Multimessenger Gamma-Ray and Neutrino Coincidence Alerts using HAWC and IceCube sub-threshold Data
Creators: name: Solares, H. A. Ayala
name: Coutu, S.
name: DeLaunay, J. J.
name: Fox, D. B.
name: Grégoire, T.
name: Keivani, A.
name: Krauß, F.
name: Mostafá, M.
name: Murase, K.
name: Turley, C. F.
name: Albert, A.
name: Alfaro, R.
name: Alvarez, C.
name: Camacho, J. R. Angeles
name: Arteaga-Velázquez, J. C.
name: Arunbabu, K. P.
name: Rojas, D. Avila
name: Belmont-Moreno, E.
name: Brisbois, C.
name: Caballero-Mora, K. S.
name: Carramiñana, A.
name: Casanova, S.
name: Cotti, U.
name: De la Fuente, E.
name: Hernandez, R. Diaz
name: Dingus, B. L.
name: DuVernois, M. A.
name: Durocher, M.
name: Díaz-Vélez, J. C.
name: Espinoza, C.
name: Fan, K. L.
name: Fleischhack, H.
name: Fraija, N.
name: Galván-Gámez, A.
name: Garcia, D.
name: García-González, J. A.
name: Garfias, F.
name: González, M. M.
name: Goodman, J. A.
name: Harding, J. P.
name: Hona, B.
name: Huang, D.
name: Hueyotl-Zahuantitla, F.
name: Huntemeyer, P.
name: Iriarte, A.
name: Jardin-Blicq, A.
name: Joshi, V.
name: Vargas, H. León
name: Linnemann, J. T.
name: Longinotti, A. L.
name: Luis-Raya, G.
name: Lundeen, J.
name: Malone, K.
name: Martinez, O.
name: Martinez-Castellanos, I.
name: Martínez-Castro, J.
name: Matthews, J. A.
name: Miranda-Romagnoli, P.
name: Moreno, E.
name: Nellen, L.
name: Newbold, M.
name: Nisa, M. U.
name: Noriega-Papaqui, R.
name: Peisker, A.
name: Pérez-Pérez, E. G.
name: Rho, C. D.
name: Rosa-González, D.
name: Salazar, H.
name: Greus, F. Salesa
name: Sandoval, A.
name: Smith, A. J.
name: Springer, R. W.
name: Tollefson, K.
name: Torres, I.
name: Torres-Escobedo, R.
name: Ureña-Mena, F.
name: Villaseñor, L.
name: Weisgarber, T.
name: Willox, E.
name: Zepeda, A.
name: Zhou, H.
name: de León, C.
name: Aartsen, M. G.
name: Abbasi, R.
name: Ackermann, M.
name: Adams, J.
name: Aguilar, J. A.
name: Ahlers, M.
name: Ahrens, M.
name: Alispach, C.
name: Amin, N. M.
name: Andeen, K.
name: Anderson, T.
name: Ansseau, I.
name: Anton, G.
name: Argüelles, C.
name: Auffenberg, J.
name: Axani, S.
name: Bagherpour, H.
name: Bai, X.
name: V., A. Balagopal
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name: Baur, S.
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name: Beatty, J. J.
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name: Berley, D.
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name: Bindig, D.
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name: Blot, S.
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name: Friedman, E.
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name: Gallagher, J.
name: Ganster, E.
name: Garrappa, S.
name: Gerhardt, L.
name: Glauch, T.
name: Glüsenkamp, T.
name: Goldschmidt, A.
name: Gonzalez, J. G.
name: Grant, D.
name: Griffith, Z.
name: Griswold, S.
name: Günder, M.
name: Gündüz, M.
name: Haack, C.
name: Hallgren, A.
name: Halliday, R.
name: Halve, L.
name: Halzen, F.
name: Hanson, K.
name: Hardin, J.
name: Haungs, A.
name: Hauser, S.
name: Hebecker, D.
name: Heereman, D.
name: Heix, P.
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name: Hellauer, R.
name: Henningsen, F.
name: Hickford, S.
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name: Hill, C.
name: Hill, G. C.
name: Hoffman, K. D.
name: Hoffmann, R.
name: Hoinka, T.
name: Hokanson-Fasig, B.
name: Hoshina, K.
name: Huang, F.
name: Huber, M.
name: Huber, T.
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name: Hünnefeld, M.
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name: In, S.
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name: Jansson, M.
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name: Kappes, A.
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name: Karle, A.
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name: Kopper, S.
name: Koskinen, D. J.
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name: Kulacz, N.
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name: Leszczyńska, A.
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name: Mariscal, C. J. Lozano
name: Lu, L.
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name: Luszczak, W.
name: Lyu, Y.
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Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: 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 $&lt;1$ 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 $&lt;4$ coincidences per year.
description: 14 pages, 5 figures, 3 tables