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arXiv · 2008.10616

Multimessenger Gamma-Ray and Neutrino Coincidence Alerts using HAWC and IceCube sub-threshold Data

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

The High Altitude Water Cherenkov (HAWC) and IceCube observatories, through the Astrophysical Multimessenger Observatory Network (AMON) framework, have developed a multimessenger joint search for extragalactic astrophysical sources. This analysis looks for sources that emit both cosmic neutrinos and gamma rays that are produced in photo-hadronic or hadronic interactions. The AMON system is running continuously, receiving sub-threshold data (i.e. data that is not suited on its own to do astrophysical searches) from HAWC and IceCube, and combining them in real-time. We present here the analysis algorithm, as well as results from archival data collected between June 2015 and August 2018, with a total live-time of 3.0 years. During this period we found two coincident events that have a false alarm rate (FAR) of $<1$ coincidence per year, consistent with the background expectations. The real-time implementation of the analysis in the AMON system began on November 20th, 2019, and issues alerts to the community through the Gamma-ray Coordinates Network with a FAR threshold of $<4$ coincidences per year.

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H. A. Ayala Solares, S. Coutu, J. J. DeLaunay, D. B. Fox, T. Grégoire, A. Keivani, F. Krauß, M. Mostafá, K. Murase, C. F. Turley, A. Albert, R. Alfaro, C. Alvarez, J. R. Angeles Camacho, J. C. Arteaga-Velázquez, K. P. Arunbabu, D. Avila Rojas, E. Belmont-Moreno, C. Brisbois, K. S. Caballero-Mora, A. Carramiñana, S. Casanova, U. Cotti, E. De la Fuente, R. Diaz Hernandez, B. L. Dingus, M. A. DuVernois, M. Durocher, J. C. Díaz-Vélez, C. Espinoza, K. L. Fan, H. Fleischhack, N. Fraija, A. Galván-Gámez, D. Garcia, J. A. García-González, F. Garfias, M. M. González, J. A. Goodman, J. P. Harding, B. Hona, D. Huang, F. Hueyotl-Zahuantitla, P. Huntemeyer, A. Iriarte, A. Jardin-Blicq, V. Joshi, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis-Raya, J. Lundeen, K. Malone, O. Martinez, I. Martinez-Castellanos, J. Martínez-Castro, J. A. Matthews, P. Miranda-Romagnoli, E. Moreno, L. Nellen, M. Newbold, M. U. Nisa, R. Noriega-Papaqui, A. Peisker, E. G. Pérez-Pérez, C. D. Rho, D. Rosa-González, H. Salazar, F. Salesa Greus, A. Sandoval, A. J. Smith, R. W. Springer, K. Tollefson, I. Torres, R. Torres-Escobedo, F. Ureña-Mena, L. Villaseñor, T. Weisgarber, E. Willox, A. Zepeda, H. Zhou, C. de León, M. G. Aartsen, R. Abbasi, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, C. Alispach, N. M. Amin, K. Andeen, T. Anderson, I. Ansseau, G. Anton, C. Argüelles, J. Auffenberg, S. Axani, H. Bagherpour, X. Bai. 2020-08-24. Multimessenger Gamma-Ray and Neutrino Coincidence Alerts using HAWC and IceCube sub-threshold Data. https://doi.org/10.3847/1538-4357/abcaa4

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