Author: "Pedro Miranda-Romagnoli" - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"Pedro Miranda-Romagnoli"' showing total 69 results

Start Over Author "Pedro Miranda-Romagnoli"

69 results on '"Pedro Miranda-Romagnoli"'

1. Historical Elite Differential Evolution Based on Particle Swarm Optimization Algorithm for Texture Optimization with Application in Particle Physics

Author: Emmanuel Martínez-Guerrero, Pedro Lagos-Eulogio, Pedro Miranda-Romagnoli, Roberto Noriega-Papaqui, and Juan Carlos Seck-Tuoh-Mora
Subjects: optimization, high energy physics, differential evolution, particle swarm optimization, Technology, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999
Abstract: Within the phenomenology of particle physics, the theoretical model of 4-zero textures is validated using a chi-square criterion that compares experimental data with the computational results of the model. Traditionally, analytical methods that often imply simplifications, combined with computational analysis, have been used to validate texture models. In this paper, we propose a new meta-heuristic variant of the differential evolution algorithm that incorporates aspects of the particle swarm optimization algorithm called “HE-DEPSO” to obtain chi-squared values that are less than a bound value, which exhaustive and traditional algorithms cannot obtain. The results show that the proposed algorithm can optimize the chi-square function according to the required criteria. We compare simulated data with experimental data in the allowed search region, thereby validating the 4-zero texture model.
Published: 2024
Full Text: View/download PDF

2. Improvement in Sizing Constrained Analog IC via Ts-CPD Algorithm

Author: Pedro Lagos-Eulogio, Pedro Miranda-Romagnoli, Juan Carlos Seck-Tuoh-Mora, and Norberto Hernández-Romero
Subjects: cellular particle swarm optimization (CPSO), constrained optimization, circuit sizing tool, particle swarm optimization, Electronic computers. Computer science, QA75.5-76.95
Abstract: In this work, we propose a variation of the cellular particle swarm optimization algorithm with differential evolution hybridization (CPSO-DE) to include constrained optimization, named Ts-CPD. It is implemented as a kernel of electronic design automation (EDA) tool capable of sizing circuit components considering a single-objective design with restrictions and constraints. The aim is to improve the optimization solutions in the sizing of analog circuits. To evaluate our proposal’s performance, we present the design of three analog circuits: a differential amplifier, a two-stage operational amplifier (op-amp), and a folded cascode operational transconductance amplifier. Numerical simulation results indicate that Ts-CPD can find better solutions, in terms of the design objective and the accomplishment of constraints, than those reported in previous works. The Ts-CPD implementation was performed in Matlab using Ngspice and can be found on GitHub (see Data Availability Statement).
Published: 2023
Full Text: View/download PDF

3. Clasificación de cáncer de piel utilizando aprendizaje profundo

Author: Luis Rey Jaime-Calva, Heydy Castillejos-Fernández, Anilú Franco-Árcega, Pedro Miranda-Romagnoli, and Obed Pérez-Cortés
Subjects: Complementary and alternative medicine, Pharmaceutical Science, Pharmacology (medical)
Abstract: El cáncer de piel es una enfermedad que afecta a las personas con tono de piel oscuro o claro. Por otra parte, cada vez más personas tienden a emplear camas de bronceado o permanecer periodos prolongados de tiempo ante los rayos del sol, provocando que esta enfermedad sea más frecuente. Como complemento en el diagnóstico de esta enfermedad existe la inteligencia artificial, la cual, permite emplear algoritmos de clasificación como árboles de decisión, máquinas de soporte vectorial, regresión logística, entre otros; además, del uso de algoritmos de aprendizaje profundo como las redes neuronales convolucionales, ayudando a realizar un pre-diagnostico de cáncer de piel. En este artículo se explicara el desarrollo de un método, en el cual, utilizando la base de datos de imágenes dermatológicas publicada por el Internacional Skin Imaging Collaboration (ISIC) \citep{ISIC:12} se considera un conjunto de imágenes las cuales ya han sido caracterizadas por especialistas y que se encuentran en un grupo de benignas y malignas.
Published: 2022
Full Text: View/download PDF

4. Implicaciones de una textura de dos ceros en las matrices de masa de los quarks

Author: Pedro Miranda-Romagnoli, Roberto Noriega-Papaqui, and Aurora Pontón-Gallardo-Rodríguez
Subjects: Complementary and alternative medicine, Pharmaceutical Science, Pharmacology (medical)
Abstract: Se realiza un análisis numérico de elementos de las matrices de masa de los quarks, considerando que tienen una estructura de texturas de dos ceros. Los parámetros libres del modelo de texturas utilizado, son acotados al imponer que se reproduzcan los valores experimentales provenientes de la matriz V_{CKM}, para lo cual se utiliza un criterio de chi cuadrada. A su vez un algoritmo genético es implementado para encontrar, numéricamente, valores de los parámetros que cumplan con el criterio de chi cuadrada. Se analizan los valores numéricos encontrados por el algoritmo y se propone una relación para los elementos de las matrices de masa de los quarks.
Published: 2022
Full Text: View/download PDF

5. Limits on Diffuse Dark Matter with HAWC

Author: Eduardo Moreno Barbosa, Ramiro Torres Escobedo, Fernando Garfias, Thomas Weisgarber, Laura Olivera-Nieto, Nicola Omodei, Ian Herzog, Diego Garcia Aguilar, Juan de Dios Álvarez Romero, Arturo Iriarte, Segev BenZvi, Luis Villaseñor, Jorge Luis Flores, Ibrahim Torres, Hugo Alberto Ayala Solares, William H. Lee, James Ryan, Samridha Kunwar, Israel Martinez Castellanos, Wayne Robert Springer, Hannah Jhee, Julie McEnery, Chang Dong Rho, Roberto Noriega-Papaqui, Arnulfo Zepeda, Hazal Goksu, Jorge Cotzomi, Nissim Illich Fraija, Josefa Becerra Gonzalez, Ignacio Taboada, Brian Fick, Oscar Chaparro-Amaro, Mora Durocher, J. A. Goodman, Eucario Gonzalo Pérez Pérez, Lorenzo Diaz, Ernesto Belmont-Moreno, Ruben Lopez-Coto, Ruben Alfaro, Yunior Pérez Araujo, Anna Lia Longinotti, Jim Hinton, Sergio Hernández Cadena, Jason Fan, Petra Hüntemeyer, Jason Lee, Daniel Rosa-Gonzalez, Elijah Willox, Rishi Babu, Humberto Ibarguen Salazar, Kelly Malone, Mateo Fernandez Alonso, Mehr Nisa, Ian James Watson, Gerd J. Kunde, Maria Magdalena González, Hermes Leon Vargas, David Kieda, Eduardo de la Fuente, Michael Schneider, Filiberto Hueyotl-Zahuantitla, Amid Nayerhoda, Vincent Marandon, Alberto Carramiñana, John Matthews, Lukas Nellen, Jose Luis García-Luna, Miguel Mostafa, Karen S. Caballero Mora, Felix Werner, Hao Zhou, Cederik León de León, Robert Ellsworth, Raquel Diaz Hernandez, Vardan Baghmanyan, Guillermo García-Torales, Arun Babu Kollamparambil, Binita Hona, Umberto Cotti, Sabrina Casanova, Oscar Martinez, Brian Humensky, Francisco Salesa Greus, Ke Fang, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Tomás Capistrán, Joshua Wood, Pooja Surajbali, Andrés Sandoval, Gus Sinnis, Alison Peisker, Anushka Udara Abeysekara, Andrew James Smith, Fernando Ureña-Mena, Gaurang Yodh, Henrike Fleischhack, Kristi Engel, Andrea Albert, Jose Andres Garcia-Gonzalez, Juan Carlos Arteaga Velazquez, Ahron S. Barber, Meghan Tanner, Colas Rivière, Jesús Martínez-Castro, Juan Carlos Díaz Vélez, Armelle Jardin-Blicq, Rhiannon Turner, Chad Brisbois, José Roberto Angeles Camacho, César Alvarez, Sara Coutiño de Leon, Vikas Joshi, Alejandro Lara, Gilgamesh Luis-Raya, Michael DuVernois, Kirsten Tollefson, Harm Schoorlemmer, David Berley, Michael Newbold, Hawc, Pedro Miranda-Romagnoli, Xiaojie Wang, Joe Lundeen, Michelle Hui, J. Patrick Harding, Humberto Martínez Huerta, Edna Ruiz-Velasco, Dirk Lennarz, Gwenael Giacinti, José Serna-Franco, J. T. Linnemann, Brenda Dingus, Daniel Omar Avila Rojas, and Dezhi Huang
Subjects: Physics, Dark matter, Astrophysics
Published: 2021
Full Text: View/download PDF

6. Limits on the Diffuse Gamma-Ray Background with HAWC

Author: Ernesto Belmont-Moreno, Juan Carlos Arteaga Velazquez, Gerd J. Kunde, Jim Hinton, Sergio Hernández Cadena, Meghan Tanner, Colas Rivière, Eduardo Moreno Barbosa, Dirk Lennarz, José Serna-Franco, Elijah Willox, Harm Schoorlemmer, Samridha Kunwar, Jesús Martínez-Castro, Israel Martinez Castellanos, Segev BenZvi, J. T. Linnemann, Dezhi Huang, Vikas Joshi, Hannah Jhee, Ruben Lopez-Coto, Juan Carlos Díaz Vélez, Hawc, Eucario Gonzalo Pérez Pérez, David Berley, Armelle Jardin-Blicq, Yunior Pérez Araujo, Anna Lia Longinotti, Gilgamesh Luis-Raya, Xiaojie Wang, Guillermo García-Torales, Joe Lundeen, Diego Garcia Aguilar, Kirsten Tollefson, Rhiannon Turner, Nissim Illich Fraija, Chad Brisbois, Arun Babu Kollamparambil, Brenda Dingus, Pedro Miranda-Romagnoli, Ke Fang, Daniel Omar Avila Rojas, Jorge Luis Flores, Ibrahim Torres, Juan de Dios Álvarez Romero, Alejandro Lara, Ahron S. Barber, Fernando Garfias, José Roberto Angeles Camacho, Michael Schneider, Felix Werner, Ian Herzog, William H. Lee, Jason Fan, Julie McEnery, Miguel Mostafa, Rishi Babu, Kelly Malone, Josefa Becerra Gonzalez, Michael DuVernois, Ignacio Taboada, Cederik León de León, Gwenael Giacinti, Chang Dong Rho, Michael Newbold, Thomas Weisgarber, Laura Olivera-Nieto, Michelle Hui, Vincent Marandon, Alberto Carramiñana, J. A. Goodman, Ruben Alfaro, Humberto Ibarguen Salazar, Robert Ellsworth, Raquel Diaz Hernandez, Vardan Baghmanyan, Alison Peisker, Andrew James Smith, César Alvarez, Mehr Nisa, Ian James Watson, Jason Lee, Arnulfo Zepeda, Hazal Goksu, Daniel Rosa-Gonzalez, Henrike Fleischhack, Umberto Cotti, Brian Fick, Lorenzo Diaz, David Kieda, Francisco Salesa Greus, Sabrina Casanova, Maria Magdalena González, Joshua Wood, Eduardo de la Fuente, Kristi Engel, Jorge Cotzomi, Filiberto Hueyotl-Zahuantitla, Hermes Leon Vargas, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Tomás Capistrán, John Matthews, Anushka Udara Abeysekara, Hugo Alberto Ayala Solares, Oscar Martinez, Jose Luis García-Luna, Roberto Noriega-Papaqui, Oscar Chaparro-Amaro, James Ryan, Wayne Robert Springer, Amid Nayerhoda, Brian Humensky, Pooja Surajbali, Andrés Sandoval, Gus Sinnis, Fernando Ureña-Mena, Gaurang Yodh, Mora Durocher, Petra Hüntemeyer, Binita Hona, Mateo Fernandez Alonso, Karen S. Caballero Mora, Luis Villaseñor, Jose Andres Garcia-Gonzalez, Sara Coutiño de Leon, Edna Ruiz-Velasco, J. Patrick Harding, Ramiro Torres Escobedo, Humberto Martínez Huerta, Nicola Omodei, Arturo Iriarte, Lukas Nellen, Hao Zhou, and Andrea Albert
Subjects: Physics, Gamma ray, Astrophysics
Published: 2021
Full Text: View/download PDF

7. CONSTRAINTS ON THE VERY HIGH ENERGY GAMMA-RAY EMISSION WITH HAWC

Author: Yunior Frainen Pérez, Maria Magdalena González, Nissim Illich Fraija, Anushka Udara Abeysekara, Andrea Albert, Ruben Alfaro, César Alvarez, Juan de Dios Álvarez Romero, José Roberto Angeles Camacho, Juan Carlos Arteaga Velazquez, Arun Babu Kollamparambil, Daniel Omar Avila Rojas, Hugo Alberto Ayala Solares, Rishi Babu, Vardan Baghmanyan, Ahron S. Barber, Josefa Becerra González, Ernesto Belmont-Moreno, Segev BenZvi, David Berley, Chad Brisbois, Karen S. Caballero Mora, Tomás Capistrán Rojas, Alberto Carramiñana, Sabrina Casanova, Oscar Chaparro-Amaro, Umberto Cotti, Jorge Cotzomi, Sara Coutiño de León, Eduardo de la Fuente, Cederik León de León, Lorenzo Diaz, Raquel Diaz Hernandez, Juan Carlos Díaz Vélez, Brenda Dingus, Mora Durocher, Michael DuVernois, Robert Ellsworth, Kristi Engel, María Catalina Espinoza Hernández, Jason Fan, Ke Fang, Mateo Fernandez Alonso, Brian Fick, Henrike Fleischhack, Jorge Luis Flores, Diego Garcia Aguilar, Jose Andres Garcia-Gonzalez, Jose Luis García-Luna, Guillermo García-Torales, Fernando Garfias, Gwenael Giacinti, Hazal Goksu, Jordan A. Goodman, J. Patrick Harding, Sergio Hernández Cadena, Ian Herzog, Jim Hinton, Binita Hona, Dezhi Huang, Filiberto Hueyotl-Zahuantitla, Michelle Hui, Brian Humensky, Petra Hüntemeyer, Arturo Iriarte, Armelle Jardin-Blicq, Hannah Jhee, Vikas Joshi, David Kieda, Gerd J. Kunde, Samridha Kunwar, Alejandro Lara, Jason LEE, William H. Lee, Dirk Lennarz, Hermes Leon Vargas, Jim Linnemann, Anna Lia Longinotti, Rubén López-Coto, Gilgamesh Luis-Raya, Joe Lundeen, Kelly Malone, Vincent Marandon, Oscar M Martinez, Israel Martinez Castellanos, Humberto Martínez Huerta, Jesús Martínez-Castro, John Matthews, Julie McEnery, Pedro Miranda-Romagnoli, Jorge Antonio Morales Soto, Eduardo Moreno Barbosa, Miguel Mostafa, Amid Nayerhoda, Lukas Nellen, Michael Newbold, Mehr Un Nisa, Roberto Noriega-Papaqui, Laura Olivera-Nieto, Nicola Omodei, Alison Peisker, Eucario Gonzalo Pérez Pérez, Chang Dong Rho, Colas Rivière, Daniel Rosa-Gonzalez, Edna Ruiz-Velasco, James Ryan, Humberto Ibarguen Salazar, Francisco Salesa Greus, Andrés Sandoval, Michael Schneider, Harm Schoorlemmer, José Serna-Franco, Gus Sinnis, Andrew James Smith, Wayne Robert Springer, Pooja Surajbali, Ignacio Taboada, Meghan Tanner, Kirsten Tollefson, Ibrahim Torres, Ramiro Torres Escobedo, Rhiannon M. Turner, Fernando Josue Urena Mena, Luis Villaseñor, Xiaojie Wang, Ian James Watson, Thomas Weisgarber, Felix Werner, Elijah Job Willox, Joshua Wood, Gaurang Yodh, Arnulfo Zepeda, and Hao Zhou
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, High energy, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Phase (waves), FOS: Physical sciences, Context (language use), Astrophysics, Parameter space, Light curve, Synchrotron, law.invention, Afterglow, law, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Gamma-ray bursts (GRBs) are among the most luminous sources in the universe. The nature of their emission at TeV energies is one of the most relevant open issues related to these events. The temporal and spectral features inferred from the early and late emissions usually known as prompt and afterglow, respectively, can be interpreted within the context of the fireball model. The synchrotron self-Compton process is expected during the afterglow phase. We explain how the theoretical SSC light curves can be compared with hypothetical upper limit located at z=0.3. We show the allowed parameter space of the microphysical parameters and density of the circumburst medium. The most restrictive results are obtained when the SSC process lies in the fast cooling regime, Comment: Presented at the 37th International Cosmic Ray Conference(ICRC2021),Berlin, Germany-online
Published: 2021
Full Text: View/download PDF

8. Monitoring the radio galaxy M87 with HAWC

Author: Tomás Capistrán, Daniel Omar Avila Rojas, Maria Magdalena González, Nissim Illich Fraija, Ruben Alfaro, Anushka Udara Abeysekara, Andrea Albert, César Alvarez, Juan de Dios Álvarez Romero, José Roberto Angeles Camacho, Juan Carlos Arteaga Velazquez, Arun Babu Kollamparambil, Hugo Alberto Ayala Solares, Rishi Babu, Vardan Baghmanyan, Ahron S. Barber, Josefa Becerra Gonzalez, Ernesto Belmont-Moreno, Segev BenZvi, David Berley, Chad Brisbois, Karen S. Caballero Mora, Alberto Carramiñana, Sabrina Casanova, Oscar Chaparro-Amaro, Umberto Cotti, Jorge Cotzomi, Sara Coutiño de León, Eduardo de la Fuente, Cederik León de León, Lorenzo Diaz, Raquel Diaz Hernandez, Juan Carlos Díaz Vélez, Brenda Dingus, Mora Durocher, Michael DuVernois, Robert Ellsworth, Kristi Engel, María Catalina Espinoza Hernández, Jason Fan, Ke Fang, Mateo Fernandez Alonso, Brian Fick, Henrike Fleischhack, Jorge Luis Flores, Diego Garcia Aguilar, Jose Andres Garcia-Gonzalez, Jose Luis García-Luna, Guillermo García-Torales, Fernando Garfias, Gwenael Giacinti, Hazal Goksu, Jordan A. Goodman, J. Patrick Harding, Sergio Hernández Cadena, Ian Herzog, Jim Hinton, Binita Hona, Dezhi Huang, Filiberto Hueyotl-Zahuantitla, Michelle Hui, Brian Humensky, Petra Hüntemeyer, Arturo Iriarte, Armelle Jardin-Blicq, Hannah Jhee, Vikas Joshi, David Kieda, Gerd J. Kunde, Samridha Kunwar, Alejandro Lara, Jason LEE, William H. Lee, Dirk Lennarz, Hermes Leon Vargas, Jim Linnemann, Anna Lia Longinotti, Ruben Lopez-Coto, Gilgamesh Luis-Raya, Joe Lundeen, Kelly Malone, Vincent Marandon, Oscar M Martinez, Israel Martinez Castellanos, Humberto Martínez Huerta, Jesús Martínez-Castro, John Matthews, Julie McEnery, Pedro Miranda-Romagnoli, Jorge Antonio Morales Soto, Eduardo Moreno Barbosa, Miguel Mostafa, Amid Nayerhoda, Lukas Nellen, Michael Newbold, Mehr Un Nisa, Roberto Noriega-Papaqui, Laura Olivera-Nieto, Nicola Omodei, Alison Peisker, Yunior Pérez Araujo, Eucario Gonzalo Pérez Pérez, Chang Dong Rho, Colas Rivière, Daniel Rosa-Gonzalez, Edna Ruiz-Velasco, James Ryan, Humberto Ibarguen Salazar, Francisco Salesa Greus, Andrés Sandoval, Michael Schneider, Harm Schoorlemmer, José Serna-Franco, Gus Sinnis, Andrew James Smith, Wayne Robert Springer, Pooja Surajbali, Ignacio Taboada, Meghan Tanner, Kirsten Tollefson, Ibrahim Torres, Ramiro Torres Escobedo, Rhiannon M. Turner, Fernando Josue Urena Mena, Luis Villaseñor, Xiaojie Wang, Ian James Watson, Thomas Weisgarber, Felix Werner, Elijah Job Willox, Joshua Wood, Gaurang Yodh, Arnulfo Zepeda, and Hao Zhou
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Radio galaxy, Low activity, Radiative transfer, Northern Hemisphere, FOS: Physical sciences, Astronomy, Field of view, MAGIC (telescope), Astrophysics - High Energy Astrophysical Phenomena
Abstract: Studies of radio galaxies at TeV energies are fascinating because their jets are misaligned concerning our sightline. Thus, it provides us with a unique opportunity to study the structure of their jets, the radiative processes, and the acceleration mechanisms involved in them. In addition, some radio galaxies have presented variability in their emission, like the giant radio galaxy M87, which has reported several activity periods. Due to its duty cycle >95% and instantaneous field of view of 2 sr, HAWC provides daily monitoring of variable sources visible from the Northern Hemisphere. In this work, we show the results of monitoring M87 between January 2015 and December 2018. HAWC's observations are consistent with the low activity state reported by other instruments (like H.E.S.S and MAGIC). However, after September 2017 (~MJD 58000), the HAWC measurements of M87 show hints of higher activity., Presented at the 37th International Cosmic Ray Conference (ICRC2021), Berlin, Germany - Online
Published: 2021
Full Text: View/download PDF

9. Convolutional Neural Networks for Low Energy Gamma-Ray Air Shower Identification with HAWC

Author: Gwenael Giacinti, Dezhi Huang, José Serna-Franco, J. T. Linnemann, Vikas Joshi, Hawc, Brenda Dingus, Karen S. Caballero Mora, Rishi Babu, Gerd J. Kunde, Kelly Malone, Daniel Omar Avila Rojas, Juan de Dios Álvarez Romero, Dirk Lennarz, Vincent Marandon, Alberto Carramiñana, Eduardo Moreno Barbosa, William H. Lee, Raquel Diaz Hernandez, Vardan Baghmanyan, Joe Lundeen, Michael Schneider, Julie McEnery, Felix Werner, Ramiro Torres Escobedo, Jesús Martínez-Castro, Chang Dong Rho, Gilgamesh Luis-Raya, Kirsten Tollefson, Harm Schoorlemmer, Brian Humensky, Ke Fang, David Kieda, Hugo Alberto Ayala Solares, Roberto Noriega-Papaqui, Nicola Omodei, Arturo Iriarte, Segev BenZvi, Humberto Ibarguen Salazar, Ahron S. Barber, Arnulfo Zepeda, Josefa Becerra Gonzalez, David Berley, Brian Fick, Mehr Nisa, Diego Garcia Aguilar, Ian James Watson, J. A. Goodman, Robert Ellsworth, Lorenzo Diaz, Xiaojie Wang, Oscar Chaparro-Amaro, Ernesto Belmont-Moreno, Andrea Albert, Alison Peisker, Andrew James Smith, Hannah Jhee, Umberto Cotti, Binita Hona, Jim Hinton, Sergio Hernández Cadena, John Matthews, Sabrina Casanova, Miguel Mostafa, Pedro Miranda-Romagnoli, Laura Olivera-Nieto, Edna Ruiz-Velasco, Fernando Garfias, Juan Carlos Arteaga Velazquez, Jorge Luis Flores, Ibrahim Torres, Cederik León de León, Henrike Fleischhack, Meghan Tanner, Thomas Weisgarber, Jose Andres Garcia-Gonzalez, Oscar Martinez, César Alvarez, Jorge Cotzomi, Hermes Leon Vargas, Elijah Willox, Colas Rivière, Nissim Illich Fraija, Alejandro Lara, Luis Villaseñor, Ruben Lopez-Coto, Michael Newbold, Hazal Goksu, James Ryan, Yunior Pérez Araujo, Anna Lia Longinotti, Eucario Gonzalo Pérez Pérez, Michael DuVernois, Francisco Salesa Greus, Joshua Wood, Jose Luis García-Luna, Jason Fan, Rhiannon Turner, Chad Brisbois, Lukas Nellen, Sara Coutiño de Leon, Guillermo García-Torales, Arun Babu Kollamparambil, Kristi Engel, Pooja Surajbali, Andrés Sandoval, Hao Zhou, Gus Sinnis, Michelle Hui, Fernando Ureña-Mena, Gaurang Yodh, José Roberto Angeles Camacho, Samridha Kunwar, Mora Durocher, Petra Hüntemeyer, Israel Martinez Castellanos, Maria Magdalena González, Ignacio Taboada, Mateo Fernandez Alonso, Ruben Alfaro, Jason Lee, Daniel Rosa-Gonzalez, Eduardo de la Fuente, Filiberto Hueyotl-Zahuantitla, Juan Carlos Díaz Vélez, J. Patrick Harding, Armelle Jardin-Blicq, Ian Herzog, Humberto Martínez Huerta, Wayne Robert Springer, Ian Watson, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Tomás Capistrán, Anushka Udara Abeysekara, and Amid Nayerhoda
Subjects: Physics, Identification (information), Air shower, Low energy, business.industry, Gamma ray, Pattern recognition, Artificial intelligence, business, Convolutional neural network
Published: 2021
Full Text: View/download PDF

