional, Veberič, D., additional, Ventura, C., additional, Vergara Quispe, I. D., additional, Verzi, V., additional, Vicha, J., additional, Vink, J., additional, Vorobiov, S., additional, Watanabe, C., additional, Watson, A. A., additional, Weindl, A., additional, Wiencke, L., additional, Wilczyński, H., additional, Wittkowski, D., additional, Wundheiler, B., additional, Yushkov, A., additional, Zapparrata, O., additional, Zas, E., additional, Zavrtanik, D., additional, and Zavrtanik, M., additional

Published
2023
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42. Searching for TeV Dark Matter in Irregular Dwarf Galaxies with HAWC Observatory

Author

Alfaro, R., primary, Alvarez, C., additional, Arteaga-Velázquez, J. C., additional, Rojas, D. Avila, additional, Solares, H. A. Ayala, additional, Babu, R., additional, Belmont-Moreno, E., additional, Caballero-Mora, K. S., additional, Capistrán, T., additional, Carramiñana, A., additional, Casanova, S., additional, Chaparro-Amaro, O., additional, Cotti, U., additional, Cotzomi, J., additional, De la Fuente, E., additional, Diaz Hernandez, R., additional, Dingus, B. L., additional, DuVernois, M. A., additional, Durocher, M., additional, Díaz-Vélez, J. C., additional, Espinoza, C., additional, Fan, K. L., additional, Fraija, N., additional, García-González, J. A., additional, Garfias, F., additional, González, M. M., additional, Harding, J. P., additional, Hernández-Cadena, S., additional, Huang, D., additional, Hueyotl-Zahuantitla, F., additional, Iriarte, A., additional, Joshi, V., additional, Kaufmann, S., additional, Kieda, D., additional, Lee, J., additional, Vargas, H. León, additional, Linnemann, J. T., additional, Longinotti, A. L., additional, Luis-Raya, G., additional, Malone, K., additional, Martinez, O., additional, Martínez-Castro, J., additional, Matthews, J. A., additional, Moreno, E., additional, Mostafá, M., additional, Nayerhoda, A., additional, Nellen, L., additional, Omodei, N., additional, Araujo, Y. Pérez, additional, Pérez-Pérez, E. G., additional, Rho, C. D., additional, Rosa-González, D., additional, Salazar, H., additional, Salazar-Gallegos, D., additional, Sandoval, A., additional, Serna-Franco, J., additional, Son, Y., additional, Springer, R. W., additional, Tibolla, O., additional, Tollefson, K., additional, Torres, I., additional, Torres-Escobedo, R., additional, Turner, R., additional, Ureña-Mena, F., additional, Villaseñor, L., additional, Wang, X., additional, Willox, E., additional, Zhou, H., additional, de León, C., additional, Gammaldi, V., additional, Karukes, E., additional, and Salucci, P., additional

Published
2023
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43. HAWC Detection of a TeV Halo Candidate Surrounding a Radio-quiet Pulsar

Author

Albert, A., primary, Alfaro, R., additional, Arteaga-Velázquez, J. C., additional, Ayala Solares, H. A., additional, Belmont-Moreno, E., additional, Capistrán, T., additional, Carramiñana, A., additional, Casanova, S., additional, Cotzomi, J., additional, De León, S. Coutiño, additional, Fuente, E. De la, additional, de León, C., additional, Diaz Hernandez, R., additional, DuVernois, M. A., additional, Díaz-Vélez, J. C., additional, Espinoza, C., additional, Fan, K. L., additional, Fraija, N., additional, Fang, K., additional, García-González, J. A., additional, Garfias, F., additional, Jardin-Blicq, A., additional, González, M. M., additional, Goodman, J. A., additional, Harding, J. P., additional, Hernandez, S., additional, Huang, D., additional, Hueyotl-Zahuantitla, F., additional, Hüntemeyer, P., additional, Iriarte, A., additional, Joshi, V., additional, Lara, A., additional, Lee, J., additional, Vargas, H. León, additional, Linnemann, J. T., additional, Longinotti, A. L., additional, Luis-Raya, G., additional, Malone, K., additional, Martinez, O., additional, Martínez-Castro, J., additional, Matthews, J. A., additional, Morales-Soto, J. A., additional, Moreno, E., additional, Mostafá, M., additional, Nayerhoda, A., additional, Nellen, L., additional, Newbold, M., additional, Nisa, M. U., additional, Araujo, Y. Pérez, additional, Son, Y., additional, Pérez-Pérez, E. G., additional, Rho, C. D., additional, Rosa-González, D., additional, Sandoval, A., additional, Schneider, M., additional, Serna-Franco, J., additional, Smith, A. J., additional, Springer, R. W., additional, Tollefson, K., additional, Torres, I., additional, Torres-Escobedo, R., additional, Wang, X., additional, Whitaker, K., additional, Willox, E., additional, and Zhou, H., additional

Published
2023
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44. A Catalog of the Highest-energy Cosmic Rays Recorded during Phase I of Operation of the Pierre Auger Observatory

