@article{0269e40baee54360bd1f50643ba5ba40,
title = "Searching for VHE gamma-ray emission associated with IceCube neutrino alerts using FACT, H.E.S.S., MAGIC, and VERITAS",
abstract = "The realtime follow-up of neutrino events is a promising approach to search for astrophysical neutrino sources. It has so far provided compelling evidence for a neutrino point source: the flaring gamma-ray blazar TXS 0506+056 observed in coincidence with the high-energy neutrino IceCube-170922A detected by IceCube. The detection of very-high-energy gamma rays (VHE, E > 100 GeV) from this source helped establish the coincidence and constrained the modeling of the blazar emission at the time of the IceCube event. The four major imaging atmospheric Cherenkov telescope arrays (IACTs) - FACT, H.E.S.S., MAGIC, and VERITAS - operate an active follow-up program of target-of-opportunity observations of neutrino alerts sent by IceCube. This program has two main components. One are the observations of known gamma-ray sources around which a cluster of candidate neutrino events has been identified by IceCube (Gamma-ray Follow-Up, GFU). Second one is the follow-up of single high-energy neutrino candidate events of potential astrophysical origin such as IceCube-170922A. GFU has been recently upgraded by IceCube in collaboration with the IACT groups. We present here recent results from the IACT follow-up programs of IceCube neutrino alerts and a description of the upgraded IceCube GFU system.",
author = "\{the MAGIC\} and IceCube and FACT and H.E.S.S. and \{VERITAS Collaboration\} and Daniela Dorner and Mezek, \{Ga{\v s}per Kukec\} and R. Abbasi and M. Ackermann and J. Adams and Aguilar, \{J. A.\} and M. Ahlers and M. Ahrens and C. Alispach and Alves, \{A. A.\} and Amin, \{N. M.\} and R. An and K. Andeen and T. Anderson and G. Anton and C. Arg{\"u}elles and Y. Ashida and S. Axani and X. Bai and Balagopal, \{A. V.\} and A. Barbano and Barwick, \{S. W.\} and B. Bastian and V. Basu and S. Baur and R. Bay and Beatty, \{J. J.\} and Becker, \{K. H.\} and \{Becker Tjus\}, J. and C. Bellenghi and S. BenZvi and D. Berley and Elisa Bernardini and Besson, \{D. Z.\} and G. Binder and D. Bindig and E. Blaufuss and S. Blot and M. Boddenberg and F. Bontempo and J. Borowka and S. B{\"o}ser and O. Botner and J. B{\"o}ttcher and E. Bourbeau and F. Bradascio and J. Braun and S. Bron and J. Brostean-Kaiser and S. Browne and A. Burgman and Burley, \{R. T.\} and Busse, \{R. S.\} and Campana, \{M. A.\} and Carnie-Bronca, \{E. G.\} and C. Chen and D. Chirkin and K. Choi and Clark, \{B. A.\} and K. Clark and L. Classen and A. Coleman and Collin, \{G. H.\} and Conrad, \{J. M.\} and P. Coppin and P. Correa and Cowen, \{D. F.\} and R. Cross and C. Dappen and P. Dave and \{De Clercq\}, C. and DeLaunay, \{J. J.\} and H. Dembinski and K. Deoskar and \{De Ridder\}, S. and A. Desai and P. Desiati and \{de Vries\}, \{K. D.\} and \{de Wasseige\}, G. and \{de With\}, M. and T. DeYoung and S. Dharani and A. Diaz and D{\'i}az-V{\'e}lez, \{J. C.\} and M. Dittmer and H. Dujmovic and M. Dunkman and DuVernois, \{M. A.\} and E. Dvorak and T. Ehrhardt and P. Eller and R. Engel and H. Erpenbeck and J. Evans and Evenson, \{P. A.\} and Fan, \{K. L.\} and Fazely, \{A. R.\} and S. Fiedlschuster and Fienberg, \{A. T.\} and Lang, \{M. J.\}",
note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0); 37th International Cosmic Ray Conference, ICRC 2021 ; Conference date: 12-07-2021 Through 23-07-2021",
year = "2022",
month = mar,
day = "18",
language = "English",
volume = "395",
journal = "Proceedings of Science",
issn = "1824-8039",
publisher = "Sissa Medialab Srl",
}