10. HAWC results on TeV emitting blazars

Author: Luis Villaseñor, Alejandro Lara, Brian Humensky, Tomás Capistrán Rojas, Edna Ruiz-Velasco, John Matthews, Gerd J. Kunde, Hannah Jhee, José Serna-Franco, Jose Andres Garcia-Gonzalez, Maria Magdalena González, Karen S. Caballero Mora, Michael DuVernois, Jesús Martínez-Castro, Nissim Illich Fraija, Fernando Garfias, Rishi Babu, Kelly Malone, Ruben Lopez-Coto, Vincent Marandon, Alberto Carramiñana, Thomas Weisgarber, Ke Fang, Alison Peisker, Oscar Martinez, J. T. Linnemann, Yunior Pérez Araujo, Anna Lia Longinotti, Michael Schneider, Felix Werner, Raquel Diaz Hernandez, Vardan Baghmanyan, Andrew James Smith, Jason Fan, Eduardo de la Fuente, Andrea Albert, Filiberto Hueyotl-Zahuantitla, Binita Hona, Pooja Surajbali, Andrés Sandoval, Gus Sinnis, J. Patrick Harding, Humberto Martínez Huerta, Michelle Hui, Henrike Fleischhack, Hermes Leon Vargas, Fernando Ureña-Mena, Juan Carlos Arteaga Velazquez, Miguel Mostafa, Meghan Tanner, Gaurang Yodh, Ignacio Taboada, Colas Rivière, Cederik León de León, James Ryan, Lukas Nellen, Juan Carlos Díaz Vélez, Juan de Dios Álvarez Romero, Sara Coutiño de Leon, Eduardo Moreno Barbosa, Mora Durocher, Ahron S. Barber, César Alvarez, Arnulfo Zepeda, Brian Fick, Ruben Alfaro, Petra Hüntemeyer, Vikas Joshi, Hao Zhou, Hugo Alberto Ayala Solares, Lorenzo Diaz, Eucario Gonzalo Pérez Pérez, David Kieda, Samridha Kunwar, Armelle Jardin-Blicq, Brenda Dingus, Mateo Fernandez Alonso, Roberto Noriega-Papaqui, Jason Lee, Israel Martinez Castellanos, Dirk Lennarz, Daniel Omar Avila Rojas, Jorge Cotzomi, William H. Lee, Laura Olivera-Nieto, Pedro Miranda-Romagnoli, María Catalina Espinoza Hernández, Julie McEnery, Ramiro Torres Escobedo, Segev BenZvi, Daniel Rosa-Gonzalez, Gilgamesh Luis-Raya, Jorge Antonio Morales Soto, Nicola Omodei, Guillermo García-Torales, Arun Babu Kollamparambil, Chang Dong Rho, Kirsten Tollefson, Oscar Chaparro-Amaro, Arturo Iriarte, Ian Herzog, Anushka Udara Abeysekara, Francisco Salesa Greus, Joshua Wood, Hawc, Gwenael Giacinti, Michael Newbold, Humberto Ibarguen Salazar, Joe Lundeen, Alberto Carramiñana Alonso, Jose Luis García-Luna, Robert Ellsworth, Rhiannon Turner, Harm Schoorlemmer, Chad Brisbois, Umberto Cotti, Mehr Nisa, Sabrina Casanova, José Roberto Angeles Camacho, Ian James Watson, Kristi Engel, David Berley, Xiaojie Wang, Hazal Goksu, Diego Garcia Aguilar, Jorge Luis Flores, Ibrahim Torres, Dezhi Huang, Josefa Becerra Gonzalez, J. A. Goodman, Ernesto Belmont-Moreno, Jim Hinton, Sergio Hernández Cadena, Elijah Willox, Wayne Robert Springer, and Amid Nayerhoda
Subjects: Astrophysics, Blazar
Published: 2021
Full Text: View/download PDF

11. Studying High-Mass Microquasars with HAWC

Author: Eduardo Moreno Barbosa, Fernando Garfias, Thomas Weisgarber, Juan Carlos Díaz Vélez, Mora Durocher, Petra Hüntemeyer, Mateo Fernandez Alonso, Se Yeon Hwang, Brian Humensky, Armelle Jardin-Blicq, Hazal Goksu, Jesús Martínez-Castro, Dirk Lennarz, Francisco Salesa Greus, Andrea Albert, Joshua Wood, Jose Andres Garcia-Gonzalez, Juan Carlos Arteaga Velazquez, Meghan Tanner, Colas Rivière, Pooja Surajbali, Andrés Sandoval, Gus Sinnis, Fernando Ureña-Mena, Gaurang Yodh, J. Patrick Harding, Rhiannon Turner, Maria Magdalena González, Arnulfo Zepeda, Brian Fick, Sara Coutiño de Leon, Brenda Dingus, Daniel Omar Avila Rojas, Humberto Martínez Huerta, Chad Brisbois, Lorenzo Diaz, José Roberto Angeles Camacho, Kristi Engel, Karen S. Caballero Mora, Hannah Jhee, Gwenael Giacinti, Vikas Joshi, Eduardo de la Fuente, Edna Ruiz-Velasco, Eucario Gonzalo Pérez Pérez, Filiberto Hueyotl-Zahuantitla, Michael Schneider, Felix Werner, José Serna-Franco, Hugo Alberto Ayala Solares, Ke Fang, Wayne Robert Springer, Roberto Noriega-Papaqui, Nissim Illich Fraija, Gilgamesh Luis-Raya, Samridha Kunwar, Guillermo García-Torales, Arun Babu Kollamparambil, Diego Garcia Aguilar, Israel Martinez Castellanos, J. T. Linnemann, Kirsten Tollefson, Youngwan Son, Ignacio Taboada, Ruben Alfaro, Luis Villaseñor, Jorge Luis Flores, Ibrahim Torres, Alejandro Lara, Jorge Cotzomi, Ian Herzog, Amid Nayerhoda, Oscar Chaparro-Amaro, Jason Lee, Laura Olivera-Nieto, Michael Newbold, Ahron S. Barber, Daniel Rosa-Gonzalez, Jose Luis García-Luna, Michael DuVernois, Jason Fan, Hermes Leon Vargas, Robert Ellsworth, Michelle Hui, Umberto Cotti, Harm Schoorlemmer, Sabrina Casanova, Alison Peisker, Andrew James Smith, Rishi Babu, Kelly Malone, John Matthews, Henrike Fleischhack, David Berley, Xiaojie Wang, Oscar Martinez, Ruben Lopez-Coto, Vincent Marandon, Alberto Carramiñana, David Kieda, Yunior Pérez Araujo, Anna Lia Longinotti, Raquel Diaz Hernandez, Vardan Baghmanyan, Juan de Dios Álvarez Romero, William H. Lee, Julie McEnery, Chang Dong Rho, Humberto Ibarguen Salazar, Mehr Nisa, Ian James Watson, Dezhi Huang, Ernesto Belmont-Moreno, Jim Hinton, Sergio Hernández Cadena, Elijah Willox, Josefa Becerra Gonzalez, J. A. Goodman, James Ryan, Pedro Miranda-Romagnoli, Binita Hona, Lukas Nellen, Hao Zhou, Ramiro Torres Escobedo, Nicola Omodei, Arturo Iriarte, César Alvarez, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Tomás Capistrán, Hawc, Anushka Udara Abeysekara, Joe Lundeen, Miguel Mostafa, Cederik León de León, Segev BenZvi, and Gerd J. Kunde
Subjects: Physics, High mass, Astrophysics
Published: 2021
Full Text: View/download PDF

12. Modeling the non-flaring VHE emission from M87 as detected by the HAWC gamma ray observatory

Author: Dirk Lennarz, Segev BenZvi, Ian Herzog, Sara Coutiño de Leon, Francisco Salesa Greus, Joshua Wood, Andrea Albert, Hazal Goksu, Fernando Garfias, Eucario Gonzalo Pérez Pérez, Samridha Kunwar, Brian Humensky, Ramiro Torres Escobedo, Thomas Weisgarber, Israel Martinez Castellanos, Ke Fang, Arnulfo Zepeda, Nicola Omodei, Hannah Jhee, Tomás Capistrán Rojas, James Ryan, Kristi Engel, Humberto Ibarguen Salazar, Brian Fick, Lorenzo Diaz, Arturo Iriarte, Guillermo García-Torales, Arun Babu Kollamparambil, Gerd J. Kunde, Hugo Alberto Ayala Solares, Roberto Noriega-Papaqui, Josefa Becerra Gonzalez, Mehr Nisa, Laura Olivera-Nieto, Ian James Watson, Pooja Surajbali, Andrés Sandoval, Robert Ellsworth, Nissim Illich Fraija, Maria Magdalena González, Juan Carlos Arteaga Velazquez, Oscar Chaparro-Amaro, J. A. Goodman, Eduardo de la Fuente, Filiberto Hueyotl-Zahuantitla, Gus Sinnis, J. Patrick Harding, Humberto Martínez Huerta, Umberto Cotti, Jason Fan, Eduardo Moreno Barbosa, Ernesto Belmont-Moreno, Meghan Tanner, Jim Hinton, Alison Peisker, Andrew James Smith, Sabrina Casanova, Brenda Dingus, Fernando Ureña-Mena, Sergio Hernández Cadena, Colas Rivière, Ignacio Taboada, Henrike Fleischhack, Daniel Omar Avila Rojas, Jorge Cotzomi, Ruben Alfaro, Gaurang Yodh, Elijah Willox, David Kieda, Juan de Dios Álvarez Romero, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, William H. Lee, Anushka Udara Abeysekara, Julie McEnery, Ahron S. Barber, Karen S. Caballero Mora, Jason Lee, Diego Garcia Aguilar, Lukas Nellen, Rishi Babu, Kelly Malone, Hao Zhou, Jorge Luis Flores, Ibrahim Torres, Daniel Rosa-Gonzalez, Vincent Marandon, Alberto Carramiñana, Pedro Miranda-Romagnoli, Gwenael Giacinti, Jesús Martínez-Castro, Jose Luis García-Luna, Chang Dong Rho, Mora Durocher, Petra Hüntemeyer, Raquel Diaz Hernandez, Vardan Baghmanyan, Binita Hona, José Serna-Franco, Hermes Leon Vargas, Luis Villaseñor, Mateo Fernandez Alonso, Ruben Lopez-Coto, Michael Schneider, Fernando Ureña Mena, Felix Werner, Yunior Pérez Araujo, Anna Lia Longinotti, Edna Ruiz-Velasco, John Matthews, Miguel Mostafa, Cederik León de León, Jose Andres Garcia-Gonzalez, J. T. Linnemann, Oscar Martinez, Wayne Robert Springer, Amid Nayerhoda, Rhiannon Turner, Chad Brisbois, José Roberto Angeles Camacho, Juan Carlos Díaz Vélez, Armelle Jardin-Blicq, Harm Schoorlemmer, David Berley, Xiaojie Wang, Alejandro Lara, Michael DuVernois, Hawc, Vikas Joshi, Joe Lundeen, Gilgamesh Luis-Raya, Kirsten Tollefson, César Alvarez, Michael Newbold, Michelle Hui, and Dezhi Huang
Subjects: Physics, Radio galaxy, Observatory, Astrophysics::High Energy Astrophysical Phenomena, Broadband, Gamma ray, Spectral energy distribution, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Blazar, Virgo Cluster, Astrophysics::Galaxy Astrophysics, Cherenkov radiation
Abstract: M87 is a giant radio galaxy located in the Virgo Cluster, known to be a very high energy (VHE) gamma-ray source. As radio galaxies are considered the misaligned low-redshift counterparts of blazars, they are excellent laboratories for testing AGN emission models. M87 has been detected and monitored by Fermi-LAT and several atmospheric Cherenkov telescopes. Recently, the HAWC Collaboration presented marginal evidence of 4.5 year TeV gamma-ray emission from this object. The HAWC data has the potential to constrain the average VHE emission of sources of complex behavior, like M87, for which the physical origin of the VHE gamma-ray emission is still uncertain. We fitted a lepto-hadronic scenario to the broadband spectral energy distribution of M87 to model its non-flaring VHE emission using HAWC data.
Published: 2021
Full Text: View/download PDF

13. Study of the eHWC J1825-134 at the Highest Energy with HWAC

Author: James Ryan, Mora Durocher, Petra Hüntemeyer, Mateo Fernandez Alonso, Hannah Jhee, Dirk Lennarz, Maria Magdalena González, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Michael Newbold, Tomás Capistrán, Hazal Goksu, Anushka Udara Abeysekara, Alejandro Lara, Nissim Illich Fraija, Laura Olivera-Nieto, J. Patrick Harding, Brian Humensky, Eduardo de la Fuente, Miguel Mostafa, Ahron S. Barber, Humberto Martínez Huerta, Ignacio Taboada, Hawc, Michael DuVernois, Filiberto Hueyotl-Zahuantitla, Cederik León de León, Fernando Garfias, Hermes Leon Vargas, Pedro Miranda-Romagnoli, Ruben Alfaro, Andrea Albert, Jason Fan, Jose Andres Garcia-Gonzalez, Joe Lundeen, Thomas Weisgarber, Ian Herzog, Jason Lee, Vikas Joshi, Alison Peisker, Harm Schoorlemmer, Andrew James Smith, Juan Carlos Arteaga Velazquez, Daniel Rosa-Gonzalez, Jorge Cotzomi, Henrike Fleischhack, Meghan Tanner, Josefa Becerra Gonzalez, Francisco Salesa Greus, Colas Rivière, Lukas Nellen, Pooja Surajbali, Andrés Sandoval, Segev BenZvi, Michelle Hui, Gus Sinnis, Joshua Wood, Fernando Ureña-Mena, David Berley, Eucario Gonzalo Pérez Pérez, Gaurang Yodh, J. A. Goodman, Hao Zhou, Gilgamesh Luis-Raya, Dezhi Huang, Xiaojie Wang, Guillermo García-Torales, Kristi Engel, David Kieda, Hugo Alberto Ayala Solares, Rishi Babu, César Alvarez, Arun Babu Kollamparambil, Kelly Malone, Gwenael Giacinti, Luis Villaseñor, Binita Hona, Roberto Noriega-Papaqui, Michael Schneider, Kirsten Tollefson, Felix Werner, Samridha Kunwar, Vincent Marandon, Alberto Carramiñana, Ramiro Torres Escobedo, Israel Martinez Castellanos, Raquel Diaz Hernandez, Nicola Omodei, José Serna-Franco, Gerd J. Kunde, Sara Coutiño de Leon, Oscar Chaparro-Amaro, Juan Carlos Díaz Vélez, Vardan Baghmanyan, Ernesto Belmont-Moreno, Arturo Iriarte, Armelle Jardin-Blicq, Diego Garcia Aguilar, Jim Hinton, Wayne Robert Springer, John Matthews, Sergio Hernández Cadena, Jesús Martínez-Castro, Jorge Luis Flores, Ibrahim Torres, Jose Luis García-Luna, Arnulfo Zepeda, Oscar Martinez, Rhiannon Turner, Brian Fick, Robert Ellsworth, Lorenzo Diaz, Elijah Willox, J. T. Linnemann, Eduardo Moreno Barbosa, Edna Ruiz-Velasco, Chad Brisbois, Karen S. Caballero Mora, Umberto Cotti, Sabrina Casanova, José Roberto Angeles Camacho, Amid Nayerhoda, Ke Fang, Brenda Dingus, Daniel Omar Avila Rojas, Juan de Dios Álvarez Romero, William H. Lee, Julie McEnery, Chang Dong Rho, Ruben Lopez-Coto, Yunior Pérez Araujo, Anna Lia Longinotti, Humberto Ibarguen Salazar, Mehr Nisa, and Ian James Watson
Subjects: Physics, Observatory, Astrophysics::High Energy Astrophysical Phenomena, Molecular cloud, Hadron, Cutoff, Spectral energy distribution, High Energy Physics::Experiment, Cosmic ray, Astrophysics, Effects of high altitude on humans, Astrophysics::Galaxy Astrophysics, Cherenkov radiation
Abstract: eHWC J1825-134 is one of the brightest Galactic 𝛾-ray sources above 50 TeV observed by High Altitude Water Cherenkov 𝛾-Ray Observatory (HAWC). Detailed morphological studies have revealed a new point-like source inside this region with a spectral energy distribution extending beyond 200 TeV without any cutoff. These very-high-energy 𝛾 rays emission can originate from leptonic or hadronic processes. The new point-like source is located in a region containing PWNe and a high-density giant molecular cloud [MML2017]99. If the source emission is associated with the hadronic scenario the TeV 𝛾 rays may have been produced by cosmic rays colliding with ambient gas. If this were the case, eHWC J1825-134 is an indicator of the existence of a galactic PeVatron in the region that accelerates particles up to PeV energies.
Published: 2021
Full Text: View/download PDF

14. A GeV to TeV view of shell-type SNRs

Author: Miguel Mostafa, Cederik León de León, Brian Humensky, Gerd J. Kunde, Segev BenZvi, Mora Durocher, Petra Hüntemeyer, José Serna-Franco, Vikas Joshi, Ian Herzog, Hugo Alberto Ayala Solares, Mateo Fernandez Alonso, Hazal Goksu, Humberto Ibarguen Salazar, Roberto Noriega-Papaqui, Wayne Robert Springer, Binita Hona, Michelle Hui, Hawc, Jorge Cotzomi, Joshua A. Wood, Ahron S. Barber, Eduardo Moreno Barbosa, James Ryan, Jesús Martínez-Castro, Gilgamesh Luis-Raya, Rishi Babu, Joe Lundeen, J. T. Linnemann, Kelly Malone, Mehr Nisa, D. Berley, Dirk Lennarz, Kirsten Tollefson, Amid Nayerhoda, Vincent Marandon, Alberto Carramiñana, Alison Peisker, Samridha Kunwar, Ian James Watson, Michael Schneider, Andrew James Smith, Felix Werner, Raquel Diaz Hernandez, Vardan Baghmanyan, Oscar Chaparro-Amaro, Israel Martinez Castellanos, Gwenael Giacinti, Henrike Fleischhack, María Catalina Espinoza Hernández, David Kieda, Jorge Antonio Morales Soto, Tomás Capistrán, Pedro Miranda-Romagnoli, Juan Carlos Díaz Vélez, Laura Olivera-Nieto, Anushka Udara Abeysekara, Jose Andres Garcia-Gonzalez, Hermes Leon Vargas, Eucario Gonzalo Pérez Pérez, Fernando Garfias, Sara Coutiño de Leon, Arnulfo Zepeda, Hannah Jhee, César Alvarez, Armelle Jardin-Blicq, Brian Fick, Thomas Weisgarber, Lorenzo Diaz, Jose Luis García-Luna, Nissim Illich Fraija, Andrea Albert, Guillermo García-Torales, Arun Babu Kollamparambil, Ernesto Belmont-Moreno, Jim Hinton, Harm Schoorlemmer, Pooja Surajbali, Andrés Sandoval, Gus Sinnis, Michael Newbold, Sergio Hernández Cadena, Brenda Dingus, Juan Carlos Arteaga Velazquez, Fernando Ureña-Mena, Daniel Omar Avila Rojas, J. Patrick Harding, Karen S. Caballero Mora, Jason Fan, Meghan Tanner, Elijah Willox, Colas Rivière, Humberto Martínez Huerta, Ruben Lopez-Coto, G. B. Yodh, Dezhi Huang, Xiaojie Wang, Ke Fang, Yunior Pérez Araujo, Anna Lia Longinotti, Luis Villaseñor, Maria Magdalena González, Alejandro Lara, Ramiro Torres Escobedo, Robert Ellsworth, Juan de Dios Álvarez Romero, Nicola Omodei, Eduardo de la Fuente, Umberto Cotti, Josefa Becerra Gonzalez, Sabrina Casanova, Filiberto Hueyotl-Zahuantitla, Edna Ruiz-Velasco, Rhiannon Turner, J. A. Goodman, William H. Lee, Chad Brisbois, Michael DuVernois, Arturo Iriarte, Julie McEnery, John Matthews, Chang Dong Rho, Oscar Martinez, José Roberto Angeles Camacho, Francisco Salesa Greus, Kristi Engel, Diego Garcia Aguilar, Lukas Nellen, Hao Zhou, Jorge Luis Flores, Ibrahim Torres, Ignacio Taboada, Ruben Alfaro, Jason Lee, and Daniel Rosa-Gonzalez
Subjects: Physics, Shell (structure), Astrophysics, Type (model theory)
Published: 2021
Full Text: View/download PDF