Author

Abdul Halim, A., primary, Abreu, P., additional, Aglietta, M., additional, Allekotte, I., additional, Allison, P., additional, Almeida Cheminant, K., additional, Almela, A., additional, Alvarez-Muñiz, J., additional, Ammerman Yebra, J., additional, Anastasi, G. A., additional, Anchordoqui, L., additional, Andrada, B., additional, Andringa, S., additional, Aramo, C., additional, Araújo Ferreira, P. R., additional, Arnone, E., additional, Arteaga Velázquez, J. C., additional, Asorey, H., additional, Assis, P., additional, Ave, M., additional, Avila, G., additional, Avocone, E., additional, Badescu, A. M., additional, Bakalova, A., additional, Balaceanu, A., additional, Barbato, F., additional, Beatty, J., additional, Bellido, J. A., additional, Berat, C., additional, Bertaina, M. E., additional, Bertou, X., additional, Bhatta, G., additional, Biermann, P. L., additional, Billoir, P., additional, Binet, V., additional, Bismark, K., additional, Bister, T., additional, Biteau, J., additional, Blazek, J., additional, Bleve, C., additional, Blümer, J., additional, Boháčová, M., additional, Boncioli, D., additional, Bonifazi, C., additional, Bonneau Arbeletche, L., additional, Borodai, N., additional, Brack, J., additional, Bretz, T., additional, Brichetto Orchera, P. G., additional, Briechle, F. L., additional, Buchholz, P., additional, Bueno, A., additional, Buitink, S., additional, Buscemi, M., additional, Büsken, M., additional, Bwembya, A., additional, Caballero-Mora, K. S., additional, Caccianiga, L., additional, Caracas, I., additional, Caruso, R., additional, Castellina, A., additional, Catalani, F., additional, Cataldi, G., additional, Cazon, L., additional, Cerda, M., additional, Cester, R., additional, Chinellato, J. A., additional, Chirinos, J., additional, Chudoba, J., additional, Chytka, L., additional, Clay, R. W., additional, Cobos Cerutti, A. C., additional, Colalillo, R., additional, Coleman, A., additional, Coluccia, M. R., additional, Conceição, R., additional, Condorelli, A., additional, Consolati, G., additional, Contreras, F., additional, Convenga, F., additional, Correia dos Santos, D., additional, Covault, C. E., additional, Cristinziani, M., additional, Cruz Sanchez, C. S., additional, Dasso, S., additional, Daumiller, K., additional, Dawson, B. R., additional, de Almeida, R. M., additional, de Jesús, J., additional, de Jong, S. J., additional, de Mello Neto, J. R. T., additional, De Mitri, I., additional, de Oliveira, J., additional, de Oliveira Franco, D., additional, de Palma, F., additional, de Souza, V., additional, De Vito, E., additional, Del Popolo, A., additional, Deligny, O., additional, Deval, L., additional, di Matteo, A., additional, Dobre, M., additional, Dobrigkeit, C., additional, D’Olivo, J. C., additional, Domingues Mendes, L. M., additional, Dorofeev, A., additional, dos Anjos, R. C., additional, Ebr, J., additional, Eman, M., additional, Engel, R., additional, Epicoco, I., additional, Erdmann, M., additional, Etchegoyen, A., additional, Falcke, H., additional, Farmer, J., additional, Farrar, G., additional, Fauth, A. C., additional, Fazzini, N., additional, Feldbusch, F., additional, Fenu, F., additional, Fick, B., additional, Figueira, J. M., additional, Filipčič, A., additional, Fitoussi, T., additional, Flaggs, B., additional, Fodran, T., additional, Fujii, T., additional, Fuster, A., additional, Galea, C., additional, Galelli, C., additional, García, B., additional, Gemmeke, H., additional, Gesualdi, F., additional, Gherghel-Lascu, A., additional, Ghia, P. L., additional, Giaccari, U., additional, Giammarchi, M., additional, Glombitza, J., additional, Gobbi, F., additional, Gollan, F., additional, Golup, G., additional, Gómez Berisso, M., additional, Gómez Vitale, P. F., additional, Gongora, J. P., additional, González, J. M., additional, González, N., additional, Goos, I., additional, Góra, D., additional, Gorgi, A., additional, Gottowik, M., additional, Grubb, T. D., additional, Guarino, F., additional, Guedes, G. P., additional, Guido, E., additional, Hahn, S., additional, Hamal, P., additional, Hampel, M. R., additional, Hansen, P., additional, Harari, D., additional, Harton, J., additional, Harvey, V. M., additional, Haungs, A., additional, Hebbeker, T., additional, Heck, D., additional, Hojvat, C., additional, Hörandel, J. R., additional, Horvath, P., additional, Hrabovský, M., additional, Huege, T., additional, Insolia, A., additional, Isar, P. G., additional, Janecek, P., additional, Johnsen, J. A., additional, Jurysek, J., additional, Kääpä, A., additional, Kampert, K. H., additional, Keilhauer, B., additional, Khakurdikar, A., additional, Kizakke Covilakam, V. V., additional, Klages, H. O., additional, Kleifges, M., additional, Kleinfeller, J., additional, Knapp, F., additional, Knapp, J., additional, Kunka, N., additional, Lachaud, C., additional, Lago, B. L., additional, Langner, N., additional, Leigui de