15. Follow-up Analysis to Geminga's contribution to the Local Positron Excess with HAWC Gamma-Ray Observatory

Author: Alison Peisker, Andrew James Smith, Henrike Fleischhack, Eucario Gonzalo Pérez Pérez, Jorge Cotzomi, Guillermo García-Torales, Arun Babu Kollamparambil, Ian Herzog, Segev BenZvi, James Ryan, Hannah Jhee, J. Patrick Harding, Rishi Babu, Kelly Malone, Humberto Martínez Huerta, Josefa Becerra Gonzalez, Andrea Albert, Mattia Di Mauro, Vincent Marandon, Alberto Carramiñana, Ramiro Torres Escobedo, Karen S. Caballero Mora, Jose Luis García-Luna, Hawc, J. A. Goodman, Nicola Omodei, Samridha Kunwar, Fernando Garfias, Brenda Dingus, Michael Newbold, Ruben Lopez-Coto, Laura Olivera-Nieto, Raquel Diaz Hernandez, Vardan Baghmanyan, Israel Martinez Castellanos, Pooja Surajbali, Andrés Sandoval, Robert Ellsworth, Juan Carlos Arteaga Velazquez, Daniel Omar Avila Rojas, Michael Schneider, Gus Sinnis, Yunior Pérez Araujo, Nissim Illich Fraija, Arturo Iriarte, Joe Lundeen, Felix Werner, Anna Lia Longinotti, Meghan Tanner, Thomas Weisgarber, Colas Rivière, Fernando Ureña-Mena, Dezhi Huang, Binita Hona, Brian Humensky, Tomás Capistrán Rojas, Umberto Cotti, Edna Ruiz-Velasco, Gaurang Yodh, Juan de Dios Álvarez Romero, Maria Magdalena González, César Alvarez, Gwenael Giacinti, Eduardo Moreno Barbosa, William H. Lee, Sabrina Casanova, Gerd J. Kunde, Julie McEnery, Jason Fan, María Catalina Espinoza Hernández, Chang Dong Rho, Jorge Antonio Morales Soto, Diego Garcia Aguilar, Vikas Joshi, Humberto Ibarguen Salazar, Eduardo de la Fuente, Anushka Udara Abeysekara, José Serna-Franco, Filiberto Hueyotl-Zahuantitla, Mehr Nisa, Ian James Watson, Jorge Luis Flores, Ibrahim Torres, Jose Andres Garcia-Gonzalez, Hugo Alberto Ayala Solares, Lukas Nellen, Hazal Goksu, Hao Zhou, Gilgamesh Luis-Raya, J. T. Linnemann, Arnulfo Zepeda, Wayne Robert Springer, Mora Durocher, Luis Villaseñor, Jesús Martínez-Castro, Roberto Noriega-Papaqui, Kirsten Tollefson, Brian Fick, Lorenzo Diaz, Petra Hüntemeyer, David Kieda, Ke Fang, Ernesto Belmont-Moreno, Mateo Fernandez Alonso, Jim Hinton, Juan Carlos Díaz Vélez, Sergio Hernández Cadena, Miguel Mostafa, Cederik León de León, Amid Nayerhoda, Armelle Jardin-Blicq, Oscar Chaparro-Amaro, Ahron S. Barber, Elijah Willox, Pedro Miranda-Romagnoli, Rhiannon Turner, Chad Brisbois, José Roberto Angeles Camacho, Francisco Salesa Greus, Joshua Wood, Sara Coutiño de Leon, Hermes Leon Vargas, Kristi Engel, John Matthews, Alejandro Lara, Dirk Lennarz, Oscar Martinez, Michael DuVernois, Ignacio Taboada, Ruben Alfaro, Michelle Hui, Harm Schoorlemmer, Jason Lee, Daniel Rosa-Gonzalez, David Berley, and Xiaojie Wang
Subjects: Physics, Positron, Observatory, Gamma ray, Astrophysics
Published: 2021
Full Text: View/download PDF

16. Galactic Cosmic Ray increase associated to an interplanetary magnetic cloud observed by HAWC

Author: María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Tomás Capistrán, Anushka Udara Abeysekara, Andrea Albert, Harm Schoorlemmer, Dirk Lennarz, Francisco Salesa Greus, Juan Carlos Arteaga Velazquez, Brian Humensky, David Berley, Laura Olivera-Nieto, J. Patrick Harding, Humberto Martínez Huerta, Meghan Tanner, Hannah Jhee, Joshua Wood, Colas Rivière, Xiaojie Wang, Brenda Dingus, Daniel Omar Avila Rojas, Hugo Alberto Ayala Solares, Ramiro Torres Escobedo, Diego Garcia Aguilar, Mora Durocher, Rishi Babu, Roberto Noriega-Papaqui, Hawc, Petra Hüntemeyer, Kelly Malone, Edna Ruiz-Velasco, Eduardo Moreno Barbosa, Nicola Omodei, Nissim Illich Fraija, James Ryan, Kristi Engel, Vincent Marandon, Alberto Carramiñana, Arturo Iriarte, Sara Coutiño de Leon, Josefa Becerra Gonzalez, Miguel Mostafa, Oscar Chaparro-Amaro, Alison Peisker, Cederik León de León, Joe Lundeen, Jorge Luis Flores, Ibrahim Torres, Jason Fan, Raquel Diaz Hernandez, Vardan Baghmanyan, Michelle Hui, Mateo Fernandez Alonso, José Serna-Franco, Arnulfo Zepeda, Brian Fick, Lorenzo Diaz, Rhiannon Turner, Andrew James Smith, Fernando Garfias, Hermes Leon Vargas, Samridha Kunwar, J. A. Goodman, Israel Martinez Castellanos, Thomas Weisgarber, Chad Brisbois, Ke Fang, Henrike Fleischhack, J. T. Linnemann, David Kieda, Lukas Nellen, Hao Zhou, Alejandro Lara, Gerd J. Kunde, Luis Villaseñor, Ernesto Belmont-Moreno, César Alvarez, Gwenael Giacinti, Michael DuVernois, Jim Hinton, Jorge Cotzomi, Jose Andres Garcia-Gonzalez, Hazal Goksu, Ahron S. Barber, John Matthews, José Roberto Angeles Camacho, Jesús Martínez-Castro, Sergio Hernández Cadena, Eucario Gonzalo Pérez Pérez, Oscar Martinez, Segev BenZvi, Elijah Willox, Guillermo García-Torales, Arun Babu Kollamparambil, Karen S. Caballero Mora, Jose Luis García-Luna, Ignacio Taboada, Pooja Surajbali, Andrés Sandoval, Robert Ellsworth, Dezhi Huang, Ruben Alfaro, Gus Sinnis, Juan Carlos Díaz Vélez, Jason Lee, Fernando Ureña-Mena, Umberto Cotti, Daniel Rosa-Gonzalez, Armelle Jardin-Blicq, Gaurang Yodh, Sabrina Casanova, Binita Hona, Michael Schneider, Felix Werner, Ian Herzog, Wayne Robert Springer, Maria Magdalena González, Vikas Joshi, Eduardo de la Fuente, Filiberto Hueyotl-Zahuantitla, Amid Nayerhoda, Gilgamesh Luis-Raya, Kirsten Tollefson, Ruben Lopez-Coto, Michael Newbold, Yunior Pérez Araujo, Anna Lia Longinotti, Juan de Dios Álvarez Romero, William H. Lee, Julie McEnery, Chang Dong Rho, Humberto Ibarguen Salazar, Mehr Nisa, Pedro Miranda-Romagnoli, and Ian James Watson
Subjects: Physics, Range (particle radiation), Astrophysics::High Energy Astrophysical Phenomena, Physics::Space Physics, Flux, Cosmic ray, Astrophysics, Magnetic cloud, Interplanetary spaceflight, Anisotropy, Magnetic flux, Magnetic field
Abstract: We present the observation of an anomalous increment of the galactic cosmic ray (GCR) flux observed by the HAWC array during October 2016. We propose that this anisotropy of the GCR flux was caused by a magnetic flux rope (MFR) i. e., by the helicoidal magnetic field of an interplanetary coronal mass ejection observed at 1 AU at the same time. We computed the trajectory of protons with energy in the range of 10 to 60 GeV, traveling inside the helicoidal magnetic field observed in situ. The direction of these particles changes towards the axis of the MFR resulting in an anisotropy of the GCR flux along this axis. This model shows that the alignment between the MFR axis and the HAWC s asymptotic direction, combined with the high sensitivity of HAWC, allowed us to observe the effect of the passage of the MFR on the GCR flux. We present the HAWC observation associated with the passage of the MFR as well as the helio- spheric circumstances around such phenomenon.
Published: 2021
Full Text: View/download PDF

17. Reconstruction of Nearly-Horizontal Muons in the HAWC Observatory

Author: Ernesto Belmont-Moreno, Jim Hinton, Sergio Hernández Cadena, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Tomás Capistrán, Harm Schoorlemmer, Anushka Udara Abeysekara, Dirk Lennarz, Elijah Willox, Brian Humensky, David Berley, Hazal Goksu, Hawc, Dezhi Huang, Gerd J. Kunde, Xiaojie Wang, Robert Ellsworth, J. Patrick Harding, Humberto Martínez Huerta, Jesús Martínez-Castro, Gwenael Giacinti, Joe Lundeen, Ian Herzog, Eduardo Moreno Barbosa, Umberto Cotti, Hugo Alberto Ayala Solares, Alejandro Lara, Wayne Robert Springer, Sabrina Casanova, César Alvarez, Ramiro Torres Escobedo, Andrea Albert, Pedro Miranda-Romagnoli, Mora Durocher, Roberto Noriega-Papaqui, Michael Schneider, Felix Werner, Michael DuVernois, Nicola Omodei, Petra Hüntemeyer, Eucario Gonzalo Pérez Pérez, Juan Carlos Arteaga Velazquez, Meghan Tanner, Miguel Mostafa, Josefa Becerra Gonzalez, Cederik León de León, Arturo Iriarte, Mateo Fernandez Alonso, Hermes Leon Vargas, Michelle Hui, Ke Fang, Colas Rivière, J. A. Goodman, Ruben Lopez-Coto, Vikas Joshi, Amid Nayerhoda, Yunior Pérez Araujo, Ahron S. Barber, Anna Lia Longinotti, Segev BenZvi, Guillermo García-Torales, Arun Babu Kollamparambil, Samridha Kunwar, Israel Martinez Castellanos, Jorge Cotzomi, Sara Coutiño de Leon, Laura Olivera-Nieto, Maria Magdalena González, Gilgamesh Luis-Raya, Arnulfo Zepeda, Brian Fick, Kirsten Tollefson, Fernando Garfias, Jose Andres Garcia Gonzalez, Lorenzo Diaz, Binita Hona, David Kieda, Thomas Weisgarber, Brenda Dingus, Humberto Ibarguen Salazar, Lukas Nellen, Eduardo de la Fuente, Daniel Omar Avila Rojas, Hao Zhou, José Serna-Franco, Alison Peisker, Filiberto Hueyotl-Zahuantitla, Rishi Babu, Jose Luis García-Luna, Michael Newbold, Kelly Malone, Pooja Surajbali, Andrés Sandoval, Gus Sinnis, Diego Garcia Aguilar, Andrew James Smith, Hannah Jhee, Vincent Marandon, Alberto Carramiñana, Fernando Ureña-Mena, Raquel Diaz Hernandez, Vardan Baghmanyan, Gaurang Yodh, Mehr Nisa, Nissim Illich Fraija, Henrike Fleischhack, Edna Ruiz-Velasco, Jorge Luis Flores, Ibrahim Torres, J. T. Linnemann, James Ryan, Ian James Watson, Jason Fan, Juan Carlos Díaz Vélez, Armelle Jardin-Blicq, Juan de Dios Álvarez Romero, William H. Lee, Julie McEnery, Chang Dong Rho, Rhiannon Turner, Chad Brisbois, José Roberto Angeles Camacho, Luis Villaseñor, Karen S. Caballero Mora, Francisco Salesa Greus, Joshua Wood, Kristi Engel, John Matthews, Oscar Martinez, Ignacio Taboada, Ruben Alfaro, Jason Lee, and Daniel Rosa-Gonzalez
Subjects: Muon, Observatory, Astronomy, Geology
Published: 2021
Full Text: View/download PDF

18. Spectral and Energy Morphology Analysis Study of HAWC J2031+415

Author: Ian Herzog, Wayne Robert Springer, Rhiannon Turner, Chad Brisbois, James Ryan, Amid Nayerhoda, José Roberto Angeles Camacho, Dirk Lennarz, Ruben Lopez-Coto, Luis Villaseñor, Robert Ellsworth, Segev BenZvi, Yunior Pérez Araujo, Anna Lia Longinotti, Brian Humensky, Andrea Albert, Umberto Cotti, Juan Carlos Arteaga Velazquez, Harm Schoorlemmer, Juan de Dios Álvarez Romero, Karen S. Caballero Mora, Sabrina Casanova, Dezhi Huang, Eucario Gonzalo Pérez Pérez, Meghan Tanner, Colas Rivière, Laura Olivera-Nieto, Samridha Kunwar, Israel Martinez Castellanos, Pooja Surajbali, Andrés Sandoval, Gus Sinnis, Hugo Alberto Ayala Solares, David Berley, Roberto Noriega-Papaqui, Miguel Mostafa, Maria Magdalena González, Guillermo García-Torales, Fernando Ureña-Mena, Cederik León de León, Arun Babu Kollamparambil, Gaurang Yodh, Brenda Dingus, Hawc, Eduardo de la Fuente, Hermes Leon Vargas, Binita Hona, Xiaojie Wang, Ke Fang, Filiberto Hueyotl-Zahuantitla, Jesús Martínez-Castro, Daniel Omar Avila Rojas, Mora Durocher, Petra Hüntemeyer, Lukas Nellen, Michelle Hui, Hao Zhou, Oscar Chaparro-Amaro, Mateo Fernandez Alonso, Ernesto Belmont-Moreno, Jim Hinton, Sergio Hernández Cadena, J. Patrick Harding, Humberto Martínez Huerta, Alison Peisker, Andrew James Smith, Joe Lundeen, Fernando Garfias, Ramiro Torres Escobedo, Elijah Willox, Sara Coutiño de Leon, Henrike Fleischhack, Nicola Omodei, Thomas Weisgarber, Gwenael Giacinti, Arturo Iriarte, Jorge Cotzomi, Eduardo Moreno Barbosa, Josefa Becerra Gonzalez, José Serna-Franco, J. A. Goodman, Edna Ruiz-Velasco, Juan Carlos Díaz Vélez, Gerd J. Kunde, Armelle Jardin-Blicq, Jose Luis García-Luna, Ahron S. Barber, J. T. Linnemann, Alejandro Lara, Rishi Babu, Kelly Malone, Hazal Goksu, Michael DuVernois, Vincent Marandon, Alberto Carramiñana, Jose Andres Garcia-Gonzalez, David Kieda, Michael Newbold, Hannah Jhee, Nissim Illich Fraija, Jason Fan, Vikas Joshi, Gilgamesh Luis-Raya, Diego Garcia Aguilar, Jorge Luis Flores, Ibrahim Torres, Kirsten Tollefson, Raquel Diaz Hernandez, Vardan Baghmanyan, John Matthews, Oscar Martinez, Francisco Salesa Greus, Joshua Wood, Kristi Engel, Ignacio Taboada, Ruben Alfaro, Jason Lee, Daniel Rosa-Gonzalez, Pedro Miranda-Romagnoli, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Tomás Capistrán, Anushka Udara Abeysekara, César Alvarez, Michael Schneider, Felix Werner, Arnulfo Zepeda, Brian Fick, Lorenzo Diaz, William H. Lee, Julie McEnery, Chang Dong Rho, Humberto Ibarguen Salazar, Mehr Nisa, and Ian James Watson
Subjects: Physics, Range (particle radiation), Star cluster, OB star, Observatory, Astrophysics::High Energy Astrophysical Phenomena, Cluster (physics), Cygnus OB2, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Pulsar wind nebula, Astrophysics::Galaxy Astrophysics, Cherenkov radiation
Abstract: The Cygnus Cocoon region is a complex region containing an OB star cluster that is prominent in the TeV energy range. Located in this region is 3HWC J2031+415, a significant TeV gamma-ray source whose emission is possibly associated with 2 components, the Cygnus OB2 star cluster and a pulsar wind nebula (PWN). In this work, several modelling methods are presented to best describe the emission. These models disentangle emission believed to be from the Cocoon and isolate the component emitted by the probable PWN. I will present several spectral models to describe the emission of the probable PWN using the latest data set from the High-Altitude Water Cherenkov (HAWC) observatory. Furthermore, I will present an energy morphology study of the PWN component of 3HWC J2031+415 in distinct energy bands.
Published: 2021
Full Text: View/download PDF

19. A search for spectral hardening in HAWC sources above 56 TeV

Author: Mora Durocher, Petra Hüntemeyer, Dirk Lennarz, Mateo Fernandez Alonso, Hugo Alberto Ayala Solares, Wayne Robert Springer, Roberto Noriega-Papaqui, Pooja Surajbali, Andrés Sandoval, Ernesto Belmont-Moreno, Gus Sinnis, Jim Hinton, Fernando Ureña-Mena, Sergio Hernández Cadena, Gaurang Yodh, Eucario Gonzalo Pérez Pérez, Laura Olivera-Nieto, Jose Andres Garcia-Gonzalez, Oscar Chaparro-Amaro, Brian Humensky, Elijah Willox, Jesús Martínez-Castro, Michael Newbold, Guillermo García-Torales, Arun Babu Kollamparambil, Amid Nayerhoda, Pedro Miranda-Romagnoli, Humberto Ibarguen Salazar, Hawc, James Ryan, Juan Carlos Díaz Vélez, Fernando Garfias, Armelle Jardin-Blicq, Andrea Albert, Thomas Weisgarber, Mehr Nisa, Joe Lundeen, Josefa Becerra Gonzalez, Ian James Watson, Diego Garcia Aguilar, Juan Carlos Arteaga Velazquez, Ramiro Torres Escobedo, Robert Ellsworth, Vikas Joshi, Harm Schoorlemmer, Michelle Hui, Miguel Mostafa, J. A. Goodman, Meghan Tanner, Jorge Luis Flores, Ibrahim Torres, Cederik León de León, Nicola Omodei, Colas Rivière, Alison Peisker, Andrew James Smith, Rhiannon Turner, David Kieda, César Alvarez, Chad Brisbois, Arturo Iriarte, Samridha Kunwar, David Berley, Umberto Cotti, Dezhi Huang, Henrike Fleischhack, Hazal Goksu, Gilgamesh Luis-Raya, Kirsten Tollefson, Israel Martinez Castellanos, Xiaojie Wang, Ahron S. Barber, Rishi Babu, Kelly Malone, Vincent Marandon, Alberto Carramiñana, Sabrina Casanova, José Roberto Angeles Camacho, Gerd J. Kunde, Karen S. Caballero Mora, Juan de Dios Álvarez Romero, Michael Schneider, Felix Werner, Binita Hona, Raquel Diaz Hernandez, Vardan Baghmanyan, William H. Lee, Hannah Jhee, Julie McEnery, Sara Coutiño de Leon, Chang Dong Rho, Edna Ruiz-Velasco, Nissim Illich Fraija, Segev BenZvi, Ruben Lopez-Coto, Luis Villaseñor, Jason Fan, Yunior Pérez Araujo, Arnulfo Zepeda, Ke Fang, Anna Lia Longinotti, Lukas Nellen, Ignacio Taboada, Brian Fick, Lorenzo Diaz, Alejandro Lara, J. Patrick Harding, Hao Zhou, Michael DuVernois, Ruben Alfaro, Humberto Martínez Huerta, Jorge Cotzomi, Jason Lee, Daniel Rosa-Gonzalez, Jose Luis García-Luna, John Matthews, Oscar Martinez, Francisco Salesa Greus, Joshua Wood, Kristi Engel, Eduardo Moreno Barbosa, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Tomás Capistrán, Anushka Udara Abeysekara, Maria Magdalena González, Eduardo de la Fuente, Filiberto Hueyotl-Zahuantitla, Ian Herzog, Hermes Leon Vargas, Brenda Dingus, Daniel Omar Avila Rojas, José Serna-Franco, J. T. Linnemann, and Gwenael Giacinti
Subjects: Physics, Spectral index, Observatory, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Hardening (metallurgy), Gamma ray, Astrophysics, Cherenkov radiation
Abstract: The High Altitude Water Cherenkov (HAWC) Observatory is a wide-field-of-view gamma-ray observatory that is optimized to detect gamma rays between ~300 GeV and several hundred TeV. The HAWC Collaboration recently released their third source catalog (3HWC), which contains 65 sources. One of these sources, the ultra-high-energy gamma-ray source 3HWC J1908+063, may exhibit a hardening of the spectral index at the highest energies (above 56 TeV). At least two populations of particles are needed to satisfactorily explain the highest energy emission. This second component could be leptonic or hadronic in origin. If it is hadronic in origin, it would imply the presence of protons with energies up to $\sim$1 PeV near the source. We have searched other 3HWC sources for the presence of this spectral hardening feature. If observed, this would imply that the sources could make good PeVatron candidates.
Published: 2021
Full Text: View/download PDF

20. Particle Acceleration in the Cygnus Superbubble

Author: Sara Coutiño de Leon, Hazal Goksu, Francisco Salesa Greus, Gwenael Giacinti, Joshua Wood, Eucario Gonzalo Pérez Pérez, Rishi Babu, Samridha Kunwar, Vikas Joshi, Kelly Malone, Israel Martinez Castellanos, Kristi Engel, Binita Hona, Michael Newbold, Vincent Marandon, Ian Herzog, Segev BenZvi, Guillermo García-Torales, Arun Babu Kollamparambil, Alberto Carramiñana, Ernesto Belmont-Moreno, Gilgamesh Luis-Raya, Kirsten Tollefson, Rhiannon Turner, Harm Schoorlemmer, Chad Brisbois, Robert Ellsworth, Eduardo Moreno Barbosa, Jim Hinton, Michelle Hui, Raquel Diaz Hernandez, Vardan Baghmanyan, Brenda Dingus, Wayne Robert Springer, James Ryan, Fernando Garfias, Daniel Omar Avila Rojas, Sergio Hernández Cadena, José Roberto Angeles Camacho, J. Patrick Harding, John Matthews, Humberto Martínez Huerta, David Berley, Arnulfo Zepeda, Umberto Cotti, Brian Fick, José Serna-Franco, Thomas Weisgarber, Oscar Martinez, Jesús Martínez-Castro, Amid Nayerhoda, Lorenzo Diaz, Xiaojie Wang, Alison Peisker, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Sabrina Casanova, Tomás Capistrán, Elijah Willox, Andrew James Smith, Diego Garcia Aguilar, Gerd J. Kunde, J. T. Linnemann, Andrea Albert, Henrike Fleischhack, Dezhi Huang, Jorge Luis Flores, Ibrahim Torres, Ignacio Taboada, Alejandro Lara, Dirk Lennarz, Ruben Alfaro, Juan Carlos Arteaga Velazquez, Anushka Udara Abeysekara, Jorge Cotzomi, Meghan Tanner, Hermes Leon Vargas, Colas Rivière, Jason Lee, Laura Olivera-Nieto, Michael DuVernois, Edna Ruiz-Velasco, Daniel Rosa-Gonzalez, Hugo Alberto Ayala Solares, Michael Schneider, Juan Carlos Díaz Vélez, Armelle Jardin-Blicq, Miguel Mostafa, Felix Werner, Cederik León de León, Roberto Noriega-Papaqui, Jose Luis García-Luna, Ramiro Torres Escobedo, Nicola Omodei, Arturo Iriarte, Ke Fang, César Alvarez, Pedro Miranda-Romagnoli, Oscar Chaparro-Amaro, Josefa Becerra Gonzalez, J. A. Goodman, Lukas Nellen, Maria Magdalena González, Hao Zhou, Eduardo de la Fuente, Hawc, Filiberto Hueyotl-Zahuantitla, Ahron S. Barber, Joe Lundeen, Jose Andres Garcia-Gonzalez, Pooja Surajbali, Andrés Sandoval, Gus Sinnis, Hannah Jhee, Fernando Ureña-Mena, Nissim Illich Fraija, Brian Humensky, Gaurang Yodh, Jason Fan, Mora Durocher, Petra Hüntemeyer, Mateo Fernandez Alonso, David Kieda, Luis Villaseñor, Karen S. Caballero Mora, Juan de Dios Álvarez Romero, William H. Lee, Julie McEnery, Chang Dong Rho, Humberto Ibarguen Salazar, Mehr Nisa, Ian James Watson, Ruben Lopez-Coto, Yunior Pérez Araujo, and Anna Lia Longinotti
Subjects: Particle acceleration, Physics, Superbubble, Astrophysics
Published: 2021
Full Text: View/download PDF