Oliveira, M. A., additional, Lenok, V., additional, Letessier-Selvon, A., additional, Lhenry-Yvon, I., additional, Lo Presti, D., additional, Lopes, L., additional, López, R., additional, Lu, L., additional, Luce, Q., additional, Lundquist, J. P., additional, Machado Payeras, A., additional, Mandat, D., additional, Manning, B. C., additional, Manshanden, J., additional, Mantsch, P., additional, Marafico, S., additional, Mariani, F. M., additional, Mariazzi, A. G., additional, Mariş, I. C., additional, Marsella, G., additional, Martello, D., additional, Martinelli, S., additional, Martínez Bravo, O., additional, Martins, M. A., additional, Mastrodicasa, M., additional, Mathes, H. J., additional, Matthews, J., additional, Matthiae, G., additional, Mayotte, E., additional, Mayotte, S., additional, Mazur, P. O., additional, Medina-Tanco, G., additional, Meinert, J., additional, Melo, D., additional, Menshikov, A., additional, Michal, S., additional, Micheletti, M. I., additional, Miramonti, L., additional, Mollerach, S., additional, Montanet, F., additional, Morejon, L., additional, Morello, C., additional, Müller, A. L., additional, Mulrey, K., additional, Mussa, R., additional, Muzio, M., additional, Namasaka, W. M., additional, Nasr-Esfahani, A., additional, Nellen, L., additional, Nicora, G., additional, Niculescu-Oglinzanu, M., additional, Niechciol, M., additional, Nitz, D., additional, Norwood, I., additional, Nosek, D., additional, Novotny, V., additional, Nožka, L., additional, Nucita, A, additional, Núñez, L. A., additional, Oliveira, C., additional, Palatka, M., additional, Pallotta, J., additional, Parente, G., additional, Parra, A., additional, Pawlowsky, J., additional, Pech, M., additional, Pȩkala, J., additional, Pelayo, R., additional, Pereira Martins, E. E., additional, Perez Armand, J., additional, Pérez Bertolli, C., additional, Perrone, L., additional, Petrera, S., additional, Petrucci, C., additional, Pierog, T., additional, Pimenta, M., additional, Platino, M., additional, Pont, B., additional, Pothast, M., additional, Pourmohammad Shavar, M., additional, Privitera, P., additional, Prouza, M., additional, Puyleart, A., additional, Querchfeld, S., additional, Rautenberg, J., additional, Ravignani, D., additional, Reininghaus, M., additional, Ridky, J., additional, Riehn, F., additional, Risse, M., additional, Rizi, V., additional, Rodrigues de Carvalho, W., additional, Rodriguez Rojo, J., additional, Roncoroni, M. J., additional, Rossoni, S., additional, Roth, M., additional, Roulet, E., additional, Rovero, A. C., additional, Ruehl, P., additional, Saftoiu, A., additional, Saharan, M., additional, Salamida, F., additional, Salazar, H., additional, Salina, G., additional, Sanabria Gomez, J. D., additional, Sánchez, F., additional, Santos, E. M., additional, Santos, E., additional, Sarazin, F., additional, Sarmento, R., additional, Sato, R., additional, Savina, P., additional, Schäfer, C. M., additional, Scherini, V., additional, Schieler, H., additional, Schimassek, M., additional, Schimp, M., additional, Schlüter, F., additional, Schmidt, D., additional, Scholten, O., additional, Schoorlemmer, H., additional, Schovánek, P., additional, Schröder, F. G., additional, Schulte, J., additional, Schulz, T., additional, Sciutto, S. J., additional, Scornavacche, M., additional, Segreto, A., additional, Sehgal, S., additional, Shivashankara, S. U., additional, Sigl, G., additional, Silli, G., additional, Sima, O., additional, Smau, R., additional, Šmída, R., additional, Sommers, P., additional, Soriano, J. F., additional, Squartini, R., additional, Stadelmaier, M., additional, Stanca, D., additional, Stanič, S., additional, Stasielak, J., additional, Stassi, P., additional, Straub, M., additional, Streich, A., additional, Suárez-Durán, M., additional, Sudholz, T., additional, Suomijärvi, T., additional, Supanitsky, A. D., additional, Szadkowski, Z., additional, Tapia, A., additional, Taricco, C., additional, Timmermans, C., additional, Tkachenko, O., additional, Tobiska, P., additional, Todero Peixoto, C. J., additional, Tomé, B., additional, Torrès, Z., additional, Travaini, A., additional, Travnicek, P., additional, Trimarelli, C., additional, Tueros, M., additional, Ulrich, R., additional, Unger, M., additional, Vaclavek, L., additional, Vacula, M., additional, Valdés Galicia, J. F., additional, Valore, L., additional, Varela, E., additional, Vásquez-Ramírez, A., additional, Veberič, D., additional, Ventura, C., additional, Vergara Quispe, I. D., additional, Verzi, V., additional, Vicha, J., additional, Villase nor Cendejas, L. M., additional, Vink, J., additional, Vorobiov, S., additional, Watanabe, C., additional, Watson, A. A., additional, Weindl, A., additional, Wiencke, L., additional, Wilczyński, H., additional, Wittkowski, D., additional, Wundheiler, B., additional, Younk, P., additional, Yushkov, A., additional, Zapparrata, O., additional, Zas, E., additional, Zavrtanik, D., additional, and Zavrtanik, M., additional

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2023
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45. Search for Gamma-Ray and Neutrino Coincidences Using HAWC and ANTARES Data

Author

Solares, H. A. Ayala, primary, Coutu, S., additional, Cowen, D., additional, Fox, D. B., additional, Grégoire, T., additional, McBride, F., additional, Mostafá, M., additional, Murase, K., additional, Wissel, S., additional, Albert, A., additional, Alves, S., additional, André, M., additional, Ardid, M., additional, Ardid, S., additional, Aubert, J.-J., additional, Aublin, J., additional, Baret, B., additional, Basa, S., additional, Belhorma, B., additional, Bendahman, M., additional, Benfenati, F., additional, Bertin, V., additional, Biagi, S., additional, Bissinger, M., additional, Boumaaza, J., additional, Bouta, M., additional, Bouwhuis, M. C., additional, Brânzaş, H., additional, Bruijn, R., additional, Brunner, J., additional, Busto, J., additional, Caiffi, B., additional, Calvo, D., additional, Capone, A., additional, Caramete, L., additional, Carr, J., additional, Carretero, V., additional, Celli, S., additional, Chabab, M., additional, Chau, T. N., additional, El Moursli, R. Cherkaoui, additional, Chiarusi, T., additional, Circella, M., additional, Coelho, J. A. B., additional, Coleiro, A., additional, Coniglione, R., additional, Coyle, P., additional, Creusot, A., additional, Díaz, A. F., additional, de Wasseige, G., additional, De Martino, B., additional, Distefano, C., additional, Di Palma, I., additional, Domi, A., additional, Donzaud, C., additional, Dornic, D., additional, Drouhin, D., additional, Eberl, T., additional, van Eeden, T., additional, van Eijk, D., additional, El Khayati, N., additional, Enzenhöfer, A., additional, Fermani, P., additional, Ferrara, G., additional, Filippini, F., additional, Fusco, L., additional, García, J., additional, Gay, P., additional, Glotin, H., additional, Gozzini, R., additional, Ruiz, R. Gracia, additional, Graf, K., additional, Guidi, C., additional, Hallmann, S., additional, van Haren, H., additional, Heijboer, A. J., additional, Hello, Y., additional, Hernández-Rey, J. J., additional, Hößl, J., additional, Hofestädt, J., additional, Huang, F., additional, Illuminati, G., additional, James, C. W., additional, Jisse-Jung, B., additional, de Jong, M., additional, de Jong, P., additional, Kadler, M., additional, Kalekin, O., additional, Katz, U., additional, Kouchner, A., additional, Kreykenbohm, I., additional, Kulikovskiy, V., additional, Lahmann, R., additional, Lamoureux, M., additional, Le Breton, R., additional, Lefèvre, D., additional, Leonora, E., additional, Levi, G., additional, Le Stum, S., additional, Lopez-Coto, D., additional, Loucatos, S., additional, Maderer, L., additional, Manczak, J., additional, Marcelin, M., additional, Margiotta, A., additional, Marinelli, A., additional, Martínez-Mora, J. A., additional, Melis, K., additional, Migliozzi, P., additional, Moussa, A., additional, Muller, R., additional, Nauta, L., additional, Navas, S., additional, Nezri, E., additional, Fearraigh, B. Ó, additional, Păun, A., additional, Păvălaş, G. E., additional, Pellegrino, C., additional, Perrin-Terrin, M., additional, Pestel, V., additional, Piattelli, P., additional, Pieterse, C., additional, Poirè, C., additional, Popa, V., additional, Pradier, T., additional, Randazzo, N., additional, Real, D., additional, Reck, S., additional, Riccobene, G., additional, Romanov, A., additional, Sánchez-Losa, A., additional, Samtleben, D. F. E., additional, Sanguineti, M., additional, Sapienza, P., additional, Schnabel, J., additional, Schumann, J., additional, Schüssler, F., additional, Seneca, J., additional, Spurio, M., additional, Stolarczyk, Th., additional, Taiuti, M., additional, Tayalati, Y., additional, Tingay, S. J., additional, Vallage, B., additional, Van Elewyck, V., additional, Versari, F., additional, Viola, S., additional, Vivolo, D., additional, Wilms, J., additional, Zavatarelli, S., additional, Zegarelli, A., additional, Zornoza, J. D., additional, Zúñiga, J., additional, Alvarez, C., additional, Arteaga-Velázquez, J. C., additional, Babu, R., additional, Belmont-Moreno, E., additional, Caballero-Mora, K. S., additional, Capistrán, T., additional, Carramiñana, A., additional, Casanova, S., additional, Cotti, U., additional, Chaparro-Amaro, O., additional, Cotzomi, J., additional, de León, S. Coutiño, additional, De la Fuente, E., additional, de León, C., additional, Diaz Hernandez, R., additional, DuVernois, M. A., additional, Durocher, M., additional, Díaz-Vélez, J. C., additional, Engel, K., additional, Espinoza, C., additional, Fan, K. L., additional, Alonso, M. Fernández, additional, Fraija, N., additional, García-González, J. A., additional, Garfias, F., additional, González, M. M., additional, Goodman, J. A., additional, Harding, J. P., additional, Hernandez, S., additional, Huang, D., additional, Hueyotl-Zahuantitla, F., additional, Hüntemeyer, P., additional, Iriarte, A., additional, Joshi, V., additional, Kaufmann, S., additional, Lara, A., additional, Vargas, H. León, additional, Linnemann, J. T., additional, Longinotti, A. L., additional, Luis-Raya, G., additional, Malone, K., additional, Martinez, O., additional, Martinez-Castellanos, I., additional, Martínez-Castro, J., additional, Matthews, J. A., additional, Miranda-Romagnoli, P., additional, Morales-Soto, J. A., additional, Moreno, E., additional, Nayerhoda, A., additional, Nellen, L., additional, Nisa, M. U., additional, Noriega-Papaqui, R., additional, Omodei, N., additional, Peisker, A., additional, Araujo, Y. Pérez, additional, Pérez-Pérez, E. G., additional, Rho, C. D., additional, Rosa-González, D., additional, Ruiz-Velasco, E., additional, Salazar, H., additional, Salesa Greus, F., additional, Sandoval, A., additional, Schneider, M., additional, Smith, A. J., additional, Son, Y., additional, Springer, R. W., additional, Tibolla, O., additional, Tollefson, K., additional, Torres, I., additional, Torres-Escobedo, R., additional, Turner, R., additional, Ureña-Mena, F., additional, Varela, E., additional, Wang, X., additional, Whitaker, K., additional, Willox, E., additional, Zepeda, A., additional, and Zhou, H., additional