21. Study of the morphology of the region surrounding eHWC J1850+001

Author: Fernando Garfias, Thomas Weisgarber, Alison Peisker, Andrew James Smith, Alejandro Lara, Rhiannon Turner, Henrike Fleischhack, Chad Brisbois, Michael DuVernois, Wayne Robert Springer, José Roberto Angeles Camacho, Amid Nayerhoda, Pedro Miranda-Romagnoli, Hazal Goksu, Hannah Jhee, Samridha Kunwar, Israel Martinez Castellanos, Dirk Lennarz, Humberto Ibarguen Salazar, Ramiro Torres Escobedo, Nicola Omodei, Rishi Babu, Kelly Malone, Harm Schoorlemmer, Arturo Iriarte, Hugo Alberto Ayala Solares, Jorge Cotzomi, Ian Herzog, Vincent Marandon, Alberto Carramiñana, Pooja Surajbali, Andrés Sandoval, Nissim Illich Fraija, Eucario Gonzalo Pérez Pérez, Mehr Nisa, Juan Carlos Díaz Vélez, Roberto Noriega-Papaqui, Ian James Watson, Gus Sinnis, Raquel Diaz Hernandez, Vardan Baghmanyan, Armelle Jardin-Blicq, Michael Newbold, Hawc, Gwenael Giacinti, Fernando Ureña-Mena, Gaurang Yodh, Edna Ruiz-Velasco, Andrea Albert, Guillermo García-Torales, Arun Babu Kollamparambil, John Matthews, David Berley, Oscar Chaparro-Amaro, Joe Lundeen, Jason Fan, Jose Luis García-Luna, Mora Durocher, Xiaojie Wang, Oscar Martinez, Petra Hüntemeyer, Juan Carlos Arteaga Velazquez, Mateo Fernandez Alonso, Diego Garcia Aguilar, Michelle Hui, J. Patrick Harding, Humberto Martínez Huerta, Meghan Tanner, María Catalina Espinoza Hernández, Maria Magdalena González, Colas Rivière, Ke Fang, Jorge Antonio Morales Soto, Tomás Capistrán, Ruben Lopez-Coto, Jorge Luis Flores, Ibrahim Torres, Francisco Salesa Greus, Joshua Wood, Hermes Leon Vargas, Sara Coutiño de Leon, Ahron S. Barber, Yunior Pérez Araujo, Anna Lia Longinotti, César Alvarez, Lukas Nellen, Hao Zhou, Eduardo de la Fuente, Anushka Udara Abeysekara, David Kieda, Brenda Dingus, Daniel Omar Avila Rojas, José Serna-Franco, Michael Schneider, Binita Hona, Filiberto Hueyotl-Zahuantitla, Felix Werner, Robert Ellsworth, Kristi Engel, Vikas Joshi, Umberto Cotti, Juan de Dios Álvarez Romero, Sabrina Casanova, Jose Andres Garcia-Gonzalez, Jesús Martínez-Castro, James Ryan, William H. Lee, Julie McEnery, Ignacio Taboada, Chang Dong Rho, J. T. Linnemann, Gilgamesh Luis-Raya, Arnulfo Zepeda, Laura Olivera-Nieto, Kirsten Tollefson, Ruben Alfaro, Brian Fick, Lorenzo Diaz, Jason Lee, Daniel Rosa-Gonzalez, Eduardo Moreno Barbosa, Luis Villaseñor, Brian Humensky, Dezhi Huang, Karen S. Caballero Mora, Josefa Becerra Gonzalez, J. A. Goodman, Ernesto Belmont-Moreno, Jim Hinton, Sergio Hernández Cadena, Elijah Willox, Segev BenZvi, Miguel Mostafa, Cederik León de León, and Gerd J. Kunde
Subjects: Morphology (linguistics), Materials science, Biophysics
Published: 2021
Full Text: View/download PDF

22. Characterizing gamma-ray sources with HAL (HAWC Accelerated likelihood) and 3ML

Author: Hannah Jhee, Josefa Becerra Gonzalez, Nissim Illich Fraija, J. A. Goodman, Arnulfo Zepeda, Brian Fick, Lorenzo Diaz, José Serna-Franco, Jason Fan, Eucario Gonzalo Pérez Pérez, Diego Garcia Aguilar, Edna Ruiz-Velasco, Jorge Luis Flores, Ibrahim Torres, J. T. Linnemann, Guillermo García-Torales, Arun Babu Kollamparambil, Eduardo Moreno Barbosa, Wayne Robert Springer, Ernesto Belmont-Moreno, Hazal Goksu, Juan Carlos Díaz Vélez, Binita Hona, David Kieda, Jim Hinton, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Tomás Capistrán, Armelle Jardin-Blicq, Jorge Cotzomi, Harm Schoorlemmer, Sergio Hernández Cadena, Brian Humensky, Rishi Babu, Anushka Udara Abeysekara, Kelly Malone, Amid Nayerhoda, Jesús Martínez-Castro, Fernando Garfias, James Ryan, Gwenael Giacinti, Vincent Marandon, Alberto Carramiñana, Samridha Kunwar, Jose Luis García-Luna, Elijah Willox, Alison Peisker, Thomas Weisgarber, Michael Schneider, Raquel Diaz Hernandez, Andrew James Smith, Israel Martinez Castellanos, Ruben Lopez-Coto, Vardan Baghmanyan, David Berley, Felix Werner, Lukas Nellen, Dezhi Huang, Robert Ellsworth, Henrike Fleischhack, Yunior Pérez Araujo, Anna Lia Longinotti, Hao Zhou, Xiaojie Wang, Hermes Leon Vargas, Michael Newbold, Umberto Cotti, Rhiannon Turner, Hugo Alberto Ayala Solares, Sabrina Casanova, Chad Brisbois, J. Patrick Harding, Roberto Noriega-Papaqui, Humberto Martínez Huerta, José Roberto Angeles Camacho, Vikas Joshi, Juan de Dios Álvarez Romero, Alejandro Lara, Ramiro Torres Escobedo, Brenda Dingus, Jose Andres Garcia-Gonzalez, Oscar Chaparro-Amaro, Nicola Omodei, Andrea Albert, Ahron S. Barber, Ke Fang, Karen S. Caballero Mora, William H. Lee, Daniel Omar Avila Rojas, Arturo Iriarte, Juan Carlos Arteaga Velazquez, Laura Olivera-Nieto, Julie McEnery, Michael DuVernois, Chang Dong Rho, Meghan Tanner, Gilgamesh Luis-Raya, Colas Rivière, Kirsten Tollefson, Humberto Ibarguen Salazar, Mehr Nisa, Ian James Watson, Sara Coutiño de Leon, Luis Villaseñor, Pooja Surajbali, Andrés Sandoval, Gus Sinnis, Fernando Ureña-Mena, Gaurang Yodh, Mora Durocher, Petra Hüntemeyer, Mateo Fernandez Alonso, Ignacio Taboada, Ruben Alfaro, Jason Lee, Daniel Rosa-Gonzalez, Francisco Salesa Greus, Joshua Wood, Kristi Engel, John Matthews, Pedro Miranda-Romagnoli, Oscar Martinez, Dirk Lennarz, Michelle Hui, Gerd J. Kunde, Maria Magdalena González, Segev BenZvi, Eduardo de la Fuente, Filiberto Hueyotl-Zahuantitla, Ian Herzog, Miguel Mostafa, Cederik León de León, César Alvarez, Hawc, and Joe Lundeen
Subjects: Physics, Gamma ray, Astrophysics
Published: 2021
Full Text: View/download PDF

23. Search for TeV decaying dark matter from the Virgo cluster of galaxies

Author: Wayne Robert Springer, Mora Durocher, Petra Hüntemeyer, Mateo Fernandez Alonso, Ernesto Belmont-Moreno, Jim Hinton, Amid Nayerhoda, Laura Olivera-Nieto, Hugo Alberto Ayala Solares, Sergio Hernández Cadena, Elijah Willox, Michelle Hui, Francisco Salesa Greus, Joshua Wood, Michael Schneider, Pedro Miranda-Romagnoli, Felix Werner, Brian Humensky, Roberto Noriega-Papaqui, Hawc, Hermes Leon Vargas, José Serna-Franco, Edna Ruiz-Velasco, Kristi Engel, Alison Peisker, Michael Newbold, Hannah Jhee, Josefa Becerra Gonzalez, Joe Lundeen, Lukas Nellen, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Oscar Chaparro-Amaro, Juan de Dios Álvarez Romero, Dirk Lennarz, Tomás Capistrán, Andrew James Smith, J. T. Linnemann, Anushka Udara Abeysekara, J. A. Goodman, Hao Zhou, Pooja Surajbali, Andrés Sandoval, Binita Hona, Sara Coutiño de Leon, Henrike Fleischhack, Nissim Illich Fraija, Vikas Joshi, William H. Lee, Dezhi Huang, Ignacio Taboada, Julie McEnery, Ian Herzog, Gus Sinnis, Chang Dong Rho, César Alvarez, Ruben Alfaro, Rhiannon Turner, Chad Brisbois, Diego Garcia Aguilar, Fernando Garfias, Fernando Ureña-Mena, Gaurang Yodh, Eduardo Moreno Barbosa, Ramiro Torres Escobedo, Jason Fan, Gwenael Giacinti, Gilgamesh Luis-Raya, Thomas Weisgarber, Nicola Omodei, James Ryan, Humberto Ibarguen Salazar, Jason Lee, Jorge Luis Flores, Kirsten Tollefson, José Roberto Angeles Camacho, Ibrahim Torres, Eucario Gonzalo Pérez Pérez, Daniel Rosa-Gonzalez, Samridha Kunwar, Israel Martinez Castellanos, Arnulfo Zepeda, Arturo Iriarte, Alejandro Lara, Brian Fick, Jose Andres Garcia-Gonzalez, Lorenzo Diaz, Mehr Nisa, Karen S. Caballero Mora, Ian James Watson, Michael DuVernois, David Kieda, Guillermo García-Torales, Arun Babu Kollamparambil, J. Patrick Harding, Humberto Martínez Huerta, Maria Magdalena González, John Matthews, Gerd J. Kunde, Brenda Dingus, Harm Schoorlemmer, Daniel Omar Avila Rojas, Oscar Martinez, Eduardo de la Fuente, M. U. Nisa, Luis Villaseñor, David Berley, Hazal Goksu, Miguel Mostafa, Filiberto Hueyotl-Zahuantitla, Xiaojie Wang, Cederik León de León, Segev BenZvi, Juan Carlos Díaz Vélez, Armelle Jardin-Blicq, Ruben Lopez-Coto, Yunior Pérez Araujo, Anna Lia Longinotti, Ahron S. Barber, Rishi Babu, Kelly Malone, Vincent Marandon, Alberto Carramiñana, Raquel Diaz Hernandez, Vardan Baghmanyan, Andrea Albert, Ke Fang, Juan Carlos Arteaga Velazquez, Meghan Tanner, Robert Ellsworth, Colas Rivière, Umberto Cotti, Sabrina Casanova, Jorge Cotzomi, Jose Luis García-Luna, and Jesús Martínez-Castro
Subjects: Physics, Dark matter, Astrophysics, Virgo Cluster, Galaxy
Published: 2021
Full Text: View/download PDF

24. The Ultra-High-Energy Source MGRO J1908+06

Author: Ian Herzog, Laura Olivera-Nieto, César Alvarez, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Tomás Capistrán, Anushka Udara Abeysekara, Dezhi Huang, Robert Ellsworth, J. Patrick Harding, Humberto Martínez Huerta, James Ryan, Brian Humensky, Lukas Nellen, Eduardo Moreno Barbosa, Umberto Cotti, Hao Zhou, Sara Coutiño de Leon, Segev BenZvi, Sabrina Casanova, Jesús Martínez-Castro, Jose Andres Garcia-Gonzalez, Fernando Garfias, Michelle Hui, Hawc, Ramiro Torres Escobedo, Wayne Robert Springer, Nicola Omodei, Jorge Cotzomi, Andrea Albert, Thomas Weisgarber, Joe Lundeen, Arturo Iriarte, Harm Schoorlemmer, Josefa Becerra Gonzalez, Gwenael Giacinti, Karen S. Caballero Mora, Juan Carlos Arteaga Velazquez, Edna Ruiz-Velasco, Meghan Tanner, Alison Peisker, David Kieda, Dirk Lennarz, Colas Rivière, Andrew James Smith, J. A. Goodman, Mora Durocher, Petra Hüntemeyer, Henrike Fleischhack, Ernesto Belmont-Moreno, Amid Nayerhoda, David Berley, Luis Villaseñor, José Serna-Franco, Mateo Fernandez Alonso, Jim Hinton, Hugo Alberto Ayala Solares, Sergio Hernández Cadena, Hannah Jhee, Roberto Noriega-Papaqui, Juan Carlos Díaz Vélez, Jose Luis García-Luna, Maria Magdalena González, Armelle Jardin-Blicq, Elijah Willox, Miguel Mostafa, Pedro Miranda-Romagnoli, Binita Hona, Ahron S. Barber, Cederik León de León, Xiaojie Wang, Nissim Illich Fraija, Eucario Gonzalo Pérez Pérez, Oscar Chaparro-Amaro, Samridha Kunwar, Eduardo de la Fuente, Israel Martinez Castellanos, Filiberto Hueyotl-Zahuantitla, J. T. Linnemann, Jason Fan, Rhiannon Turner, Guillermo García-Torales, Arun Babu Kollamparambil, Rishi Babu, Ke Fang, Pooja Surajbali, Andrés Sandoval, Chad Brisbois, Gus Sinnis, Fernando Ureña-Mena, Gaurang Yodh, José Roberto Angeles Camacho, Brenda Dingus, Gerd J. Kunde, Daniel Omar Avila Rojas, Kelly Malone, Alejandro Lara, Vincent Marandon, Alberto Carramiñana, Michael DuVernois, Raquel Diaz Hernandez, Vardan Baghmanyan, Juan de Dios Álvarez Romero, William H. Lee, Julie McEnery, Chang Dong Rho, Ruben Lopez-Coto, Francisco Salesa Greus, Arnulfo Zepeda, Brian Fick, Lorenzo Diaz, Joshua Wood, Diego Garcia Aguilar, Yunior Pérez Araujo, Anna Lia Longinotti, Jorge Luis Flores, Ibrahim Torres, Kristi Engel, Michael Newbold, Michael Schneider, Felix Werner, Ignacio Taboada, Vikas Joshi, Ruben Alfaro, Jason Lee, Daniel Rosa-Gonzalez, Humberto Ibarguen Salazar, Gilgamesh Luis-Raya, Kirsten Tollefson, John Matthews, Oscar Martinez, Mehr Nisa, Ian James Watson, Hazal Goksu, and Hermes Leon Vargas
Subjects: Physics, High energy, education.field_of_study, Spectral index, Observatory, Astrophysics::High Energy Astrophysical Phenomena, Population, Hadron, Spectral energy distribution, Astrophysics, education, Cherenkov radiation
Abstract: The TeV gamma-ray source MGRO J1908+06 is one of the highest-energy sources known, with observed emission by the High Altitude Water Cherenkov (HAWC) Observatory extending well past 100 TeV. The source exhibits both energy-dependent morphology and a spatially-dependent spectral index. The emission is likely to be dominantly leptonic, and associated with the radio-quiet PSR J1907+0602. However, one-population models do not describe the data well; a second particle population is needed to explain the shape of the spectral energy distribution at the highest energies. This component can be well-described by either leptonic or hadronic hypotheses. We discuss this feature and implications for detection by multi-wavelength and multi-messenger experiments.
Published: 2021
Full Text: View/download PDF

25. HAWC as a Ground-Based Space-Weather Observatory

Author: A. Zepeda, K. P. Arunbabu, S. Hernandez, J. A. Goodman, Ernesto Belmont-Moreno, R. W. Springer, O. Tibolla, E. Moreno, Juan Carlos Diaz-Velez, J. R. Angeles Camacho, Jose Andres Garcia-Gonzalez, Gerd Joachim Kunde, L. Nellen, D. Garcia, E. G. Pérez-Pérez, V. Baghmanyan, K. Malone, C. Alvarez, Karen S. Caballero-Mora, J. A. Morales-Soto, E. Tabachnick, Dezhi Huang, Catalina Espinoza, E. De la Fuente, D. Avila Rojas, Gilgamesh Luis-Raya, Jesús Martínez-Castro, Luis Villaseñor, Segev BenZvi, Pedro Miranda-Romagnoli, Alison Peisker, John Matthews, A. Sandoval, James M. Ryan, J. C. Arteaga-Velázquez, Umberto Cotti, Binita Hona, Michael Newbold, C. De León, P. Colin-Farias, Ibrahim Torres, Jorge Cotzomi, Nissim Illich Fraija, A. Galván-Gámez, R. Torres-Escobedo, Brenda Dingus, Daniel Rosa-Gonzalez, Fernando Garfias, Tomás Capistrán, H. León Vargas, M. J. F. Rosenberg, Y. Pérez Araujo, Maria Magdalena González, J. P. Harding, A. Nayerhoda, Chang Dong Rho, Hongyan Zhou, Filiberto Hueyotl-Zahuantitla, Simone Dichiara, Arturo Iriarte, Chad Brisbois, Michael DuVernois, Anna Lia Longinotti, Humberto Ibarguen Salazar, V. Joshi, K. Tollefson, R. Noriega-Papaqui, S. Coutiño de León, Alejandro Lara, and O. Martinez
Subjects: Physics, Photomultiplier, 010504 meteorology & atmospheric sciences, Physics::Instrumentation and Detectors, Detector, Gamma ray, Astronomy and Astrophysics, Cosmic ray, Space weather, 01 natural sciences, Space and Planetary Science, Observatory, 0103 physical sciences, 010303 astronomy & astrophysics, Energy (signal processing), Cherenkov radiation, 0105 earth and related environmental sciences, Remote sensing
Abstract: The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is located close to the equator (latitude $18^{\circ }$ N), at an altitude of 4100 m above sea level. HAWC has 295 water Cherenkov detectors (WCD), each containing four photomultiplier tubes (PMT). The main purpose of HAWC is the determination of the energy and arrival direction of very high energy gamma rays produced by energetic processes in the universe, HAWC also has a scaler system which counts the arrival of secondary particles to the detector. In this work we show that the scaler system of HAWC is an ideal instrument for solar modulation and space-weather studies due to its large area and high sensitivity. In order to prepare the scaler system for low energy heliospheric studies, we model and correct the efficiency variation of each PMT of the array, which result in a capability to measure variations $> 0.01\%$ with high accuracy. Using the singular value decomposition method, we correct the rate deviations of all PMTs of the array, due to changes in efficiency, gain and operational voltage. We isolate and remove the atmospheric modulations of the PMTs count rates measured by the TDC-scaler data acquisition system. In particular, the atmospheric pressure at the HAWC site exhibits an oscillating behavior with a period of ∼12 hours and we make use of this periodic property to estimate the pressure coefficients for the HAWC TDC-scaler system. These corrections performed on the TDC-scaler system make the HAWC TDC-scaler system an ideal instrument for solar modulation and space-weather studies. As examples of this capability, we present the preliminary analysis of the solar modulation of cosmic rays at three time scales observed by HAWC, with an unprecedented accuracy.
Published: 2021
Full Text: View/download PDF

26. HAWC Search for High-Mass Microquasars

Author: Ernesto Belmont-Moreno, Elijah Willox, J. A. Goodman, Dezhi Huang, Jorge Cotzomi, Mora Durocher, Petra Hüntemeyer, J. P. Harding, R. W. Springer, A. Carraminana, K. Malone, A. J. Smith, J. C. Arteaga-Velázquez, H. Zhou, Joe Lundeen, C. D. Rho, F. Salesa Greus, R. W. Ellsworth, C. De León, K. P. Arunbabu, A. L. Longinotti, David Kieda, B. Hona, Alison Peisker, L. Nellen, E. Moreno, Fernando Ureña-Mena, Umberto Cotti, R. Torres-Escobedo, C. Brisbois, Sabrina Casanova, R. Diaz Hernandez, Maria Magdalena González, S. Hernandez, Nissim Illich Fraija, Karen S. Caballero-Mora, Michael Newbold, Rhiannon Turner, Fernando Garfias, Michael DuVernois, Thomas Weisgarber, Catalina Espinoza, A. Sandoval, Jose Andres Garcia-Gonzalez, Filiberto Hueyotl-Zahuantitla, Jesús Martínez-Castro, Michael Schneider, H. A. Ayala Solares, Ke Fang, Y. J. Roh, Andrea Albert, T. Capistrán, O. Martinez, Ian James Watson, Miguel Mostafa, Gilgamesh Luis-Raya, V. Baghmanyan, V. Joshi, José Serna-Franco, Alejandro Lara, J. T. Linnemann, R. Noriega-Papaqui, William H. Lee, L. Olivera-Nieto, J. S. H. Lee, A. Galván-Gámez, Brenda Dingus, K. Tollefson, Ruben Alfaro, Pedro Miranda-Romagnoli, Daniel Rosa-Gonzalez, John Matthews, J. A. Morales-Soto, Luis Villaseñor, Kwok Lung Fan, H. León Vargas, A. Jardin-Blicq, Ibrahim Torres, M. U. Nisa, Juan Carlos Diaz-Velez, C. Alvarez, Nicola Omodei, Arturo Iriarte, Y. Pérez Araujo, A. Nayerhoda, Segev BenZvi, E. De la Fuente, D. Avila Rojas, and J. R. Angeles Camacho
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Space and Planetary Science, Astrophysics::High Energy Astrophysical Phenomena, High mass, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Microquasars with high-mass companion stars are promising very-high-energy (VHE; 0.1-100 TeV) gamma-ray emitters, but their behaviors above 10 TeV are poorly known. Using the High Altitude Water Cherenkov (HAWC) observatory, we search for excess gamma-ray emission coincident with the positions of known high-mass microquasars (HMMQs). No significant emission is observed for LS 5039, Cygnus X-1, Cygnus X-3, and SS 433 with 1,523 days of HAWC data. We set the most stringent limit above 10 TeV obtained to date on each individual source. Under the assumption that HMMQs produce gamma rays via a common mechanism, we have performed source-stacking searches, considering two different scenarios: I) gamma-ray luminosity is a fraction $\epsilon_\gamma$ of the microquasar jet luminosity, and II) very-high-energy gamma rays are produced by relativistic electrons up-scattering the radiation field of the companion star in a magnetic field $B$. We obtain $\epsilon_\gamma < 5.4\times 10^{-6}$ for scenario I, which tightly constrains models that suggest observable high-energy neutrino emission by HMMQs. In the case of scenario II, the non-detection of VHE gamma rays yields a strong magnetic field, which challenges synchrotron radiation as the dominant mechanism of the microquasar emission between 10 keV and 10 MeV., Comment: Accepted for publication in ApJL
Published: 2021