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2023
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46. Detailed Analysis of the TeV γ-Ray Sources 3HWC J1928+178, 3HWC J1930+188, and the New Source HAWC J1932+192

Author

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

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2023
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47. γ-Ray Emission from Classical Nova V392 Per: Measurements from Fermi and HAWC

Author

Albert, A., primary, Alfaro, R., additional, Alvarez, C., additional, Arteaga-Velázquez, J. C., additional, Rojas, D. Avila, additional, Solares, H. A. Ayala, additional, Babu, R., additional, Belmont-Moreno, E., additional, Blochwitz, C., additional, Caballero-Mora, K. S., additional, Capistrán, T., additional, Carramiñana, A., additional, Casanova, S., additional, Chaparro-Amaro, O., additional, Cotti, U., additional, Cotzomi, J., additional, De la Fuente, E., additional, de León, C., additional, de León, S. Coutiño, additional, Diaz Hernandez, R., additional, Dingus, B. L., additional, DuVernois, M. A., additional, Durocher, M., additional, Díaz-Vélez, J. C., additional, Engel, K., additional, Espinoza, C., additional, Fan, K. L., additional, Fang, K., additional, Fraija, N., additional, García-González, J. A., additional, Garfias, F., additional, González, M. M., additional, Goodman, J. A., additional, Harding, J. P., additional, Hernandez, S., additional, Hinton, J., additional, Huang, D., additional, Hueyotl-Zahuantitla, F., additional, Hüntemeyer, P., additional, Iriarte, A., additional, Joshi, V., additional, Lara, A., additional, Lee, W. H., additional, Linnemann, J. T., additional, Longinotti, A. L., additional, Luis-Raya, G., additional, Lundeen, J., additional, Malone, K., additional, Marandon, V., additional, Martinez, O., additional, Martínez-Castro, J., additional, Matthews, J. A., additional, Miranda-Romagnoli, P., additional, Morales-Soto, J. A., additional, Moreno, E., additional, Mostafá, M., additional, Nayerhoda, A., additional, Nellen, L., additional, Newbold, M., additional, Nisa, M. U., additional, Noriega-Papaqui, R., additional, Omodei, N., additional, Peisker, A., additional, Araujo, Y. Pérez, additional, Pérez-Pérez, E. G., additional, Rho, C. D., additional, Rosa-González, D., additional, Ruiz-Velasco, E., additional, Salazar-Gallegos, D., additional, Greus, F. Salesa, additional, Sandoval, A., additional, Serna-Franco, J., additional, Smith, A. J., additional, Son, Y., additional, Springer, R. W., additional, Tibolla, O., additional, Tollefson, K., additional, Torres, I., additional, Torres-Escobedo, R., additional, Turner, R., additional, Ureña-Mena, F., additional, Villaseñor, L., additional, Wang, X., additional, Willox, E., additional, Zepeda, A., additional, Zhou, H., additional, Chomiuk, L., additional, Aydi, E., additional, Li, K. L., additional, Metzger, B. D., additional, and Vurm, I., additional

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2022
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48. Constraints on the Very High Energy Gamma-Ray Emission from Short GRBs with HAWC

Author

Albert, A., primary, Alfaro, R., additional, Alvarez, C., additional, Arteaga-Velázquez, J. C., additional, Arunbabu, K. P., additional, Rojas, D. Avila, additional, Solares, H. A. Ayala, additional, Babu, R., additional, Belmont-Moreno, E., additional, Brisbois, C., additional, Caballero-Mora, K. S., additional, Capistrán, T., additional, Carramiñana, A., additional, Casanova, S., additional, Chaparro-Amaro, O., additional, Cotti, U., additional, Cotzomi, J., additional, de León, S. Coutiño, additional, León, C. de, additional, De la Fuente, E., additional, Hernandez, R. Diaz, additional, Dichiara, S., additional, Dingus, B. L., additional, DuVernois, M. A., additional, Durocher, M., additional, Díaz-Vélez, J. C., additional, Engel, K., additional, Espinoza, C., additional, Fan, K. L., additional, Fraija, N., additional, Galván-Gámez, A., additional, García-González, J. A., additional, Garfias, F., additional, González, M. M., additional, Goodman, J. A., additional, Harding, J. P., additional, Hernandez, S., additional, Hona, B., additional, Huang, D., additional, Hueyotl-Zahuantitla, F., additional, Humensky, T. B., additional, Hüntemeyer, P., additional, Iriarte, A., additional, Joshi, V., additional, Kaufmann, S., additional, Lara, A., additional, Lee, W. H., additional, Vargas, H. León, additional, Linnemann, J. T., additional, Longinotti, A. L., additional, Luis-Raya, G., additional, Malone, K., additional, Marinelli, S. S., additional, Martinez, O., additional, Martínez-Castro, J., additional, Matthews, J. A., additional, Miranda-Romagnoli, P., additional, Morales-Soto, J. A., additional, Moreno, E., additional, Mostafá, M., additional, Nayerhoda, A., additional, Nellen, L., additional, Newbold, M., additional, Noriega-Papaqui, R., additional, Peisker, A., additional, Araujo, Y. Pérez, additional, Pérez-Pérez, E. G., additional, Ren, Z., additional, Rho, C. D., additional, Rosa-González, D., additional, Rosenberg, M., additional, Sacahui, J. R., additional, Salazar, H., additional, Greus, F. Salesa, additional, Sandoval, A., additional, Serna-Franco, J., additional, Smith, A. J., additional, Springer, R. W., additional, Surajbali, P., additional, Tibolla, O., additional, Tollefson, K., additional, Torres, I., additional, Torres-Escobedo, R., additional, Turner, R., additional, Villaseñor, L., additional, Wang, X., additional, Willox, E., additional, Zepeda, A., additional, and Zhou, H., additional

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2022
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49. Study of the Very High Energy Emission of M87 through its Broadband Spectral Energy Distribution

Author

Alfaro, R., primary, Alvarez, C., additional, Arteaga-Velázquez, J. C., additional, Avila Rojas, D., additional, Ayala Solares, H. A., additional, Belmont-Moreno, E., additional, Capistrán, T., additional, Carramiñana, A., additional, Casanova, S., additional, Cotti, U., additional, Cotzomi, J., additional, Coutiño de León, S., additional, De la Fuente, E., additional, de León, C., additional, Diaz Hernandez, R., additional, DuVernois, M. A., additional, Durocher, M., additional, Díaz-Vélez, J. C., additional, Espinoza, C., additional, Fan, K. L., additional, Fernández Alonso, M., additional, Fraija, N., additional, García-González, J. A., additional, Garfias, F., additional, González, M. M., additional, Goodman, J. A., additional, Harding, J. P., additional, Huang, D., additional, Hueyotl-Zahuantitla, F., additional, Hüntemeyer, P., additional, Joshi, V., additional, Vargas, H. León, additional, Linnemann, J. T., additional, Longinotti, A. L., additional, Luis-Raya, G., additional, Malone, K., additional, Martinez, O., additional, Martínez-Castro, J., additional, Matthews, J. A., additional, Miranda-Romagnoli, P., additional, Moreno, E., additional, Mostafá, M., additional, Nayerhoda, A., additional, Nellen, L., additional, Noriega-Papaqui, R., additional, Omodei, N., additional, Peisker, A., additional, Pérez-Pérez, E. G., additional, Rho, C. D., additional, Rosa-González, D., additional, Salazar, H., additional, Salazar-Gallegos, D., additional, Salesa Greus, F., additional, Sandoval, A., additional, Serna-Franco, J., additional, Son, Y., additional, Springer, R. W., additional, Tibolla, O., additional, Tollefson, K., additional, Torres, I., additional, Ureña-Mena, F., additional, Villaseñor, L., additional, Wang, X., additional, Willox, E., additional, and Zepeda, A., additional

Published
2022
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50. Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory

Author

Abreu, P., primary, Aglietta, M., additional, Albury, J. M., additional, Allekotte, I., additional, Almeida Cheminant, K., additional, Almela, A., additional, Alvarez-Muñiz, J., additional, Alves Batista, R., additional, Ammerman Yebra, J., additional, Anastasi, G. A., additional, Anchordoqui, L., additional, Andrada, B., additional, Andringa, S., additional, Aramo, C., additional, Araújo Ferreira, P. R., additional, Arnone, E., additional, Arteaga Velázquez, J. C., additional, Asorey, H., additional, Assis, P., additional, Avila, G., additional, Avocone, E., additional, Badescu, A. M., additional, Bakalova, A., additional, Balaceanu, A., additional, Barbato, F., additional, Bellido, J. A., additional, Berat, C., additional, Bertaina, M. E., additional, Bhatta, G., additional, Biermann, P. L., additional, Binet, V., additional, Bismark, K., additional, Bister, T., additional, Biteau, J., additional, Blazek, J., additional, Bleve, C., additional, Blümer, J., additional, Boháčová, M., additional, Boncioli, D., additional, Bonifazi, C., additional, Bonneau Arbeletche, L., additional, Borodai, N., additional, Botti, A. M., additional, Brack, J., additional, Bretz, T., additional, Brichetto Orchera, P. G., additional, Briechle, F. L., additional, Buchholz, P., additional, Bueno, A., additional, Buitink, S., additional, Buscemi, M., additional, Büsken, M., additional, Caballero-Mora, K. S., additional, Caccianiga, L., additional, Canfora, F., additional, Caracas, I., additional, Caruso, R., additional, Castellina, A., additional, Catalani, F., additional, Cataldi, G., additional, Cazon, L., additional, Cerda, M., additional, Chinellato, J. A., additional, Chudoba, J., additional, Chytka, L., additional, Clay, R. W., additional, Cobos Cerutti, A. C., additional, Colalillo, R., additional, Coleman, A., additional, Coluccia, M. R., additional, Conceição, R., additional, Condorelli, A., additional, Consolati, G., additional, Contreras, F., additional, Convenga, F., additional, Correia dos Santos, D., additional, Covault, C. E., additional, Dasso, S., additional, Daumiller, K., additional, Dawson, B. R., additional, Day, J. A., additional, de Almeida, R. M., additional, de Jesús, J., additional, de Jong, S. J., additional, de Mello Neto, J. R. T., additional, De Mitri, I., additional, de Oliveira, J., additional, de Oliveira Franco, D., additional, de Palma, F., additional, de Souza, V., additional, De Vito, E., additional, Del Popolo, A., additional, del Río, M., additional, Deligny, O., additional, Deval, L., additional, di Matteo, A., additional, Dobre, M., additional, Dobrigkeit, C., additional, D’Olivo, J. C., additional, Domingues Mendes, L. M., additional, dos Anjos, R. C., additional, Dova, M. T., additional, Ebr, J., additional, Engel, R., additional, Epicoco, I., additional, Erdmann, M., additional, Escobar, C. O., additional, Etchegoyen, A., additional, Falcke, H., additional, Farmer, J., additional, Farrar, G., additional, Fauth, A. C., additional, Fazzini, N., additional, Feldbusch, F., additional, Fenu, F., additional, Fick, B., additional, Figueira, J. M., additional, Filipčič, A., additional, Fitoussi, T., additional, Fodran, T., additional, Fujii, T., additional, Fuster, A., additional, Galea, C., additional, Galelli, C., additional, García, B., additional, Gemmeke, H., additional, Gesualdi, F., additional, Gherghel-Lascu, A., additional, Ghia, P. L., additional, Giaccari, U., additional, Giammarchi, M., additional, Glombitza, J., additional, Gobbi, F., additional, Gollan, F., additional, Golup, G., additional, Gómez Berisso, M., additional, Gómez Vitale, P. F., additional, Gongora, J. P., additional, González, J. M., additional, González, N., additional, Goos, I., additional, Góra, D., additional, Gorgi, A., additional, Gottowik, M., additional, Grubb, T. D., additional, Guarino, F., additional, Guedes, G. P., additional, Guido, E., additional, Hahn, S., additional, Hamal, P., additional, Hampel, M. R., additional, Hansen, P., additional, Harari, D., additional, Harvey, V. M., additional, Haungs, A., additional, Hebbeker, T., additional, Heck, D., additional, Hill, G. C., additional, Hojvat, C., additional, Hörandel, J. R., additional, Horvath, P., additional, Hrabovský, M., additional, Huege, T., additional, Insolia, A., additional, Isar, P. G., additional, Janecek, P., additional, Johnsen, J. A., additional, Jurysek, J., additional, Kääpä, A., additional, Kampert, K. H., additional, Keilhauer, B., additional, Khakurdikar, A., additional, Kizakke Covilakam, V. V., additional, Klages, H. O., additional, Kleifges, M., additional, Kleinfeller, J., additional, Knapp, F., additional, Kunka, N., additional, Lago, B. L., additional, Langner, N., additional, Leigui de Oliveira, M. A., additional, Lenok, V., additional, Letessier-Selvon, A., additional, Lhenry-Yvon, I., additional, Lo Presti, D., additional, Lopes, L., additional, López, R., additional, Lu, L., additional, Luce, Q., additional, Lundquist, J. P., additional, Machado Payeras, A., additional, Mancarella, G., additional, Mandat, D., additional, Manning, B. C., additional, Manshanden, J., additional, Mantsch, P., additional, Marafico, S., additional, Mariani, F. M., additional, Mariazzi, A. G., additional, Mariş, I. C., additional, Marsella, G., additional, Martello, D., additional, Martinelli, S., additional, Martínez Bravo, O., additional, Mastrodicasa, M., additional, Mathes, H. J., additional, Matthews, J., additional, Matthiae, G., additional, Mayotte, E., additional, Mayotte, S., additional, Mazur, P. O., additional, Medina-Tanco, G., additional, Melo, D., additional, Menshikov, A., additional, Michal, S., additional, Micheletti, M. I., additional, Miramonti, L., additional, Mollerach, S., additional, Montanet, F., additional, Morejon, L., additional, Morello, C., additional, Mostafá, M., additional, Müller, A. L., additional, Muller, M. A., additional, Mulrey, K., additional, Mussa, R., additional, Muzio, M., additional, Namasaka, W. M., additional, Nasr-Esfahani, A., additional, Nellen, L., additional, Nicora, G., additional, Niculescu-Oglinzanu, M., additional, Niechciol, M., additional, Nitz, D., additional, Norwood, I., additional, Nosek, D., additional, Novotny, V., additional, Nožka, L., additional, Nucita, A, additional, Núñez, L. A., additional, Oliveira, C., additional, Palatka, M., additional, Pallotta, J., additional, Papenbreer, P., additional, Parente, G., additional, Parra, A., additional, Pawlowsky, J., additional, Pech, M., additional, Pȩkala, J., additional, Pelayo, R., additional, Peña-Rodriguez, J., additional, Pereira Martins, E. E., additional, Perez Armand, J., additional, Pérez Bertolli, C., additional, Perrone, L., additional, Petrera, S., additional, Petrucci, C., additional, Pierog, T., additional, Pimenta, M., additional, Pirronello, V., additional, Platino, M., additional, Pont, B., additional, Pothast, M., additional, Privitera, P., additional, Prouza, M., additional, Puyleart, A., additional, Querchfeld, S., additional, Rautenberg, J., additional, Ravignani, D., additional, Reininghaus, M., additional, Ridky, J., additional, Riehn, F., additional, Risse, M., additional, Rizi, V., additional, Rodrigues de Carvalho, W., additional, Rodriguez Rojo, J., additional, Roncoroni, M. J., additional, Rossoni, S., additional, Roth, M., additional, Roulet, E., additional, Rovero, A. C., additional, Ruehl, P., additional, Saftoiu, A., additional, Saharan, M., additional, Salamida, F., additional, Salazar, H., additional, Salina, G., additional, Sanabria Gomez, J. D., additional, Sánchez, F., additional, Santos, E. M., additional, Santos, E., additional, Sarazin, F., additional, Sarmento, R., additional, Sato, R., additional, Savina, P., additional, Schäfer, C. M., additional, Scherini, V., additional, Schieler, H., additional, Schimassek, M., additional, Schimp, M., additional, Schlüter, F., additional, Schmidt, D., additional, Scholten, O., additional, Schoorlemmer, H., additional, Schovánek, P., additional, Schröder, F. G., additional, Schulte, J., additional, Schulz, T., additional, Sciutto, S. J., additional, Scornavacche, M., additional, Segreto, A., additional, Sehgal, S., additional, Shellard, R. C., additional, Sigl, G., additional, Silli, G., additional, Sima, O., additional, Smau, R., additional, Šmída, R., additional, Sommers, P., additional, Soriano, J. F., additional, Squartini, R., additional, Stadelmaier, M., additional, Stanca, D., additional, Stanič, S., additional, Stasielak, J., additional, Stassi, P., additional, Straub, M., additional, Streich, A., additional, Suárez-Durán, M., additional, Sudholz, T., additional, Suomijärvi, T., additional, Supanitsky, A. D., additional, Szadkowski, Z., additional, Tapia, A., additional, Taricco, C., additional, Timmermans, C., additional, Tkachenko, O., additional, Tobiska, P., additional, Todero Peixoto, C. J., additional, Tomé, B., additional, Torrès, Z., additional, Travaini, A., additional, Travnicek, P., additional, Trimarelli, C., additional, Tueros, M., additional, Ulrich, R., additional, Unger, M., additional, Vaclavek, L., additional, Vacula, M., additional, Valdés Galicia, J. F., additional, Valore, L., additional, Varela, E., additional, Vásquez-Ramírez, A., additional, Veberič, D., additional, Ventura, C., additional, Vergara Quispe, I. D., additional, Verzi, V., additional, Vicha, J., additional, Vink, J., additional, Vorobiov, S., additional, Wahlberg, H., additional, Watanabe, C., additional, Watson, A. A., additional, Weindl, A., additional, Wiencke, L., additional, Wilczyński, H., additional, Wittkowski, D., additional, Wundheiler, B., additional, Yushkov, A., additional, Zapparrata, O., additional, Zas, E., additional, Zavrtanik, D., additional, Zavrtanik, M., additional, and Zehrer, L., additional

Published
2022
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