27. Evidence that Ultra-High-Energy Gamma Rays are a Universal Feature Near Powerful Pulsars

Author: R. Diaz Hernandez, Pedro Miranda-Romagnoli, J. A. Goodman, J. R. Angeles Camacho, Michael Newbold, Karen S. Caballero-Mora, Catalina Espinoza, John Matthews, Fernando Garfias, Jesús Martínez-Castro, H. A. Ayala Solares, Andrea Albert, Segev BenZvi, C. D. Rho, Thomas Weisgarber, Nicola Omodei, Dezhi Huang, Nissim Illich Fraija, E. Ruiz-Velasco, R. Torres-Escobedo, Ibrahim Torres, Arturo Iriarte, H. León Vargas, A. Carraminana, Joe Lundeen, R. W. Ellsworth, Meghan Tanner, C. De León, A. Sandoval, O. Martinez, K. Malone, J. C. Arteaga-Velázquez, Ernesto Belmont-Moreno, R. W. Springer, Michael Schneider, Alison Peisker, H. Zhou, E. G. Pérez-Pérez, K. P. Arunbabu, A. L. Longinotti, Kristi Engel, Harm Schoorlemmer, B. Hona, A. Jardin-Blicq, Elijah Willox, J. D. Álvarez, J. A. Morales-Soto, T. Capistrán, A. J. Smith, David Kieda, Humberto Ibarguen Salazar, Y. Pérez Araujo, J. P. Harding, Gwenael Giacinti, Gilgamesh Luis-Raya, L. Nellen, A. Nayerhoda, R. Noriega-Papaqui, Juan Carlos Diaz-Velez, S. Hernandez, Ruben Alfaro, William H. Lee, L. Olivera-Nieto, M. Fernández Alonso, C. Alvarez, Y. J. Roh, Miguel Mostafa, Daniel Rosa-Gonzalez, José Serna-Franco, Luis Villaseñor, Umberto Cotti, E. De la Fuente, Sabrina Casanova, D. Avila Rojas, V. Joshi, F. Salesa Greus, S. Coutiño de León, M. U. Nisa, Jorge Cotzomi, Alejandro Lara, J. T. Linnemann, Rhiannon Turner, Maria Magdalena González, Michael DuVernois, Kwok Lung Fan, Filiberto Hueyotl-Zahuantitla, J. S. H. Lee, E. Moreno, A. Galván-Gámez, Brenda Dingus, V. Marandon, K. Tollefson, C. Brisbois, V. Baghmanyan, Mora Durocher, Petra Hüntemeyer, Pooja Surajbali, Fernando Ureña-Mena, and Jose Andres Garcia-Gonzalez
Subjects: Astroparticle physics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), High energy, High-energy astronomy, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Pulsar, Space and Planetary Science, Feature (computer vision), Astrophysics - High Energy Astrophysical Phenomena
Abstract: The highest-energy known gamma-ray sources are all located within 0.5 degrees of extremely powerful pulsars. This raises the question of whether ultra-high-energy (UHE; $>$ 56 TeV) gamma-ray emission is a universal feature expected near pulsars with a high spin-down power. Using four years of data from the High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory, we present a joint-likelihood analysis of ten extremely powerful pulsars to search for UHE gamma-ray emission correlated with these locations. We report a significant detection ($>$ 3$��$), indicating that UHE gamma-ray emission is a generic feature of powerful pulsars. We discuss the emission mechanisms of the gamma rays and the implications of this result. The individual environment that each pulsar is found in appears to play a role in the amount of emission., accepted by ApJL
Published: 2021

28. Use of Machine Learning for gamma/hadron separation with HAWC

Author: Tomás Capistrán, Kwok Lung Fan, James T. Linnemann, Ibrahim Torres, Pablo Miguel Saz Parkinson, Philip L. H. Yu, Anushka Udara Abeysekara, Andrea Albert, Ruben Alfaro, César Alvarez, Juan de Dios Álvarez Romero, José Roberto Angeles Camacho, Juan Carlos Arteaga Velazquez, Arun Babu Kollamparambil, Daniel Omar Avila Rojas, Hugo Alberto Ayala Solares, Rishi Babu, Vardan Baghmanyan, Ahron S. Barber, Josefa Becerra Gonzalez, Ernesto Belmont-Moreno, Segev BenZvi, David Berley, Chad Brisbois, Karen S. Caballero Mora, Alberto Carramiñana, Sabrina Casanova, Oscar Chaparro-Amaro, Umberto Cotti, Jorge Cotzomi, Sara Coutiño de León, Eduardo de la Fuente, Cederik León de León, Lorenzo Diaz, Raquel Diaz Hernandez, Juan Carlos Díaz Vélez, Brenda Dingus, Mora Durocher, Michael DuVernois, Robert Ellsworth, Kristi Engel, María Catalina Espinoza Hernández, Ke Fang, Mateo Fernandez Alonso, Brian Fick, Henrike Fleischhack, Jorge Luis Flores, Nissim Illich Fraija, Diego Garcia Aguilar, Jose Andres Garcia-Gonzalez, Jose Luis García-Luna, Guillermo García-Torales, Fernando Garfias, Gwenael Giacinti, Hazal Goksu, Maria Magdalena González, Jordan A. Goodman, J. Patrick Harding, Sergio Hernández Cadena, Ian Herzog, Jim Hinton, Binita Hona, Dezhi Huang, Filiberto Hueyotl-Zahuantitla, Michelle Hui, Brian Humensky, Petra Hüntemeyer, Arturo Iriarte, Armelle Jardin-Blicq, Hannah Jhee, Vikas Joshi, David Kieda, Gerd J. Kunde, Samridha Kunwar, Alejandro Lara, Jason LEE, William H. Lee, Dirk Lennarz, Hermes Leon Vargas, Anna Lia Longinotti, Ruben Lopez-Coto, Gilgamesh Luis-Raya, Joe Lundeen, Kelly Malone, Vincent Marandon, Oscar M Martinez, Israel Martinez Castellanos, Humberto Martínez Huerta, Jesús Martínez-Castro, John Matthews, Julie McEnery, Pedro Miranda-Romagnoli, Jorge Antonio Morales Soto, Eduardo Moreno Barbosa, Miguel Mostafa, Amid Nayerhoda, Lukas Nellen, Michael Newbold, Mehr Un Nisa, Roberto Noriega-Papaqui, Laura Olivera-Nieto, Nicola Omodei, Alison Peisker, Yunior Pérez Araujo, Eucario Gonzalo Pérez Pérez, Chang Dong Rho, Colas Rivière, Daniel Rosa-Gonzalez, Edna Ruiz-Velasco, James Ryan, Humberto Ibarguen Salazar, Francisco Salesa Greus, Andrés Sandoval, Michael Schneider, Harm Schoorlemmer, José Serna-Franco, Gus Sinnis, Andrew James Smith, Wayne Robert Springer, Pooja Surajbali, Ignacio Taboada, Meghan Tanner, Kirsten Tollefson, Ramiro Torres Escobedo, Rhiannon M. Turner, Fernando Josue Urena Mena, Luis Villaseñor, Xiaojie Wang, Ian James Watson, Thomas Weisgarber, Felix Werner, Elijah Job Willox, Joshua Wood, Gaurang Yodh, Arnulfo Zepeda, and Hao Zhou
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Artificial neural network, High-energy astronomy, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Separation (aeronautics), Hadron, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Machine learning, computer.software_genre, Crab Nebula, Observatory, Alternating decision tree, Artificial intelligence, business, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, computer, Instrumentation and Methods for Astrophysics (astro-ph.IM), Cherenkov radiation
Abstract: Background showers triggered by hadrons represent over 99.9% of all particles arriving at ground-based gamma-ray observatories. An important stage in the data analysis of these observatories, therefore, is the removal of hadron-triggered showers. Currently, the High-Altitude Water Cherenkov (HAWC) gamma-ray observatory employs an algorithm based on a single cut in two variables, unlike other ground-based gamma-ray observatories (e.g. H.E.S.S., VERITAS), which employ a large number of variables to separate the primary particles. In this work, we explore machine learning techniques (Boosted Decision Trees and Neural Networks) to identify the primary particles detected by HAWC. Our new gamma/hadron separation techniques were tested on data from the Crab nebula, the standard reference in Very High Energy astronomy, showing an improvement compared to the standard HAWC background rejection method., Comment: Presented at the 37th International Cosmic Ray Conference (ICRC2021), Berlin, Germany - Online
Published: 2021
Full Text: View/download PDF

29. Probing the Sea of Cosmic Rays by Measuring Gamma-Ray Emission from Passive Giant Molecular Clouds with HAWC

Author: Segev BenZvi, C. Alvarez, S. Coutiño de León, A. Sandoval, Alejandro Lara, Pooja Surajbali, S. Hernandez, E. De la Fuente, Fernando Ureña-Mena, D. Avila Rojas, R. Diaz Hernandez, Andrea Albert, Michael Schneider, K. Malone, Fernando Garfias, H. Zhou, E. Ruiz-Velasco, C. Brisbois, K. P. Arunbabu, Mora Durocher, Petra Hüntemeyer, A. L. Longinotti, O. Martinez, J. S. H. Lee, D. Garcia, H. León Vargas, J. A. Morales-Soto, A. Galván-Gámez, Nicola Omodei, J. A. Goodman, Meghan Tanner, Arturo Iriarte, Brenda Dingus, Y. Pérez Araujo, J. C. Arteaga-Velázquez, Michael Newbold, Alison Peisker, A. Nayerhoda, Juan Carlos Diaz-Velez, Luis Villaseñor, Jose Andres Garcia-Gonzalez, J. R. Angeles Camacho, Ernesto Belmont-Moreno, E. Moreno, Miguel Mostafa, B. Hona, Kwok Lung Fan, Umberto Cotti, K. Tollefson, Kristi Engel, Nissim Illich Fraija, J. P. Harding, T. Weisgarber, Maria Magdalena González, V. Joshi, Sabrina Casanova, M. U. Nisa, J. A. Matthews, Karen S. Caballero-Mora, Ibrahim Torres, V. Baghmanyan, Elijah Willox, Jorge Cotzomi, Catalina Espinoza, José Serna-Franco, Gilgamesh Luis-Raya, Filiberto Hueyotl-Zahuantitla, Jesús Martínez-Castro, H. A. Ayala Solares, Ruben Alfaro, C. D. Rho, R. Noriega-Papaqui, Dezhi Huang, Pedro Miranda-Romagnoli, J. T. Linnemann, William H. Lee, Daniel Rosa-Gonzalez, T. Capistrán, M. Fernández Alonso, R. Torres-Escobedo, A. J. Smith, R. W. Springer, L. Nellen, E. G. Pérez-Pérez, David Kieda, C. De León, F. Salesa Greus, Rhiannon Turner, Michael DuVernois, A. Carraminana, Joe Lundeen, and R. W. Ellsworth
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), High-energy astronomy, Molecular cloud, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, FOS: Physical sciences, Astronomy and Astrophysics, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Space and Planetary Science, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::Galaxy Astrophysics
Abstract: The study of high-energy gamma rays from passive Giant Molecular Clouds (GMCs) in our Galaxy is an indirect way to characterize and probe the paradigm of the "sea" of cosmic rays in distant parts of the Galaxy. By using data from the High Altitude Water Cherenkov (HAWC) observatory, we measure the gamma-ray flux above 1 TeV of a set of these clouds to test the paradigm. We selected high-galactic latitude clouds that are in HAWC's field-of-view and which are within 1~kpc distance from the Sun. We find no significant excess emission in the cloud regions, nor when we perform a stacked log-likelihood analysis of GMCs. Using a Bayesian approach, we calculate 95\% credible intervals upper limits of the gamma-ray flux and estimate limits on the cosmic-ray energy density of these regions. These are the first limits to constrain gamma-ray emission in the multi-TeV energy range ($>$1 TeV) using passive high-galactic latitude GMCs. Assuming that the main gamma-ray production mechanism is due to proton-proton interaction, the upper limits are consistent with a cosmic-ray flux and energy density similar to that measured at Earth., 6 figures, 6 tables
Published: 2021
Full Text: View/download PDF

30. Spectrum and morphology of the very-high-energy source HAWC J2019+368

Author: R. W. Springer, C. D. Rho, E. G. Pérez-Pérez, Alison Peisker, A. J. Smith, J. A. Morales-Soto, E. Moreno, Sabrina Casanova, V. Joshi, Dezhi Huang, Rhiannon Turner, Michael DuVernois, L. Nellen, A. Carraminana, T. Capistrán, Joe Lundeen, J. P. Harding, Gwenael Giacinti, Jorge Cotzomi, J. C. Arteaga-Velázquez, Karen S. Caballero-Mora, Nicola Omodei, Jose Andres Garcia-Gonzalez, S. Coutiño de León, T. Weisgarber, V. Baghmanyan, Catalina Espinoza, J. A. Goodman, D. Garcia, Nissim Illich Fraija, H. Zhou, A. Jardin-Blicq, Jesús Martínez-Castro, H. A. Ayala Solares, K. P. Arunbabu, A. L. Longinotti, A. Sandoval, Ernesto Belmont-Moreno, Humberto Ibarguen Salazar, O. Martinez, Jim Hinton, Andrea Albert, Michael Schneider, P. Huentemeyer, Miguel Mostafa, C. Brisbois, Harm Schoorlemmer, M. U. Nisa, R. Noriega-Papaqui, Binita Hona, Elijah Willox, Pooja Surajbali, Brenda Dingus, William H. Lee, L. Olivera-Nieto, Michael Newbold, José Serna-Franco, R. Diaz Hernandez, Fernando Ureña-Mena, Pedro Miranda-Romagnoli, R. López-Coto, K. Tollefson, Y. Pérez Araujo, E. Ruiz-Velasco, A. Nayerhoda, J. T. Linnemann, F. Salesa Greus, Ibrahim Torres, Mora Durocher, H. León Vargas, C. Alvarez, Maria Magdalena González, E. De la Fuente, C. De León, D. Avila Rojas, Filiberto Hueyotl-Zahuantitla, Gilgamesh Luis-Raya, K. Malone, John Matthews, Ruben Alfaro, Daniel Rosa-Gonzalez, and Kristi Engel
Subjects: Energy dependent, Physics, High energy, Nebula, 010504 meteorology & atmospheric sciences, media_common.quotation_subject, Astronomy and Astrophysics, Astrophysics, 01 natural sciences, Pulsar wind nebula, Pulsar, Space and Planetary Science, Sky, 0103 physical sciences, Supernova remnant, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, media_common
Abstract: The MGRO J2019+37 region is one of the brightest sources in the sky at TeV energies. It was detected in the second HAWC catalog as 2HWC J2019+367 and here we present a detailed study of this region using data from HAWC. This analysis resolves the region into two sources: HAWC J2019+368 and HAWC J2016+371. We associate HAWC J2016+371 with the evolved supernova remnant CTB 87, although its low significance in this analysis prevents a detailed study at this time. An investigation of the morphology (including possible energy-dependent morphology) and spectrum for HAWC J2019+368 is the focus of this work. We associate HAWC J2019+368 with PSR J2021+3651 and its X-ray pulsar wind nebula, the Dragonfly nebula. Modeling the spectrum measured by HAWC and Suzaku reveals a ∼7 kyr pulsar and nebula system producing the observed emission at X-ray and γ-ray energies.
Published: 2021

31. Standardized Formats for Gamma-Ray Analysis Applied to HAWC Observatory Data

Author: Eucario Gonzalo Pérez Pérez, Rishi Babu, Kelly Malone, Ahron S. Barber, Eduardo Moreno Barbosa, Vincent Marandon, Alberto Carramiñana, Ignacio Taboada, Raquel Diaz Hernandez, Vardan Baghmanyan, Ruben Alfaro, Edna Ruiz-Velasco, Guillermo García-Torales, Arun Babu Kollamparambil, Sara Coutiño de Leon, Wayne Robert Springer, Miguel Mostafa, Vikas Joshi, Jason Lee, Brenda Dingus, Daniel Omar Avila Rojas, Cederik León de León, Karen S. Caballero Mora, Ruben Lopez-Coto, Daniel Rosa-Gonzalez, Ke Fang, Hugo Alberto Ayala Solares, Michael Schneider, Francisco Salesa Greus, Felix Werner, José Serna-Franco, Yunior Pérez Araujo, Anna Lia Longinotti, Joshua Wood, Roberto Noriega-Papaqui, Axel Donath, Jorge Cotzomi, Binita Hona, César Alvarez, Gerd J. Kunde, Samridha Kunwar, Kristi Engel, Israel Martinez Castellanos, Josefa Becerra Gonzalez, Harm Schoorlemmer, Alison Peisker, Andrew James Smith, Amid Nayerhoda, J. T. Linnemann, Luis Villaseñor, Henrike Fleischhack, James Ryan, Diego Garcia Aguilar, Jorge Luis Flores, Ibrahim Torres, Jesús Martínez-Castro, Hazal Goksu, Oscar Chaparro-Amaro, Lukas Nellen, Segev BenZvi, J. A. Goodman, Gwenael Giacinti, Juan Carlos Díaz Vélez, Gilgamesh Luis-Raya, Hao Zhou, J. Patrick Harding, Jose Luis García-Luna, Andrea Albert, Armelle Jardin-Blicq, Humberto Martínez Huerta, Kirsten Tollefson, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Robert Ellsworth, David Berley, Ernesto Belmont-Moreno, Brian Humensky, Tomás Capistrán, John Matthews, Fernando Garfias, Jim Hinton, Juan Carlos Arteaga Velazquez, Rhiannon Turner, Sergio Hernández Cadena, Xiaojie Wang, Pedro Miranda-Romagnoli, Umberto Cotti, Ramiro Torres Escobedo, Meghan Tanner, Chad Brisbois, Thomas Weisgarber, Arnulfo Zepeda, Nicola Omodei, Sabrina Casanova, Colas Rivière, Oscar Martinez, Anushka Udara Abeysekara, Brian Fick, José Roberto Angeles Camacho, Hermes Leon Vargas, Arturo Iriarte, Laura Olivera-Nieto, Lorenzo Diaz, Elijah Willox, Alejandro Lara, Michael Newbold, Joe Lundeen, Dezhi Huang, Michael DuVernois, Ian Herzog, David Kieda, Hannah Jhee, Nissim Illich Fraija, Maria Magdalena González, Jason Fan, Eduardo de la Fuente, Filiberto Hueyotl-Zahuantitla, Dirk Lennarz, Michelle Hui, Pooja Surajbali, Andrés Sandoval, Gus Sinnis, Fernando Ureña-Mena, Gaurang Yodh, Mora Durocher, Petra Hüntemeyer, Mateo Fernandez Alonso, Jose Andres Garcia-Gonzalez, Juan de Dios Álvarez Romero, William H. Lee, Julie McEnery, Chang Dong Rho, Humberto Ibarguen Salazar, Mehr Nisa, and Ian James Watson
Subjects: HAWC - Abteilung Hinton, High Energy Astrophysical Phenomena (astro-ph.HE), Event (computing), Computer science, FOS: Physical sciences, Proprietary software, Cherenkov Telescope Array, Data sharing, Observatory, Systems engineering, Analysis tools, Common Data Format, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics (astro-ph.IM), Cherenkov radiation
Abstract: A wide range of data formats and proprietary software have traditionally been used in gamma-ray astronomy, usually developed for a single specific mission or experiment. However, in recent years there has been an increasing effort towards making astronomical data open and easily accessible. Within the gamma-ray community this has translated to the creation of a common data format across different gamma-ray observatories: the "gamma-astro-data-format" (GADF). Based on a similar premise, open-source analysis packages, such as Gammapy, are being developed and aim to provide a single, robust tool which suits the needs of many experiments at once. In this contribution we show that data from the High-Altitude Water Cherenkov (HAWC) observatory can be made compatible with the GADF and present the first GADF-based production of event lists and instrument response functions for a ground-based wide-field instrument. We use these data products to reproduce with excellent agreement the published HAWC Crab spectrum using Gammapy. Having a common data format and analysis tools facilitates joint analysis between different experiments and effective data sharing. This will be especially important for next-generation instruments, such as the proposed Southern Wide-field Gamma-ray Observatory (SWGO) and the planned Cherenkov Telescope Array (CTA)., Comment: Submitted at the 37th International Cosmic Ray conference (ICRC 2021) under the reference PoS(ICRC2021)727
Published: 2021
Full Text: View/download PDF

32. A survey of active galaxies at TeV photon energies with the HAWC gamma-ray observatory

Author: Andrea Albert, Fernando Garfias, Kristi Engel, K. Tollefson, A. Zepeda, E. Ruiz-Velasco, H. León Vargas, Segev BenZvi, Binita Hona, H. Zhou, K. P. Arunbabu, J. A. Morales-Soto, C. Brisbois, Karen S. Caballero-Mora, Jose Andres Garcia-Gonzalez, Ernesto Belmont-Moreno, Pedro Miranda-Romagnoli, Catalina Espinoza, S. Coutiño de León, J. R. Angeles Camacho, Jesús Martínez-Castro, F. Salesa Greus, H. A. Ayala Solares, A. Carraminana, Luis Villaseñor, Daniel Rosa-Gonzalez, E. Moreno, Alejandro Lara, R. W. Springer, Joe Lundeen, C. De León, Alison Peisker, Kwok Lung Fan, E. G. Pérez-Pérez, O. Martinez, J. C. Arteaga-Velázquez, Elijah Willox, Gerd Joachim Kunde, Henrike Fleischhack, Fernando Ureña-Mena, John Matthews, Harm Schoorlemmer, Ibrahim Torres, R. Torres-Escobedo, Gilgamesh Luis-Raya, David Kieda, V. Baghmanyan, R. Noriega-Papaqui, William H. Lee, L. Olivera-Nieto, I. Martinez-Castellanos, C. D. Rho, Mora Durocher, Petra Hüntemeyer, A. Sandoval, A. J. Smith, M. U. Nisa, K. Malone, Michael Schneider, Jorge Cotzomi, S. Hernandez, J. A. Goodman, Michael DuVernois, A. Jardin-Blicq, Nissim Illich Fraija, Dezhi Huang, D. Garcia, J. P. Harding, T. Weisgarber, A. Nayerhoda, Arturo Iriarte, Michael Newbold, Juan Carlos Diaz-Velez, J. T. Linnemann, Tomás Capistrán, C. Alvarez, E. De la Fuente, D. Avila Rojas, A. Galván-Gámez, Brenda Dingus, Anna Lia Longinotti, Humberto Ibarguen Salazar, Umberto Cotti, Maria Magdalena González, Miguel Mostafa, Sabrina Casanova, M. Fernández Alonso, V. Joshi, Filiberto Hueyotl-Zahuantitla, and L. Nellen
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Active galactic nucleus, Radio galaxy, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Extragalactic background light, Space and Planetary Science, Observatory, Sky, Blazar, Astrophysics - High Energy Astrophysical Phenomena, Cherenkov radiation, media_common
Abstract: The High Altitude Water Cherenkov Gamma-Ray Observatory (HAWC) continuously detects TeV photons and particles within its large field-of-view, accumulating every day a deeper exposure of two thirds of the sky. We analyzed 1523~days of HAWC live data acquired over four and a half years, in a follow-up analysis of {138} nearby ($z, Comment: The HAWC survey of Fermi 3FHL AGNs: 30 pages, 13 figures. Submitted to the Astrophysical Journal
Published: 2020

33. 3HWC: The Third HAWC Catalog of Very-High-Energy Gamma-ray Sources

Author: Michael Newbold, O. Martinez, Segev BenZvi, F. Serna, Pooja Surajbali, Gus Sinnis, Fernando Garfias, S. Hernandez, A. Zepeda, Fernando Ureña-Mena, E. Ruiz-Velasco, H. Zhou, Y. Pérez Araujo, Nicola Omodei, Arturo Iriarte, A. Nayerhoda, L. Diaz-Cruz, K. P. Arunbabu, A. L. Longinotti, R. Diaz Hernandez, Mora Durocher, Petra Hüntemeyer, A. Sandoval, H. León Vargas, J. A. Morales-Soto, Michael Schneider, A. Jardin-Blicq, J. C. Arteaga-Velázquez, Harm Schoorlemmer, B. Hona, Gilgamesh Luis-Raya, K. Malone, T. N. Ukwatta, R. Noriega-Papaqui, Andrea Albert, Tomás Capistrán, Kwok Lung Fan, Humberto Ibarguen Salazar, William H. Lee, L. Olivera-Nieto, V. Baghmanyan, Alison Peisker, C. Brisbois, Henrike Fleischhack, A. Carraminana, Jose Andres Garcia-Gonzalez, C. Rivière, Mehr Nisa, Miguel Mostafa, D. Garcia, Joe Lundeen, Juan Carlos Diaz-Velez, John Matthews, R. López-Coto, J. P. Harding, R. W. Ellsworth, S. Coutiño de León, T. Weisgarber, V. Joshi, J. R. Angeles Camacho, Alejandro Lara, A. J. Smith, Ibrahim Torres, L. Nellen, J. D. Álvarez, Ke Fang, Ruben Alfaro, K. Tollefson, F. Salesa Greus, Daniel Rosa-Gonzalez, M. Fernández Alonso, C. Alvarez, Kristi Engel, Michael DuVernois, C. De León, E. De la Fuente, J. T. Linnemann, F. Werner, D. Avila Rojas, J. A. Goodman, Pedro Miranda-Romagnoli, Dezhi Huang, A. Galván-Gámez, Brenda Dingus, V. Marandon, Karen S. Caballero-Mora, Catalina Espinoza, Jesús Martínez-Castro, H. A. Ayala Solares, Gwenael Giacinti, I. Martinez-Castellanos, R. Torres-Escobedo, E. Moreno, R. W. Springer, E. G. Pérez-Pérez, David Kieda, Umberto Cotti, Sabrina Casanova, Ernesto Belmont-Moreno, Nissim Illich Fraija, Jim Hinton, Maria Magdalena González, Elijah Willox, Z. Ren, Filiberto Hueyotl-Zahuantitla, and C. D. Rho
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), High energy, High-energy astronomy, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Gamma-ray astronomy, Astrophysics::Cosmology and Extragalactic Astrophysics, Pulsar, Space and Planetary Science, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics::Galaxy Astrophysics
Abstract: We present a new catalog of TeV gamma-ray sources using 1523 days of data from the High Altitude Water Cherenkov (HAWC) observatory. The catalog represents the most sensitive survey of the Northern gamma-ray sky at energies above several TeV, with three times the exposure compared to the previous HAWC catalog, 2HWC. We report 65 sources detected at $\geq$ 5 sigma significance, along with the positions and spectral fits for each source. The catalog contains eight sources that have no counterpart in the 2HWC catalog, but are within $1^\circ$ of previously detected TeV emitters, and twenty sources that are more than $1^\circ$ away from any previously detected TeV source. Of these twenty new sources, fourteen have a potential counterpart in the fourth \textit{Fermi} Large Area Telescope catalog of gamma-ray sources. We also explore potential associations of 3HWC sources with pulsars in the ATNF pulsar catalog and supernova remnants in the Galactic supernova remnant catalog., 20 pages, 11 figures. Matches the version published in The Astrophysical Journal. See accompanying data release at https://data.hawc-observatory.org/datasets/3hwc-survey/index.php
Published: 2020

34. HAWC and Fermi-LAT Detection of Extended Emission from the Unidentified Source 2HWC J2006+341

Author: E. Moreno, Nissim Illich Fraija, Nicola Omodei, Pedro Miranda-Romagnoli, Alison Peisker, Arturo Iriarte, L. Nellen, Henrike Fleischhack, Fernando Ureña-Mena, C. Alvarez, Andrea Albert, F. Salesa Greus, Mora Durocher, Petra Hüntemeyer, A. Zepeda, D. Garcia, R. W. Springer, Mehr Nisa, C. Brisbois, H. Zhou, Miguel Mostafa, E. G. Pérez-Pérez, E. De la Fuente, John Matthews, D. Avila Rojas, K. P. Arunbabu, Michael DuVernois, Ibrahim Torres, V. Joshi, A. Galván-Gámez, C. De León, Jose Andres Garcia-Gonzalez, R. Torres-Escobedo, R. Diaz Hernandez, K. Malone, Miguel Araya, A. Carraminana, V. Baghmanyan, Brenda Dingus, Karen S. Caballero-Mora, Catalina Espinoza, R. López-Coto, Anna Lia Longinotti, Jesús Martínez-Castro, Joe Lundeen, H. A. Ayala Solares, K. Tollefson, O. Martinez, A. Jardin-Blicq, Ruben Alfaro, Gilgamesh Luis-Raya, Juan Carlos Diaz-Velez, J. R. Angeles Camacho, Umberto Cotti, Daniel Rosa-Gonzalez, Sabrina Casanova, R. Noriega-Papaqui, J. T. Linnemann, Dezhi Huang, J. C. Arteaga-Velázquez, B. Hona, J. A. Goodman, Fernando Garfias, Maria Magdalena González, Ernesto Belmont-Moreno, Filiberto Hueyotl-Zahuantitla, H. León Vargas, A. Sandoval, Michael Schneider, Elijah Willox, J. P. Harding, C. D. Rho, T. Weisgarber, and Luis Villaseñor
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, 01 natural sciences, Interstellar medium, Space and Planetary Science, 0103 physical sciences, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Fermi Gamma-ray Space Telescope
Abstract: The discovery of the TeV point source 2HWC J2006+341 was reported in the second HAWC gamma-ray catalog. We present a follow-up study of this source here. The TeV emission is best described by an extended source with a soft spectrum. At GeV energies, an extended source is significantly detected in Fermi-LAT data. The matching locations, sizes and spectra suggest that both gamma-ray detections correspond to the same source. Different scenarios for the origin of the emission are considered and we rule out an association to the pulsar PSR J2004+3429 due to extreme energetics required, if located at a distance of 10.8 kpc., Comment: 12 pages, 2 figures. To appear in ApJL
Published: 2020
Full Text: View/download PDF

35. Data acquisition architecture and online processing system for the HAWC gamma-ray observatory

Author: Jorge Cotzomi, P. Karn, Fernando Garfias, M. Longo Proper, Anushka Udara Abeysekara, Petra Hüntemeyer, Thomas Weisgarber, J. P. Harding, T. Yapici, F. Salesa Greus, Alberto Carramiñana, A. Imran, Ruben Alfaro, H. León Vargas, Daniel Rosa-Gonzalez, T. N. Ukwatta, Varlen Grabski, R. Arceo, Pedro Miranda-Romagnoli, M. Bonilla Rosales, Michael Newbold, A. J. Smith, O. Martinez, Michael DuVernois, Nissim Illich Fraija, James E. Braun, E. De la Fuente, R. Noriega-Papaqui, R. A. Caballero-Lopez, J. C. Arteaga-Velázquez, Gerd Joachim Kunde, D. Berley, N. Bautista-Elivar, James M. Ryan, A. Sandoval, G. Sinnis, J. Becerra González, L. Nellen, William H. Lee, J. Pretz, S. S. Marinelli, E. Mendoza Torres, James W. Wood, Kelly Malone, C. M. Hui, Hao Zhou, C. De León, Umberto Cotti, H. Martínez-Huerta, Julie McEnery, Michael Schneider, I. G. Wisher, Edna Ruiz-Velasco, R. W. Springer, E. G. Pérez-Pérez, Tyce DeYoung, P. A. Toale, I. Taboada, K. Sparks Woodle, C. Alvarez, Rodrigo Pelayo, E. C. Linares, J. A.J. Matthews, A. Marinelli, A. Zepeda, David Kieda, S. Westerhoff, F. E. Sanchez, M. Castillo, Humberto Ibarguen Salazar, Juan Carlos Diaz-Velez, P. W. Younk, D. W. Fiorino, Dirk Lennarz, E. Moreno, J. D. Álvarez, Maria Magdalena González, Arturo Iriarte, T. Oceguera-Becerra, R. J. Lauer, A. Galindo, Karen S. Caballero-Mora, Jesús Martínez-Castro, H. A. Ayala Solares, K. Tollefson, Alejandro Lara, Z. Hampel-Arias, R. Diaz Hernandez, Ibrahim Torres, D. Zaborov, J. T. Linnemann, G. B. Yodh, A. S. Barber, R. W. Ellsworth, S. Silich, B. M. Baughman, C. Rivière, L. Villaseñor, J. A. Goodman, Ernesto Belmont-Moreno, Miguel Mostafa, Segev BenZvi, J. Diaz-Cruz, M. Gussert, B. Patricelli, Brenda Dingus, and R. Luna-Garcia
Subjects: Physics, Nuclear and High Energy Physics, business.industry, Gigabit Ethernet, Electrical engineering, FOS: Physical sciences, Dead time, 01 natural sciences, Data processing system, Time-to-digital converter, Air shower, Data acquisition, Observatory, 0103 physical sciences, Custom software, Astrophysics - Instrumentation and Methods for Astrophysics, 010306 general physics, business, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Instrumentation, Computer hardware
Abstract: The High Altitude Water Cherenkov observatory (HAWC) is an air shower array devised for TeV gamma-ray astronomy. HAWC is located at an altitude of 4100 m a.s.l. in Sierra Negra, Mexico. HAWC consists of 300 Water Cherenkov Detectors, each instrumented with 4 photomultiplier tubes (PMTs). HAWC re-uses the Front-End Boards from the Milagro experiment to receive the PMT signals. These boards are used in combination with Time to Digital Converters (TDCs) to record the time and the amount of light in each PMT hit (light flash). A set of VME TDC modules (128 channels each) is operated in a continuous (dead time free) mode. The TDCs are read out via the VME bus by Single-Board Computers (SBCs), which in turn are connected to a gigabit Ethernet network. The complete system produces ~ 500 MB/s of raw data. A high-throughput data processing system has been designed and built to enable real-time data analysis. The system relies on off-the-shelf hardware components, an open-source software technology for data transfers (ZeroMQ) and a custom software framework for data analysis (AERIE). Multiple trigger and reconstruction algorithms can be combined and run on blocks of data in a parallel fashion, producing a set of output data streams which can be analyzed in real time with minimal latency (< 5 s). This paper provides an overview of the hardware set-up and an in-depth description of the software design, covering both the TDC data acquisition system and the real-time data processing system. The performance of these systems is also discussed., 14 pages, 3 figures, submitted to Nucl. Instrum. Meth. A
Published: 2018
Full Text: View/download PDF

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

Author: A. Jardin-Blicq, J. A. Morales-Soto, Juan Carlos Diaz-Velez, A. Sandoval, Mora Durocher, D. Garcia, C. Alvarez, E. De la Fuente, F. Werner, D. Avila Rojas, F. Serna, J. R. Angeles Camacho, Kwok Lung Fan, Petra Hüntemeyer, J. C. Arteaga-Velázquez, Michael Schneider, R. Diaz Hernandez, S. Hernandez, Nicola Omodei, Arturo Iriarte, K. Tollefson, B. Hona, Gilgamesh Luis-Raya, C. De León, V. Baghmanyan, E. Moreno, C. Brisbois, Umberto Cotti, Maria Magdalena González, Kristi Engel, Nissim Illich Fraija, Sabrina Casanova, Fernando Garfias, A. Zepeda, Harm Schoorlemmer, Pooja Surajbali, J. A. Matthews, E. Ruiz-Velasco, Humberto Ibarguen Salazar, H. Zhou, Fernando Ureña-Mena, Alison Peisker, Z. Ren, Ibrahim Torres, R. Noriega-Papaqui, Filiberto Hueyotl-Zahuantitla, K. P. Arunbabu, Ruben Alfaro, A. L. Longinotti, H. León Vargas, J. P. Harding, Henrike Fleischhack, William H. Lee, L. Olivera-Nieto, O. Martinez, T. Weisgarber, Daniel Rosa-Gonzalez, Miguel Mostafa, Michael DuVernois, Anushka Udara Abeysekara, Roger Blandford, S. Coutiño de León, R. W. Springer, Jose Andres Garcia-Gonzalez, Michael Newbold, Alejandro Lara, K. Malone, E. G. Pérez-Pérez, V. Joshi, J. D. Álvarez, E. Belmont-Moreno, A. J. Smith, Ke Fang, C. D. Rho, T. Capistrán, David Kieda, L. Nellen, F. Salesa Greus, A. Carraminana, Joe Lundeen, R. W. Ellsworth, Jim Hinton, Elijah Willox, J. A. Goodman, Dezhi Huang, Pedro Miranda-Romagnoli, M. U. Nisa, A. Galván-Gámez, Brenda Dingus, J. T. Linnemann, Y. Pérez Araujo, A. Nayerhoda, Segev BenZvi, Gwenael Giacinti, I. Martinez-Castellanos, Andrea Albert, R. Torres-Escobedo, Karen S. Caballero-Mora, Catalina Espinoza, Jesús Martínez-Castro, and H. A. Ayala Solares
Subjects: Physics, Acceleration, Astronomy and Astrophysics, Astrophysics, Ultra-high-energy cosmic ray
Published: 2021
Full Text: View/download PDF

37. Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC

Author: J. C. Arteaga-Velázquez, Karen S. Caballero-Mora, S. Hernandez, A. Carraminana, Maria Magdalena González, Z. Ren, Filiberto Hueyotl-Zahuantitla, Dezhi Huang, Catalina Espinoza, J. Pretz, Joe Lundeen, Miguel Mostafa, Gilgamesh Luis-Raya, John Matthews, Jesús Martínez-Castro, R. W. Ellsworth, H. A. Ayala Solares, J. A. Morales-Soto, Tomás Capistrán, S. S. Marinelli, C. Brisbois, Haocheng Zhang, V. Joshi, Luis Villaseñor, Ruben Alfaro, C. Rivière, R. W. Springer, Ibrahim Torres, Anushka Udara Abeysekara, Fernando Garfias, Michael Newbold, Daniel Rosa-Gonzalez, E. G. Pérez-Pérez, A. Nayerhoda, Thomas Weisgarber, A. Galván-Gámez, S. Coutiño de León, E. Ruiz-Velasco, S. Kaufmann, Hao Zhou, Segev BenZvi, J. A. Goodman, Alejandro Lara, Chang Dong Rho, Alison Peisker, Pedro Miranda-Romagnoli, H. León Vargas, E. Moreno, Kristi Engel, Umberto Cotti, Ernesto Belmont-Moreno, K. P. Arunbabu, David Kieda, Jim Hinton, J C Díaz-Vélez, Brenda Dingus, R. López-Coto, Andrea Albert, Henrike Fleischhack, Sabrina Casanova, A. Sandoval, Jorge Cotzomi, R. Torres-Escobedo, Arturo Iriarte, Anna Lia Longinotti, Kelly Malone, Meghan Tanner, Michael Schneider, Harm Schoorlemmer, E. Tabachnick, Nissim Illich Fraija, R. Noriega-Papaqui, M. U. Nisa, O. Tibolla, J. T. Linnemann, William H. Lee, D. Garcia, J. P. Harding, Binita Hona, O. Martinez, I. Martinez-Castellanos, K. Tollefson, Pooja Surajbali, Gus Sinnis, J. Wood, J. R. Angeles Camacho, T. Yapici, H. Martínez-Huerta, Jose Andres Garcia-Gonzalez, Petra Hüntemeyer, E. De la Fuente, D. Avila Rojas, A. J. Smith, L. Nellen, V. Baghmanyan, C. De León, Armelle Jardin-Blicq, Michael DuVernois, F. Salesa Greus, M. J. F. Rosenberg, Simone Dichiara, and HAWC Collaboration
Subjects: Physics, HAWC - Abteilung Hinton, High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, General Physics and Astronomy, Flux, Astronomy, FOS: Physical sciences, ASTROFÍSICA, Effects of high altitude on humans, 01 natural sciences, Spectral line, Observatory, 0103 physical sciences, 010306 general physics, Astrophysics - High Energy Astrophysical Phenomena, Cherenkov radiation
Abstract: We present the first catalog of gamma-ray sources emitting above 56 and 100 TeV with data from the High Altitude Water Cherenkov (HAWC) Observatory, a wide field-of-view observatory capable of detecting gamma rays up to a few hundred TeV. Nine sources are observed above 56 TeV, all of which are likely Galactic in origin. Three sources continue emitting past 100 TeV, making this the highest-energy gamma-ray source catalog to date. We report the integral flux of each of these objects. We also report spectra for three highest-energy sources and discuss the possibility that they are PeVatrons., Accepted by Physical Review Letters
Published: 2019

38. Constraints on Lorentz invariance violation from HAWC observations of gamma rays above 100 TeV

Author: Maria Magdalena González, Filiberto Hueyotl-Zahuantitla, J. A. Morales-Soto, Gilgamesh Luis-Raya, C. De León, O. Tibolla, G. B. Yodh, Chang Dong Rho, Michael Newbold, H. Martínez-Huerta, Alison Peisker, Pooja Surajbali, Anna Lia Longinotti, Gus Sinnis, V. Baghmanyan, Ibrahim Torres, A. Nayerhoda, A. Sandoval, K. Tollefson, J. R. Angeles Camacho, A. Zepeda, A. J. Smith, Hao Zhou, Henrike Fleischhack, F. Salesa Greus, E. Moreno, Ernesto Belmont-Moreno, A. Carraminana, M. J. F. Rosenberg, Michael Schneider, Joe Lundeen, L. Nellen, S. Hernandez, Humberto Ibarguen Salazar, K. P. Arunbabu, R. López-Coto, Petra Hüntemeyer, Binita Hona, Nicola Omodei, S. Coutiño de León, R. W. Ellsworth, Chad Brisbois, Michael DuVernois, Arturo Iriarte, D. Garcia, Kristi Engel, Alejandro Lara, Andrea Albert, C. Alvarez, K. Malone, R. Torres-Escobedo, M. U. Nisa, V. Joshi, Segev BenZvi, C. Rivière, Meghan Tanner, John Matthews, Harm Schoorlemmer, E. Tabachnick, Pedro Miranda-Romagnoli, R. Noriega-Papaqui, J. A. Goodman, E. De la Fuente, D. Avila Rojas, Jose Andres Garcia-Gonzalez, William H. Lee, Nissim Illich Fraija, Dezhi Huang, Karen S. Caballero-Mora, J. P. Harding, Catalina Espinoza, Ruben Alfaro, Tomás Capistrán, Jesús Martínez-Castro, H. A. Ayala Solares, Daniel Rosa-Gonzalez, S. S. Marinelli, R. W. Springer, Jorge Cotzomi, A. Galván-Gámez, E. G. Pérez-Pérez, Brenda Dingus, Juan Carlos Diaz-Velez, I. Martinez-Castellanos, Umberto Cotti, Sabrina Casanova, J. T. Linnemann, Fernando Garfias, Thomas Weisgarber, E. Ruiz-Velasco, H. León Vargas, and J. C. Arteaga-Velázquez
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Photon, Planck energy, Superluminal motion, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, General Physics and Astronomy, ASTROFÍSICA, Astrophysics, Lorentz covariance, 01 natural sciences, symbols.namesake, Orders of magnitude (time), Observatory, 0103 physical sciences, symbols, 010306 general physics, Astrophysics - High Energy Astrophysical Phenomena, Cherenkov radiation
Abstract: Due to the high energies and long distances to the sources, astrophysical observations provide a unique opportunity to test possible signatures of Lorentz invariance violation (LIV). Superluminal LIV enables the decay of photons at high energy. The High Altitude Water Cherenkov (HAWC) Observatory is among the most sensitive gamma-ray instruments currently operating above 10 TeV. HAWC finds evidence of 100 TeV photon emission from at least four astrophysical sources. These observations exclude, for the strongest of the limits set, the LIV energy scale to $2.2\times10^{31}$ eV, over 1800 times the Planck energy and an improvement of 1 to 2 orders of magnitude over previous limits., Accepted for publication in Physical Review Letters
Published: 2019

39. Measurement of the Crab Nebula Spectrum Past 100 TeV with HAWC

Author: Jorge Cotzomi, Fernando Garfias, Ernesto Belmont-Moreno, S. Kaufmann, Thomas Weisgarber, Jim Hinton, K. Tollefson, E. Ruiz-Velasco, J. A. Morales-Soto, T. Yapici, H. León Vargas, Arturo Iriarte, S. S. Marinelli, R. W. Springer, Simone Dichiara, Harm Schoorlemmer, Umberto Cotti, C. Rivière, Sabrina Casanova, V. Joshi, R. Noriega-Papaqui, E. G. Pérez-Pérez, William H. Lee, Maria Magdalena González, Jose Andres Garcia-Gonzalez, J. C. Arteaga-Velázquez, O. Martinez, S. Hernandez, Andrea Albert, A. Galván-Gámez, V. Baghmanyan, David Kieda, A. Carraminana, J. A. Goodman, M. J. F. Rosenberg, R. Arceo, Brenda Dingus, Joe Lundeen, S. Coutiño de León, Pooja Surajbali, C. Alvarez, C. M. Hui, O. Tibolla, Gus Sinnis, Chad Brisbois, Michael DuVernois, J. Wood, Meghan Tanner, Z. Ren, R. W. Ellsworth, Brian Fick, E. Moreno, Filiberto Hueyotl-Zahuantitla, Alejandro Lara, Hao Zhou, Petra Hüntemeyer, Binita Hona, Karen S. Caballero-Mora, J. D. Álvarez, Catalina Espinoza, J. T. Linnemann, C. De León, Jesús Martínez-Castro, H. A. Ayala Solares, J. Pretz, Nissim Illich Fraija, E. De la Fuente, I. Martinez-Castellanos, D. Avila Rojas, L. Nellen, Armelle Jardin-Blicq, Ruben Alfaro, Ibrahim Torres, Kelly Malone, M. Seglar Arroyo, Alison Peisker, A. Sandoval, A. Nayerhoda, Michael Schneider, J. R. Angeles Camacho, Henrike Fleischhack, F. Salesa Greus, Daniel Rosa-Gonzalez, Segev BenZvi, A. J. Smith, J. P. Harding, Kristi Engel, John Matthews, Juan Carlos Diaz-Velez, Chang Dong Rho, Tomás Capistrán, Humberto Ibarguen Salazar, Mehr Nisa, Michael Newbold, Miguel Mostafa, Anushka Udara Abeysekara, Gilgamesh Luis-Raya, E. Tabachnick, Anna Lia Longinotti, A. Zepeda, K. P. Arunbabu, S. Westerhoff, H. Martínez-Huerta, and Pedro Miranda-Romagnoli
Subjects: HAWC - Abteilung Hinton, High Energy Astrophysical Phenomena (astro-ph.HE), Astroparticle physics, Physics, ISM: individual objects (Crab Nebula), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy, Astronomy and Astrophysics, gamma rays: general, acceleration of particles, astroparticle physics, Crab Nebula, Space and Planetary Science, ACELERAÇÃO DE PARTÍCULAS, High Energy Physics::Experiment, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract: We present TeV gamma-ray observations of the Crab Nebula, the standard reference source in ground-based gamma-ray astronomy, using data from the High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory. In this analysis we use two independent energy-estimation methods that utilize extensive air shower variables such as the core position, shower angle, and shower lateral energy distribution. In contrast, the previously published HAWC energy spectrum roughly estimated the shower energy with only the number of photomultipliers triggered. This new methodology yields a much improved energy resolution over the previous analysis and extends HAWC's ability to accurately measure gamma-ray energies well beyond 100 TeV. The energy spectrum of the Crab Nebula is well fit to a log parabola shape $\left(\frac{dN}{dE} = \phi_0 \left(E/\textrm{7 TeV}\right)^{-\alpha-\beta\ln\left(E/\textrm{7 TeV}\right)}\right)$ with emission up to at least 100 TeV. For the first estimator, a ground parameter that utilizes fits to the lateral distribution function to measure the charge density 40 meters from the shower axis, the best-fit values are $\phi_o$=(2.35$\pm$0.04$^{+0.20}_{-0.21}$)$\times$10$^{-13}$ (TeV cm$^2$ s)$^{-1}$, $\alpha$=2.79$\pm$0.02$^{+0.01}_{-0.03}$, and $\beta$=0.10$\pm$0.01$^{+0.01}_{-0.03}$. For the second estimator, a neural network which uses the charge distribution in annuli around the core and other variables, these values are $\phi_o$=(2.31$\pm$0.02$^{+0.32}_{-0.17}$)$\times$10$^{-13}$ (TeV cm$^2$ s)$^{-1}$, $\alpha$=2.73$\pm$0.02$^{+0.03}_{-0.02}$, and $\beta$=0.06$\pm$0.01$\pm$0.02. The first set of uncertainties are statistical; the second set are systematic. Both methods yield compatible results. These measurements are the highest-energy observation of a gamma-ray source to date., Comment: published in ApJ
Published: 2019

40. Search for Gamma-ray Spectral Lines from Dark Matter Annihilation in Dwarf Galaxies with the High-Altitude Water Cherenkov Observatory

Author: J. A. Morales-Soto, Hao Zhou, K. Malone, C. Alvarez, Ernesto Belmont-Moreno, E. Tabachnick, A. Galván-Gámez, E. De la Fuente, D. Avila Rojas, Tomás Capistrán, C. De León, J. P. Harding, Brenda Dingus, Arturo Iriarte, J. C. Arteaga-Velázquez, O. Martinez, P. Huentemeyer, Andrea Albert, James W. Wood, K. Tollefson, Binita Hona, Juan Carlos Diaz-Velez, Dezhi Huang, Alison Peisker, A. Sandoval, L. Nellen, Michael Schneider, Fernando Garfias, J. T. Linnemann, S. Hernandez, Ibrahim Torres, Nissim Illich Fraija, Thomas Weisgarber, A. Carraminana, Michael DuVernois, R. Noriega-Papaqui, Karen S. Caballero-Mora, Joe Lundeen, H. León Vargas, S. S. Marinelli, C. Brisbois, Catalina Espinoza, I. Martinez-Castellanos, R. W. Springer, Umberto Cotti, Anna Lia Longinotti, E. G. Pérez-Pérez, S. Coutiño de León, Jesús Martínez-Castro, Sabrina Casanova, Kristi Engel, H. A. Ayala Solares, Alejandro Lara, J. A. Goodman, Jose Andres Garcia-Gonzalez, Jorge Cotzomi, F. Salesa Greus, O. Tibolla, Ruben Alfaro, R. Torres-Escobedo, Simone Dichiara, Daniel Rosa-Gonzalez, Chang Dong Rho, John Matthews, Humberto Ibarguen Salazar, Michael Newbold, Miguel Mostafa, V. Joshi, Pedro Miranda-Romagnoli, M. J. F. Rosenberg, A. Zepeda, K. P. Arunbabu, Gilgamesh Luis-Raya, E. Moreno, Maria Magdalena González, Filiberto Hueyotl-Zahuantitla, Segev BenZvi, A. Nayerhoda, and M. U. Nisa
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Annihilation, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Gamma ray, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Effects of high altitude on humans, Spectral line, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Observatory, Astrophysics - High Energy Astrophysical Phenomena, Cherenkov radiation, Dwarf galaxy
Abstract: Local dwarf spheroidal galaxies (dSphs) are nearby dark-matter dominated systems, making them excellent targets for searching for gamma rays from particle dark matter interactions. If dark matter annihilates or decays directly into two gamma rays (or a gamma ray and a neutral particle), a monochromatic spectral line is created. At TeV energies, no other processes are expected to produce spectral lines, making this a very clean indirect dark matter search channel. With the development of event-by-event energy reconstruction, we can now search for spectral lines with the High Altitude Water Cherenkov (HAWC) Observatory. HAWC is a wide field of view survey instrument located in central Mexico that observes gamma rays from 100 TeV. In this work we present results from a recent search for spectral lines from local, dark matter dominated dwarf galaxies using 1038 days of HAWC data. We also present updated limits on several continuum channels that were reported in a previous publication. Our gamma-ray spectral line limits are the most constraining obtained so far from 20 TeV to 100 TeV., submitted to PRD
Published: 2019
Full Text: View/download PDF

41. Combined Dark Matter searches towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, HESS, MAGIC and VERITAS

Author: Dirk Lennarz, Luis Villaseñor, Gernot Maier, Anne Lemiere, Daniel Rosa-Gonzalez, Samuel Timothy Spencer, Wystan Benbow, Victor Barbosa Martins, Raul Prado, Arache Djannati-Ataï, Regis Terrier, Dan Parsons, Francisco Salesa Greus, Dmitriy Kostunin, Joshua Wood, Carlo Romoli, César Alvarez, Carlo van Rensburg, Massimo Capasso, Sajan Kumar, P. Reichherzer, Anton Dmytriiev, Stefan Ohm, Chiara Giuri, Brian van Soelen, G. Peron, Christian Stegmann, Emma Ona-Wilhelmi, S. J. Fegan, Alison Peisker, Hawc, Garret Cotter, Gary Gillanders, Zhiqiu Huang, Krzysztof Katarzynski, Filiberto Hueyotl-Zahuantitla, Ian Herzog, D. A. Prokhorov, K. Kosack, Halim Ashkar, Fabian Leuschner, Manami Sasaki, Michael Schneider, Joe Lundeen, Markus Boettcher, Brian Humensky, Isak Delberth Davids, A. Fiasson, Stefan Wagner, Andreas Zech, Yasunobu Uchiyama, David Kieda, Michael DuVernois, Albert Seyffert, Gianluca Giavitto, Qi Feng, Andreas Specovius, Andrew James Smith, Catherine Boisson, L. Mohrmann, Roberta Zanin, Marek Jamrozy, Tomás Capistrán Rojas, K. Nakashima, Jamie Holder, Hao Zhou, Thomas Lohse, Mireia Nievas-Rosillo, Samuel Zouari, Ira Jung, Sebastian Panny, K. Bernloehr, Deivid Ribeiro, Andrea Santangelo, Kristi Engel, Josefa Becerra Gonzalez, Thomas Tavernier, Ke Fang, Rishi Babu, Yu Wun Wong, Gerd J. Kunde, Jean-Pierre Ernenwein, Henrike Fleischhack, P. T. O'Brien, Clemens Hoischen, A. A. Zdziarski, Kelly Malone, Helene Sol, Markus Holler, Manel Errando, Atreyee Sinha, Francois Brun, Heinrich J. Völk, Sumari Hattingh, Kirsten Tollefson, Johann van der Walt, Q. Remy, Felix Jankowsky, Samridha Kunwar, Johannes Veh, M. Fuessling, P. Vincent, Harm Schoorlemmer, Stefano Gabici, Miguel Mostafa, Tyler Williamson, Jacek Niemiec, Michal Ostrowski, J.-P. Lenain, Israel Martinez Castellanos, Felix Aharonian, Tadayuki Takahashi, Gerd Puehlhofer, Lei Sun, Jesús Martínez-Castro, Pooja Surajbali, Andrés Sandoval, Hugh Spackman, Takaaki Tanaka, Segev BenZvi, Alexandre Marcowith, Felix Werner, Olaf Reimer, Vincent Marandon, Alberto Carramiñana, S. Steinmassl, Mary Kertzman, Hannes Thiersen, Victor Doroshenko, Michael Backes, Hannah Jhee, G. Lamanna, Marcos Santander, Angel Noel, W. Jin, Gus Sinnis, B. Rudak, Alasdair E. Gent, Kathrin Egberts, Jonathan Mackey, Fernando Ureña-Mena, Paolo Marchegiani, Sonal Ramesh Patel, Laenita Lorraine Oberholzer, Tim Holch, Sami Caroff, Heiko Salzmann, E. Kasai, Alison Mitchell, Gregory Foote, Nukri Komin, Tom Armstrong, Michelle Hui, Ruo-Yu Shang, Binita Hona, Raquel Diaz Hernandez, Vardan Baghmanyan, Celine Armand, Alejandro Lara, David Berley, Hector Rueda Ricarte, Nissim Illich Fraija, Naomi Tsuji, Gaurang Yodh, Stefan Funk, Alicja Wierzcholska, Conor McGrath, Gerard Fontaine, C. Moore, Vikas Joshi, Dorit Glawion, T. Chand, M. U. Nisa, M.-H. Grondin, Arnaud Mares, David Sanchez, Ernesto Belmont-Moreno, Thomas Murach, Eucario Gonzalo Pérez Pérez, Paul Reynolds, Ignacio Taboada, Xiaojie Wang, Lucy Fortson, Martin Tluczykont, Thomas Brian Humensky, Juan de Dios Álvarez Romero, Robert Ellsworth, Hester Schutte, Justine Devin, Constantin Steppa, Richard White, Rachel Simoni, Karen S. Caballero Mora, Elisa Pueschel, Jason Fan, Tomasz Bulik, Lukas Nellen, Malgorzata Curlo, Lente Dreyer, J. Patrick Harding, Gilles Maurin, Humberto Martínez Huerta, Riaan Steenkamp, Arnulfo Zepeda, Johannes Schaefer, Werner Hofmann, Jim Hinton, Michael Punch, S. Sailer, Dmitry Khangulyan, Sergio Hernández Cadena, Charles Thorpe-Morgan, M. Hörbe, Stephan O'Brien, Ramin Marx, John L. Quinn, J. F. Glicenstein, V. Sahakian, M. Panter, Mora Durocher, U. Katz, Jacco Vink, Umberto Cotti, Tobias Kleiner, Petra Hüntemeyer, David Huber, Ullrich Schwanke, Diego Garcia Aguilar, Vladimir Vassiliev, Oscar Martinez, J. Bolmont, Cederik León de León, Brian Fick, Laura Olivera-Nieto, A. Yusafzai, David Hanna, James Buckley, Lorenzo Diaz, Yves Gallant, Guillermo García-Torales, Arun Babu Kollamparambil, James Ryan, Kayla Farrell, Sabrina Casanova, Bruno Khelifi, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Mateo Fernandez Alonso, Matthew Lundy, Faical Ait-Benkhali, Jean Damascene Mbarubucyeye, Wlodek Kluzniak, Jorge Luis Flores, Ibrahim Torres, Jordan A. Goodman, Anita Reimer, Adam Otte, Eduardo Moreno Barbosa, M. J. Lang, Frank M. Rieger, Elijah Willox, Colin Adams, Pedro Miranda-Romagnoli, Louis Du Plessis, Andrea Albert, Orel Gueta, Anna Barnacka, Brenda Dingus, Gašper Kukec Mezek, Hazal Goksu, Jorge Cotzomi, William H. Lee, Ruben Alfaro, Glenn Sembroski, David A. Williams, Eduardo de la Fuente, Anu Kundu, Dezhi Huang, Brian Reville, Connor Duffy, Edna Ruiz-Velasco, Anna Luashvili, Alisha Chromey, Konstantin Pfrang, L. Giunti, Philip Kaaret, Maria Magdalena González, Olivier Hervet, Hermes Leon Vargas, Sébastien Le Stum, Amanda Weinstein, Aryeh Brill, James Davies, Ken Ragan, Santiago Pita, Juan Carlos Arteaga Velazquez, Jason Lee, Sabrina Einecke, Lukasz Stawarz, Iryna Lypova, Julie McEnery, Sara Coutiño de Leon, Dieter Horns, R. J. Tuffs, Christo Venter, Meghan Tanner, Monica Barnard, B. Bi, Yvonne Becherini, Colas Rivière, Iftach Sadeh, Lott Frans, Mischa Breuhaus, Pauline Chambery, C. Levy, Jose Luis García-Luna, Michelle Tsirou, D. Malyshev, Ramiro Torres Escobedo, Hassan Abdalla, Hambeleleni Ndiyavala, Chang Dong Rho, Jhilik Majumdar, Martin Pohl, Mathieu Bony, Oguzhan Anguener, Hend Yassin, Gwenael Giacinti, Manuel Meyer, Arturo Iriarte, John Matthews, Kirsty Feijen, Ahron S. Barber, Floriane Cangemi, Fernando Garfias, R. A. Ong, Thomas Weisgarber, Thomas Bylund, Gilgamesh Luis-Raya, Rowan Batzofin, Mathieu Naurois, Jacques Muller, Avery Archer, Andreas Quirrenbach, Anushka Udara Abeysekara, José Serna-Franco, Hugo Alberto Ayala Solares, Davit Zargaryan, Rubén López-Coto, Reshmi Mukherjee, Andreas Zmija, Guillem Marti'i-Devesa, Sameer Patel, M. Lemoine-Goumard, Roberto Noriega-Papaqui, Gaëtan Fichet de Clairfontaine, Axel Donath, A. W. Chen, Michael Kreter, Yunior Pérez Araujo, Anna Lia Longinotti, Michael Zacharias, Kleopas Shiningayamwe, Robert Brose, Fabian Schüssler, Emmanuel Moulin, Patrick Moriarty, Edna Ruiz Velasco, Michael Newbold, Oscar Chaparro-Amaro, J. T. Linnemann, Lenka Tomankova, Jodi Christiansen, Jaqueline Catalano, Ian James Watson, R. Konno, Andrew Taylor, C. Arcaro, Jason John Watson, Gavin Rowell, Daniel Omar Avila Rojas, Denys Malyshev, Emmet Roache, Rhiannon Turner, Chad Brisbois, Mohanraj Senniappan, José Roberto Angeles Camacho, Daniel Nieto, V. Poireau, Jimmy N.S. Shapopi, G. Vasileiadis, Hannah Dalgleish, donggeun tak, Juan Carlos Díaz Vélez, Armelle Jardin-Blicq, N. Zywucka, Abe Falcone, Nicola Omodei, Matthieu Renaud, German Hermann, Paul Morris, Maria Haupt, Stefan Klepser, Christopher van Eldik, Rafal Moderski, Alessandro Montanari, Amy Furniss, Sylvia Zhu, P. J. Meintjes, David Berge, Jose Andres Garcia-Gonzalez, Humberto Ibarguen Salazar, Wayne Robert Springer, Heike Prokoph, Marion Spir-Jacob, Amid Nayerhoda, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire d'Annecy de Physique des Particules (LAPP), Fermi-LAT, HAWC, H.E.S.S., MAGIC, and VERITAS
Subjects: Cherenkov detector, air, Cherenkov counter: water, Physics beyond the Standard Model, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, satellite, FOS: Physical sciences, IACT, Astrophysics, 01 natural sciences, GLAST, dark matter, law.invention, law, HESS, 0103 physical sciences, 010306 general physics, Cherenkov radiation, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Annihilation, 010308 nuclear & particles physics, background, new physics, imaging, sensitivity, MAGIC, Galaxy, Automatic Keywords, annihilation, VERITAS, galaxy, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], statistical, HAWC, Fermi Gamma-ray Space Telescope
Abstract: 36th International Cosmic Ray Conference, ICRC2019, Madison, USA, 24 Jul 2019 - 1 Aug 2019; 9 pages (2019)., The search for Dark Matter (DM) has great potential to reveal physics beyond the Standard Model. As such, searches for evidence of DM particles are being carried out using a wide range of techniques, such as direct searches for DM particles, searches for DM produced with colliders, and indirect searches for the Standard Model annihilation products of DM. Dwarf spheroidal galaxies (dSphs) are excellent targets for indirect Dark Matter searches due to their relatively high DM content and negligible expected astrophysical background. A collaboration was formed to maximise the sensitivity of DM searches towards dSphs by combining for the first time dSph data from three imaging air Cherenkov telescope (IACT) arrays: HESS, MAGIC, and VERITAS; the Fermi-LAT satellite, and the water Cherenkov detector HAWC. Due to the diverse nature of the instruments involved, each experiment will analyse their individual datasets from multiple targets and then the results will be combined at the likelihood level. For consistency of the likelihoods across the five experiments, a common approach is used to treat the astrophysical factor (J-Factor) for each target and an agreed set of annihilation channels are considered. We also agree on a common statistical approach and treatment of instrumental systematic uncertainties. The results are presented in terms of constraints on the velocity-weighted cross section for DM self-annihilation as a function of the DM particle mass.
Published: 2019
Full Text: View/download PDF

42. Dynamical pattern formation in a low-concentration magnetorheological fluid under two orthogonal sinusoidal fields

Author: Pedro Miranda-Romagnoli, J.M. Sausedo-Solorio, L.D. Yépez, J. L. Carrillo, and F. Donado
Subjects: Physics, Field (physics), Pattern formation, Vertical plane, 02 engineering and technology, Mechanics, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Horizontal plane, 01 natural sciences, Electronic, Optical and Magnetic Materials, Superposition principle, Classical mechanics, 0103 physical sciences, Magnetorheological fluid, Perpendicular, 010306 general physics, 0210 nano-technology, Transport phenomena
Abstract: The dynamical pattern formation of clusters of magnetic particles in a low-concentration magnetorheological fluid, under the influence of a superposition of two perpendicular sinusoidal fields, is studied experimentally. By varying the frequency and phase shift of the perpendicular fields, this configuration enables us to experimentally analyze a wide range of field configurations, including the case of a pure rotating field and the case of an oscillating unidirectional field. The fields are applied parallel to the horizontal plane where the fluid lies or in the vertical plane. For fields applied in the horizontal plane, we observed that, when the ratio of the frequencies increases, the average cluster size exhibits a kind of periodic resonances. When the phase shift between the fields is varied, the average chain length reaches maximal values for the cases of the rotating field and the unidirectional case. We analyze and discuss these results in terms of a weighted average of the time-dependent Mason number. In the case of a rotating field on the vertical plane, we also observe that the competition between the magnetic and the viscous forces determines the average cluster size. We show that this configuration generates a series of physically meaningful self-organization of clusters and transport phenomena.
Published: 2016
Full Text: View/download PDF

43. Constraining the p¯/p ratio in TeV cosmic rays with observations of the Moon shadow by HAWC

Author: Ernesto Belmont-Moreno, John N. Wood, E. G. Pérez-Pérez, Kelly Malone, R. W. Springer, J. C. Arteaga-Velázquez, M. J. Martínez González, Arturo Iriarte, A. J. S. Smith, S. Hernandez, Ruben Alfaro, E. Moreno, Edna Ruiz-Velasco, Pooja Surajbali, Andrés Sandoval, O. Martinez, Daniel Rosa-Gonzalez, C. M. Hui, Simone Dichiara, A. González Muñoz, F. Salesa Greus, C. De León, Tomás Capistrán, L. Villaseñor, Anushka Udara Abeysekara, Thomas Weisgarber, Nissim Illich Fraija, J. A. Matthews, G. Sinnis, M. Seglar Arroyo, O. Enríquez-Rivera, Pedro Miranda-Romagnoli, James E. Braun, H. León Vargas, Ibrahim Torres, Petra Hüntemeyer, R. López-Coto, Michael Schneider, S. Westerhoff, Armelle Jardin-Blicq, Chang Dong Rho, Henrike Fleischhack, C. Alvarez, Omar Tibolla, Binita Hona, Jorge Cotzomi, Jdr Alvarez, S. Kaufmann, E. De la Fuente, A. Albert, D. Avila Rojas, R. Arceo, G. B. Yodh, T. Yapici, Z. Hampel-Arias, L. Nellen, Chad Brisbois, S. Coutiño de León, M. J. F. Rosenberg, Michael DuVernois, M. Castillo, R. Diaz Hernandez, J. P. Harding, Jose Andres Garcia-Gonzalez, Gilgamesh Luis-Raya, Alejandro Lara, J. Pretz, Anna Lia Longinotti, Kristi Engel, H. Martínez-Huerta, Hongyan Zhou, Umberto Cotti, Z. Ren, Filiberto Hueyotl-Zahuantitla, I. Taboada, Sabrina Casanova, V. Joshi, A. Zepeda, Harm Schoorlemmer, Miguel Mostafa, Michael Newbold, Karen S. Caballero-Mora, Jesús Martínez-Castro, H. A. Ayala Solares, Colas Rivière, R. Pelayo, A. Carraminana, R. Noriega-Papaqui, William H. Lee, S. Y. BenZvi, R. W. Ellsworth, M. U. Nisa, J. T. Linnemann, R. Luna-Garcia, I. Martinez-Castellanos, A. Galván-Gámez, Brenda Dingus, and S. S. Marinelli
Subjects: Physics, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Cosmic ray, Astrophysics, 01 natural sciences, Magnetic field, Earth's magnetic field, Deflection (physics), Observatory, Antiproton, Physics::Space Physics, 0103 physical sciences, 010306 general physics, Cherenkov radiation
Abstract: An indirect measurement of the antiproton flux in cosmic rays is possible as the particles undergo deflection by the geomagnetic field. This effect can be measured by studying the deficit in the flux, or shadow, created by the Moon as it absorbs cosmic rays that are headed towards the Earth. The shadow is displaced from the actual position of the Moon due to geomagnetic deflection, which is a function of the energy and charge of the cosmic rays. The displacement provides a natural tool for momentum/charge discrimination that can be used to study the composition of cosmic rays. Using 33 months of data comprising more than 80 billion cosmic rays measured by the High Altitude Water Cherenkov (HAWC) observatory, we have analyzed the Moon shadow to search for TeV antiprotons in cosmic rays. We present our first upper limits on the $\bar{p}/p$ fraction, which in the absence of any direct measurements, provide the tightest available constraints of $\sim1\%$ on the antiproton fraction for energies between 1 and 10 TeV.
Published: 2018
Full Text: View/download PDF

44. Milagro limits and HAWC sensitivity for the rate-density of evaporating Primordial Black Holes

Author: Humberto Ibarguen Salazar, H. Martinez, J. Braun, Miguel Mostafa, B. Patricelli, Arnulfo Zepeda, Ibrahim Torres, J. McEnery, Varlen Grabski, H. León Vargas, R. Arceo, A. Marinelli, N. Bautista-Elivar, W.H. Lee, E. Moreno, V. Vasileiou, D.A. Williams, J.C. Arteaga-Velázquez, R. Noriega-Papaqui, C. M. Hui, A. A. Abdo, K. Sparks Woodle, F. Salesa, J. P. Harding, Michael DuVernois, Hao Zhou, P. Karn, R. A. Caballero-Lopez, Peter Nemethy, A. Sandoval, D. Berley, James M. Ryan, E. De la Fuente, Michael Schneider, T. Weisgarber, Fernando Garfias, Dirk Lennarz, Tyce DeYoung, E. Mendoza Torres, P.A. Toale, O. Martinez, S. Westerhoff, Petra Hüntemeyer, R. Diaz Hernandez, J. Martínez-Castro, Joshua A. Wood, Rodrigo Pelayo, B. T. Allen, E. Belmont, E. Ruiz-Velasco, A. Galindo, Z. Hampel-Arias, T. N. Ukwatta, A. J. Smith, Alberto Carramiñana, M. Bonilla Rosales, Alejandro Lara, Michael Newbold, J.H. MacGibbon, L. Nellen, Juan Carlos Diaz-Velez, R. Luna-GarcIa, C. M. Hoffman, D. W. Fiorino, C. Rivière, T. Aune, A. Imran, P.W. Younk, Segev BenZvi, J.A.J. Matthews, L. Villaseñor, J. A. Goodman, Ruben Alfaro, Daniel Rosa-Gonzalez, M. Gussert, C. De León, G. Sinnis, J. Becerra González, Daniel R. Stump, E.C. Linares, S.S. Marinelli, Jennifer Pretz, Anushka Udara Abeysekara, T. Morgan, Pedro Miranda-Romagnoli, A. Iriarte, P. M. Saz Parkinson, Jorge Cotzomi, M. Longo, Umberto Cotti, G.J. Kunde, T. Oceguera-Becerra, K. Tollefson, Maria Magdalena González, R. J. Lauer, E. Hays, D. Zaborov, Karen S. Caballero-Mora, H. A. Ayala Solares, J. D. Álvarez, G. B. Yodh, J. T. Linnemann, L. Diaz-Cruz, Allen Mincer, B. M. Baughman, A. S. Barber, G. E. Christopher, R. W. Ellsworth, S. Silich, B.E. Kolterman, M. Castillo, Nissim Illich Fraija, Brenda Dingus, I. Taboada, I.G. Wisher, R. W. Springer, E. G. Pérez-Pérez, C. Alvarez, and David Kieda
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astronomy, FOS: Physical sciences, Primordial black hole, Astronomy and Astrophysics, Gamma-ray astronomy, Astrophysics, Black hole, Observatory, Milagro, Gamma-ray burst, Astrophysics - High Energy Astrophysical Phenomena, Cherenkov radiation
Abstract: Primordial Black Holes (PBHs) are gravitationally collapsed objects that may have been created by density fluctuations in the early universe and could have arbitrarily small masses down to the Planck scale. Hawking showed that due to quantum effects, a black hole has a temperature inversely proportional to its mass and will emit all species of fundamental particles thermally. PBHs with initial masses of ~5.0 x 10^14 g should be expiring in the present epoch with bursts of high-energy particles, including gamma radiation in the GeV - TeV energy range. The Milagro high energy observatory, which operated from 2000 to 2008, is sensitive to the high end of the PBH evaporation gamma-ray spectrum. Due to its large field-of-view, more than 90% duty cycle and sensitivity up to 100 TeV gamma rays, the Milagro observatory is well suited to perform a search for PBH bursts. Based on a search on the Milagro data, we report new PBH burst rate density upper limits over a range of PBH observation times. In addition, we report the sensitivity of the Milagro successor, the High Altitude Water Cherenkov (HAWC) observatory, to PBH evaporation events., Comment: Accepted to Astroparticle Physics Journal (25 Pages, 3 figures and 7 tables). Corresponding author: T. N. Ukwatta
Published: 2015
Full Text: View/download PDF

45. A Search for Dark Matter in the Galactic Halo with HAWC

Author: E. Moreno, D. W. Fiorino, Andrea Albert, J. Pretz, Benjamin R. Safdi, Dirk Lennarz, Luis Villaseñor, R. Arceo, Chad Brisbois, Michael DuVernois, R. Luna-Garcia, A. Carraminana, Giacomo Vianello, J. A. Goodman, A. Zepeda, J. P. Harding, J. T. Linnemann, Maria Magdalena González, R. J. Lauer, A. Becerril, Fernando Garfias, Thomas Weisgarber, Juan Carlos Diaz-Velez, Karen S. Caballero-Mora, Ruben Alfaro, E. Ruiz-Velasco, Jesús Martínez-Castro, A. Hernandez-Almada, Tomás Capistrán, Nicholas L. Rodd, H. A. Ayala Solares, O. Enríquez-Rivera, I. Martinez-Castellanos, Ernesto Belmont-Moreno, Daniel Rosa-Gonzalez, Z. Ren, Filiberto Hueyotl-Zahuantitla, Miguel Mostafa, Pedro Miranda-Romagnoli, F. Salesa Greus, H. León Vargas, John Matthews, Anushka Udara Abeysekara, Umberto Cotti, C. De León, I. Taboada, Sabrina Casanova, V. Joshi, Segev BenZvi, Michael Newbold, P. W. Younk, E. De la Fuente, D. Avila Rojas, Ibrahim Torres, Jorge Cotzomi, Abel Bernal, J. C. Arteaga-Velázquez, O. Tibolla, Henrike Fleischhack, G. B. Yodh, Kelly Malone, J. D. Álvarez, Kristi Engel, A. Sandoval, Armelle Jardin-Blicq, M. Castillo, R. Noriega-Papaqui, S. Hernandez, M. J. F. Rosenberg, Michael Schneider, I. G. Wisher, A. González Muñoz, William H. Lee, Brenda Dingus, Sarah Kaufmann, James W. Wood, Arturo Iriarte, Gilgamesh Luis-Raya, Kirsten Tollefson, T. Yapici, Rodrigo Pelayo, O. Martinez, S. Westerhoff, Hao Zhou, Petra Hüntemeyer, T. N. Ukwatta, Pooja Surajbali, Gus Sinnis, Jose Andres Garcia-Gonzalez, Nissim Illich Fraija, S. S. Marinelli, R. W. Springer, E. G. Pérez-Pérez, A. J. Smith, C. Alvarez, L. Nellen, Z. Hampel-Arias, R. Diaz Hernandez, Ruben Lopez-Coto, Anna Lia Longinotti, Humberto Ibarguen Salazar, Mehr Nisa, Chang Dong Rho, and HAWC Collaboartion
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Cosmic background radiation, FOS: Physical sciences, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Galactic halo, High Energy Physics - Phenomenology (hep-ph), Observatory, 0103 physical sciences, 010303 astronomy & astrophysics, Cherenkov radiation, Astrophysics::Galaxy Astrophysics, Physics, HAWC - Abteilung Hinton, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, High Energy Physics - Phenomenology, Navarro–Frenk–White profile, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a wide field-of-view observatory sensitive to 500 GeV - 100 TeV gamma rays and cosmic rays. With its observations over 2/3 of the sky every day, the HAWC observatory is sensitive to a wide variety of astrophysical sources, including possible gamma rays from dark matter. Dark matter annihilation and decay in the Milky Way Galaxy should produce gamma-ray signals across many degrees on the sky. The HAWC instantaneous field-of-view of 2 sr enables observations of extended regions on the sky, such as those from dark matter in the Galactic halo. Here we show limits on the dark matter annihilation cross-section and decay lifetime from HAWC observations of the Galactic halo with 15 months of data. These are some of the most robust limits on TeV and PeV dark matter, largely insensitive to the dark matter morphology. These limits begin to constrain models in which PeV IceCube neutrinos are explained by dark matter which primarily decays into hadrons., 24 pages, 11 figures
Published: 2017

46. Search for very-high-energy emission from Gamma-ray Bursts using the first 18 months of data from the HAWC Gamma-ray Observatory

Author: Ignacio Taboada, Daniel Rosa-Gonzalez, U. Cotti, I. Torres, Kristi Engel, C. De León, A. J. Smith, T. Capistrán, S. S. Marinelli, Michael DuVernois, G. Sinnis, Pooja Surajbali, Armelle Jardin-Blicq, K. Malone, Harm Schoorlemmer, C. Rivière, J. D. Álvarez, Edna Ruiz-Velasco, M. Castillo, A. Hernandez-Almada, Fernando Garfias, P. W. Younk, Thomas Weisgarber, A. Zepeda, S. Coutiño Deleón, D. W. Fiorino, Dirk Lennarz, R. Noriega-Papaqui, J. A. Goodman, J. P. Harding, Ernesto Belmont-Moreno, N. Bautista-Elivar, A. Carraminana, A. S. Barber, H. León Vargas, J. Martínez-Castro, F. Salesa Greus, James W. Wood, P. Hüntemeyer, A. Becerril, C. M. Hui, Z. Hampel-Arias, A. Sandoval, Lukas Nellen, T. N. Ukwatta, S. Hernandez, Hao Zhou, Rodrigo Pelayo, R. Arceo, S. Westerhoff, Binita Hona, A. González Muñoz, Chad Brisbois, N. Fraija, A. Iriarte, J. Pretz, Maria Magdalena González, Juan Carlos Diaz-Velez, R. J. Lauer, Abel Bernal, Jose Andres Garcia-Gonzalez, O. Martinez, R. W. Ellsworth, T. Yapici, Michael Schneider, Giacomo Vianello, M. J. F. Rosenberg, Sarah Kaufmann, M. Mostafá, Z. Ren, Tyce DeYoung, Humberto Ibarguen Salazar, G. Luis Raya, Brenda Dingus, Kirsten Tollefson, H. Martínez-Huerta, J. Braun, E. Moreno, R. Luna-Garcia, Karen S. Caballero-Mora, W. H. Lee, I. Martinez-Castellanos, H. A. Ayala Solares, O. Tibolla, J. Cotzomi, R. W. Springer, J.C. Arteaga-Velázquez, E. G. Pérez-Pérez, C. Alvarez, David Kieda, Pedro Miranda-Romagnoli, Chang Dong Rho, J. A. Matthews, M. Newbold, R. Diaz Hernandez, Segev BenZvi, R. Alfaro, Ruben Lopez-Coto, J. T. Linnemann, Anna Lia Longinotti, Sabrina Casanova, V. Joshi, E. De la Fuente, D. Avila Rojas, and M. Gerhardt
Subjects: HAWC - Abteilung Hinton, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, Attenuation, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, 01 natural sciences, Synchrotron, Redshift, law.invention, Space and Planetary Science, law, Observatory, 0103 physical sciences, Satellite, Astrophysics - High Energy Astrophysical Phenomena, Gamma-ray burst, 010303 astronomy & astrophysics, Cherenkov radiation
Abstract: The High Altitude Water Cherenkov (HAWC) Gamma-ray Observatory is an extensive air shower detector operating in central Mexico, which has recently completed its first two years of full operations. If for a burst like GRB 130427A at a redshift of 0.34 and a high-energy component following a power law with index -1.66, the high-energy component is extended to higher energies with no cut-off other than from extragalactic background light attenuation, HAWC would observe gamma rays with a peak energy of $\sim$300 GeV. This paper reports the results of HAWC observations of 64 gamma-ray bursts (GRBs) detected by $\mathit{Swift}$ and $\mathit{Fermi}$, including three GRBs that were also detected by the Large Area Telescope ($\mathit{Fermi}$-LAT). An ON/OFF analysis method is employed, searching on the time scale given by the observed light curve at keV-MeV energies and also on extended time scales. For all GRBs and time scales, no statistically significant excess of counts is found and upper limits on the number of gamma rays and the gamma-ray flux are calculated. GRB 170206A, the third brightest short GRB detected by the Gamma-ray Burst Monitor on board the $\mathit{Fermi}$ satellite ($\mathit{Fermi}$-GBM) and also detected by the LAT, occurred very close to zenith. The LAT measurements can neither exclude the presence of a synchrotron self-Compton (SSC) component nor constrain its spectrum. Instead, the HAWC upper limits constrain the expected cut-off in an additional high-energy component to be less than $100~\rm{GeV}$ for reasonable assumptions about the energetics and redshift of the burst., Comment: 19 pages, 6 figures, published in ApJ
Published: 2017
Full Text: View/download PDF

47. Search for TeV Gamma-Ray Emission from Point-like Sources in the Inner Galactic Plane with a Partial Configuration of the HAWC Observatory

Author: Karen S. Caballero-Mora, N. Bautista-Elivar, R. W. Springer, H. A. Ayala Solares, E. G. Pérez-Pérez, I. Torres, C. M. Hui, Lukas Nellen, O. Tibolla, C. Alvarez, David Kieda, Hao Zhou, P. Hüntemeyer, Segev BenZvi, B. M. Baughman, E. Moreno, J. Pretz, R. Alfaro, Fernando Garfias, Abel Bernal, Anushka Udara Abeysekara, Thomas Weisgarber, M. Newbold, C. Rivière, H. Martinez, M. Gussert, J.C. Arteaga-Velázquez, G. Luis Raya, O. Enríquez-Rivera, T. Yapici, L. Villaseñor, H. León Vargas, J. T. Linnemann, J. P. Harding, A. Zepeda, P. W. Younk, J. A. Goodman, R. Pelayo, G. Sinnis, A. Carraminana, A. S. Barber, J. Martínez-Castro, S. Hernandez, D. W. Fiorino, Dirk Lennarz, R. W. Ellsworth, A. D. Becerril Reyes, A. Iriarte, Humberto Ibarguen Salazar, D. Zaborov, James W. Wood, S. S. Marinelli, J. Braun, Ignacio Taboada, Brenda Dingus, M. Longo, B. Patricelli, W. H. Lee, Michael Schneider, I. G. Wisher, J. A. Matthews, Sabrina Casanova, Tyce DeYoung, A. Imran, J. Cotzomi, M. Mostafá, S. Westerhoff, J. D. Álvarez, Daniel Rosa-Gonzalez, Kirsten Tollefson, M. Castillo, Pedro Miranda-Romagnoli, G. B. Yodh, Maria Magdalena González, R. J. Lauer, Z. Ren, O. Martinez, R. Noriega-Papaqui, S. Coutiño de León, Alejandro Lara, Michael DuVernois, P. Karn, A. Sandoval, E. De la Fuente, E. Belmont, K. Vrabel, Z. Hampel-Arias, T. N. Ukwatta, K. Malone, U. Cotti, A. J. Smith, T. Capistrán, R. Arceo, F. Salesa Greus, C. De León, K. Sparks Woodle, A. Marinelli, and N. Fraija
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), HAWC - Abteilung Hinton, 010308 nuclear & particles physics, Point source, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Galactic plane, 01 natural sciences, Galaxy, Latitude, Space and Planetary Science, Observatory, 0103 physical sciences, Astrophysics - High Energy Astrophysical Phenomena, Longitude, 010303 astronomy & astrophysics, Cherenkov radiation
Abstract: A survey of the inner Galaxy region of Galactic longitude l in [+15, +50] degree and latitude b in [-4,+4] degree is performed using one-third of the High Altitude Water Cherenkov (HAWC) Observatory operated during its construction phase. To address the ambiguities arising from unresolved sources in the data, we use a maximum likelihood technique to identify point source candidates. Ten sources and candidate sources are identified in this analysis. Eight of these are associated with known TeV sources but not all have differential fluxes compatible with previous measurements. Three sources are detected with significances $>5\,\sigma$ after accounting for statistical trials, and are associated with known TeV sources., Comment: Submitted to ApJ, 34 pages, 6 figures. Contact authors: Hao Zhou and C. Michelle Hui
Published: 2016

48. A Neuro Fuzzy Solution in the Design of Analog Circuits

Author: Juan Carlos Seck-Tuoh-Mora, Pedro Miranda-Romagnoli, and Norberto Hernandez-Romero
Subjects: Adaptive neuro fuzzy inference system, Artificial neural network, Analogue electronics, Neuro-fuzzy, Computer science, Applied Mathematics, Fuzzy control system, Computer Graphics and Computer-Aided Design, Fuzzy logic, Fuzzy electronics, Control theory, Signal Processing, Convergence (routing), Electrical and Electronic Engineering
Abstract: A neuro fuzzy method to design analog circuits is explained, where the universe of discourse of the fuzzy system is adjusted by means of a self-organized artificial neural network. As an example of this approach, an op-amp is optimized in order to hold a predetermined aim; where the unity gain bandwidth is an objective of design, and the restrictions of open-loop gain and margin phase are treated as objectives too. Firstly, the experience of the behavior of the circuit is obtained, hence an inference system is constructed and a neural network is applied to achieve a faster convergence into a desired solution. This approach is characterized by having a simple implementation, a very natural understanding and a better performance than static methods of fuzzy optimization.
Published: 2011
Full Text: View/download PDF

49. Publisher Correction: Very-high-energy particle acceleration powered by the jets of the microquasar SS 433

Author: S. Hernandez, S. Dichiara, C. De León, Ernesto Belmont-Moreno, Jim Hinton, Jose Andres Garcia-Gonzalez, Sarah Kaufmann, Harm Schoorlemmer, C. M. Hui, E. Moreno, Hao Zhou, R. Noriega-Papaqui, Armelle Jardin-Blicq, William H. Lee, Gilgamesh Luis-Raya, Hui Li, Maria Magdalena González, R. J. Lauer, C. Rivière, Miguel Mostafa, Kirsten Tollefson, S. S. Marinelli, A. Sandoval, J. P. Harding, O. Tibolla, S. Coutiño de León, Michael Schneider, Luis Villaseñor, J. C. Arteaga-Velázquez, R. W. Springer, J. D. Álvarez, Z. Ren, Ruben Alfaro, Pooja Surajbali, Gus Sinnis, J. A. Goodman, Filiberto Hueyotl-Zahuantitla, Z. Hampel-Arias, E. G. Pérez-Pérez, Daniel Rosa-Gonzalez, C. Alvarez, A. Zepeda, L. Nellen, Petra Hüntemeyer, Brenda Dingus, Anna Lia Longinotti, Fernando Garfias, Thomas Weisgarber, Arturo Iriarte, E. De la Fuente, F. Werner, D. Avila Rojas, E. Ruiz-Velasco, F. Salesa Greus, A. González-Muñoz, A. Carraminana, Kristi Engel, H. León Vargas, M. U. Nisa, R. Arceo, Binita Hona, Henrike Fleischhack, Chang Dong Rho, J. T. Linnemann, Chad Brisbois, Michael DuVernois, M. Seglar Arroyo, T. Yapici, R. W. Ellsworth, Nissim Illich Fraija, Michael Newbold, John Matthews, Giacomo Vianello, I. Martinez-Castellanos, G. B. Yodh, P. Kar, Juan Carlos Diaz-Velez, A. J. Smith, Pedro Miranda-Romagnoli, Jennifer Pretz, Tomás Capistrán, Anushka Udara Abeysekara, James W. Wood, S. Westerhoff, Segev BenZvi, Karen S. Caballero-Mora, Catalina Espinoza, Jesús Martínez-Castro, H. A. Ayala Solares, A. Nayerhoda, Haocheng Zhang, R. López-Coto, Andrea Albert, Kelly Malone, O. Martinez, Jorge Cotzomi, Gerd Joachim Kunde, Ke Fang, Umberto Cotti, A. Galván-Gámez, I. Taboada, Sabrina Casanova, V. Joshi, M. J. F. Rosenberg, M. Castillo, and Ibrahim Torres
Subjects: Physics, Acceleration, Multidisciplinary, High energy particle, 010504 meteorology & atmospheric sciences, 0103 physical sciences, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, 010303 astronomy & astrophysics, 01 natural sciences, 0105 earth and related environmental sciences, Computational physics
Abstract: In this Letter, owing to a production error, the penultimate version of the PDF was published. The HTML version was always correct. The PDF has been corrected online.
Published: 2018
Full Text: View/download PDF

50. Sensitivity of HAWC to high-mass dark matter annihilations

Author: A. S. Barber, A. Imran, T. Oceguera-Becerra, Kevork N. Abazajian, E. C. Linares, Rodrigo Pelayo, B. Patricelli, Petra Hüntemeyer, S. Westerhoff, R. W. Ellsworth, U. Cotti, S. Silich, D. Zaborov, Z. Hampel-Arias, T. N. Ukwatta, D. W. Fiorino, Brenda Dingus, K. Tollefson, L. Villaseñor, J. A. Goodman, A. J. Smith, O. Martinez, E. De la Fuente, R. Luna-Garcia, G. B. Yodh, Anushka Udara Abeysekara, C. De León, M. Castillo, R. W. Springer, E. G. Pérez-Pérez, L. Nellen, Daniel Rosa-Gonzalez, A. Galindo, F. E. Sanchez, E. Belmont, L. Diaz-Cruz, P. W. Younk, J. Pretz, Dirk Lennarz, M. Longo, C. Alvarez, B. M. Baughman, Juan Carlos Diaz-Velez, R. Arceo, David Kieda, Varlen Grabski, R. A. Caballero-Lopez, James M. Ryan, Michael DuVernois, D. Berley, Maria Magdalena González, R. J. Lauer, E. Mendoza Torres, H. Martinez, Tyce DeYoung, P. A. Toale, F. Salesa, Nissim Illich Fraija, J. D. Álvarez, Karen S. Caballero-Mora, Jesús Martínez-Castro, H. A. Ayala Solares, I. Torres, Joshua Wood, Colas Rivière, J. T. Linnemann, M. Bonilla Rosales, Michael Newbold, J. A.J. Matthews, A. Zepeda, Segev BenZvi, Jorge Cotzomi, R. Alfaro, M. Gussert, Pedro Miranda-Romagnoli, Gerd Joachim Kunde, I. Taboada, G. Sinnis, J. Becerra González, A. Sandoval, Michael Schneider, I. G. Wisher, J. P. Harding, Julie McEnery, A. Marinelli, Fernando Garfias, Thomas Weisgarber, Alberto Carramiñana, H. León Vargas, K. Sparks Woodle, Humberto Ibarguen Salazar, J. Braun, Miguel Mostafa, J.C. Arteaga-Velázquez, R. Diaz Hernandez, Arturo Iriarte, N. Bautista-Elivar, C. M. Hui, Hao Zhou, P. Karn, Alejandro Lara, R. Noriega-Papaqui, William H. Lee, and E. Moreno
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Nuclear and High Energy Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Annihilation, Astrophysics::High Energy Astrophysical Phenomena, Hot dark matter, Dark matter, Scalar field dark matter, FOS: Physical sciences, Astronomy, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Galaxy, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Observatory, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics, Dwarf galaxy
Abstract: The High Altitude Water Cherenkov (HAWC) observatory is a wide field-of-view detector sensitive to gamma rays of 100 GeV to a few hundred TeV. Located in central Mexico at 19 degrees North latitude and 4100 m above sea level, HAWC will observe gamma rays and cosmic rays with an array of water Cherenkov detectors. The full HAWC array is scheduled to be operational in Spring 2015. In this paper, we study the HAWC sensitivity to the gamma-ray signatures of high-mass (multi- TeV) dark matter annihilation. The HAWC observatory will be sensitive to diverse searches for dark matter annihilation, including annihilation from extended dark matter sources, the diffuse gamma-ray emission from dark matter annihilation, and gamma-ray emission from non-luminous dark matter subhalos. Here we consider the HAWC sensitivity to a subset of these sources, including dwarf galaxies, the M31 galaxy, the Virgo cluster, and the Galactic center. We simulate the HAWC response to gamma rays from these sources in several well-motivated dark matter annihilation channels. If no gamma-ray excess is observed, we show the limits HAWC can place on the dark matter cross-section from these sources. In particular, in the case of dark matter annihilation into gauge bosons, HAWC will be able to detect a narrow range of dark matter masses to cross-sections below thermal. HAWC should also be sensitive to non-thermal cross-sections for masses up to nearly 1000 TeV. The constraints placed by HAWC on the dark matter cross-section from known sources should be competitive with current limits in the mass range where HAWC has similar sensitivity. HAWC can additionally explore higher dark matter masses than are currently constrained., Comment: 15 pages, 4 figures, version to be published in PRD
Published: 2014
Full Text: View/download PDF

Catalog

Books, media, physical & digital resources

See catalog results

Searchworks

Select search scope, currently: Articles Catalog books, media & more in Jio Institute collections Articles journal articles & other e-resources

Search

Search Constraints

Refine your results

Search Limiters

Topic

Publication Year Range

Language

Publication Type

Journal

Database

Publisher

69 results on '"Pedro Miranda-Romagnoli"'

Search Results

Catalog

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources