An updated list of target sources for IceCube neutrino cluster alerts

Multimessenger astronomy seeks to uncover the origins of cosmic rays and neutrinos. The IceCube Neutrino Observatory plays a key role in monitoring the sky for revealing high energy neutrinos and neutrino time clusters possibly associated with astrophysical sources, issuing alerts to the astrophysical community for significant excesses. This enables joint observations with other astronomical facilities that could reveal the hidden mechanisms behind the most extreme environments in the Universe. In particular, since 2006 the Gamma-ray Follow-Up (GFU) program shares cluster alerts with partner Imaging Air Cherenkov Telescopes. The faint cosmic signals, searched against large atmospheric backgrounds, are widely masked by the statistical penalties that arise when scanning the full sky in an unbiased way. Hence, targeted analyses of pre-selected neutrino source candidates have proven to increase our search sensitivity. Our understanding of astrophysical environments has improved in recent years, with evidence of neutrino emission from the blazar TXS 0506+056 and the Seyfert galaxy NGC 1068. The aim of expanding observational possibilities and engaging the broader scientific community through public cluster alerts has motivated the creation of a new list of target sources to be monitored by IceCube. This contribution presents the systematic compilation of this list, which extends the well-established focus on gamma-ray bright active galactic nuclei (AGN) to include X-ray bright AGN and binary systems.

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Publication Details

Published
2025-09-23
DOI
https://doi.org/10.22323/1.501.0919
Primary Topic
Astrophysics and Cosmic Phenomena
Type
article
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article

An updated list of target sources for IceCube neutrino cluster alerts

L. Schumacher, L. Köpke, Sofia Athanasiadou, Kiara Carloni et al.
Astrophysics and Cosmic Phenomena
article

An updated list of target sources for IceCube neutrino cluster alerts

L. Schumacher, L. Köpke, Sofia Athanasiadou, Kiara Carloni, Sarah Mechbal, Rishi Babu, Philip Weigel, Arun Vaidyanathan, Thijs van Eeden, Diego Alberto Coloma Borja, G. M. Spiczak, Christy Love, M. Lamoureux, Thien Nhan Chau, Spencer Griswold, Woosik Kang, I. Taboada, Daniel Salazar-Gallegos, S. R. Klein, Michael Campana, James DeLaunay, Frank Schröder, Jonathan Mauro, Felix Schlüter, Delaney Butterfield, C. H. Wiebusch, P. Desiati, Lukas Hennig, Krishnamoorthi Jayakumar, Abdul Rehman, C. De Clercq, K. D. de Vries, Alexander Sandrock, Sebastian Schindler, Yuriy Popovych, Federico Bontempo, Axel Ponten, Hershal Pandya, Ek Narayan Paudel, A. Parenti, G. de Wasseige, Veronika Palušová, A. Haungs, Erik Ganster, Leonora Kardum, Lars Philipp Heuermann, Shefali Shefali, J. Vandenbroucke, Colton Hill, Laurent Arnaud, Frederik Hermann Lauber, J. C. Díaz–Vélez, Richard Naab, Julian Saffer, Christoph Raab, J. V. Santen, Félix Carbonell, Matheus Hostert, Miaochen Jin, Karriem Upshaw, Diyaselis Delgado, G. C. Hill, Ryan T. Burley, Felix Henningsen, Markus Dittmer, J. M. Conrad, P. Eller, S. Yoshida, Julia Book, D. F. Cowen, Nils Heyer, Joelle Savelberg, S. Sarkar, A. R. Fazely, Finn Mayhew, Kaustav Dutta, Bennett Brinson, F. Halzen, Elena Manao, E. Bernardini, Alicia Mand, J. V. Mead, Agnieszka Leszczyńska, Alan Coleman, Leon Hamacher, Kael Hanson, Matthias Thiesmeyer, Oliver Janik, John Rack-Helleis, Thomas Ehrhardt, Maximilian Meier, Martina Karl, C. Pérez de los Heros, Cristina Lagunas Gualda, Uwe Naumann, Emma Kun, Sreetama Goswami, Sanjib Kumar Agarwalla, T. Glüsenkamp, C. Finley, Anna Eimer, Jan Soedingrekso, C. Argüelles, Aishwarya Vijai, Attila Hidvégi, Kathrine Mørch Groth, Christian Spannfellner, Fahim Varsi, Lucas Bloom, Jan Weldert, Barbara Skrzypek, X. Bai, Gaurav Garg, Yuya Makino, M. Kowalski, E. Blaufuss, Seowon Choi, Shannon Gray, V. A. Parrish, Claudio Kopper, D. Chirkin, Vedant Basu, S. Toscano, Gerhard Krieger, Yarno Merckx, Christian Gläser, Alexander Harnisch, Peter Behrens, Donghwa Kang, Kirsten Tollefson, Kareem Ramadan Farrag, S. Ter–Antonyan, J. Böttcher, Erin O’Sullivan, D. Ryckbosch, S. Sclafani, Maria Liubarska, Nora Valtonen-Mattila, Thomas Stuttard, Hannah Erpenbeck, Will Thompson, Sarah Mancina, Lukas Merten, T. Stezelberger, G. W. Sullivan, T. Karg, R. W. Moore, Jakob Beise, Christian Haack, Akanksha Katil, R. Hewett, Simeon Bash, A. Ishihara, Alex Wen, L. Halve, Martin Ha Minh, Daniel Durnford, Zoë Rechav, Francesco Lucarelli, Jeffrey Lazar, A. Obertacke Pollmann, J. S. Gallagher, A. Hallgren, William Luszczak, Leander Fischer, Aske Rosted, Rachel Procter-Murphy, Sharmistha Chattopadhyay, Ava Ghadimi, Jannis Necker, M. Ackermann, W. Iwakiri, Peter John Cusack Coleman, M. J. Larson, Perri Zilberman, Janeth Valverde, Harald Schieler, Yang Lyu, Paras Koundal, Emre Burak Yildizci, K. 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Kolanoski, Ludwig Neste, Nick Schmeisser, Lucas Witthaus, Anke Mosbrugger, Eliot Genton, Teresa Pernice, Patrick Schaile, Martin Langgård Ravn, Leonardo Ricca, L. Lu, Shuo Zhang, Andrew Wang, Li Ruohan, Nobuhiro Shimizu, Yukiho Kobayashi, Alfonso Garcia, Shiqi Yu, Zelong Zhang, Wenjie Hou, Samyak Jain, Justin Mitchell, J. Becker Tjus, Satoshi Fukami, Christoph Günther, Jessie Thwaites, Serap Tilav, Ralph Engel, Najia Moureen Binte Amin, Andreas Weindl, Kendall Mahn, Robert Snihur, Dawn Williams, Arifa Khatee Zathul, Kotoyo Hoshina, Sebastian Vergara Carrasco, Stephanie Hickford, Kara Hoffman, A. Søgaard, Olga Botner, Sally Robertson, D. Seckel, Juliana Stachurska, G. T. Przybylski, Darren Grant, Ryan Bay, Alex Olivas, Juan Pablo Yáñez, T. DeYoung, Delia Tosi, Katherine Rawlins, Torsten Schmidt, Timo Stürwald, M. U. Nisa, Todor Stanev, Andrii Terliuk, Brian Clark, Ioana Codrina Mariş, Christian Spiering, G. B. Yu, D. 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article en

Abstract

Multimessenger astronomy seeks to uncover the origins of cosmic rays and neutrinos. The IceCube Neutrino Observatory plays a key role in monitoring the sky for revealing high energy neutrinos and neutrino time clusters possibly associated with astrophysical sources, issuing alerts to the astrophysical community for significant excesses. This enables joint observations with other astronomical facilities that could reveal the hidden mechanisms behind the most extreme environments in the Universe. In particular, since 2006 the Gamma-ray Follow-Up (GFU) program shares cluster alerts with partner Imaging Air Cherenkov Telescopes. The faint cosmic signals, searched against large atmospheric backgrounds, are widely masked by the statistical penalties that arise when scanning the full sky in an unbiased way. Hence, targeted analyses of pre-selected neutrino source candidates have proven to increase our search sensitivity. Our understanding of astrophysical environments has improved in recent years, with evidence of neutrino emission from the blazar TXS 0506+056 and the Seyfert galaxy NGC 1068. The aim of expanding observational possibilities and engaging the broader scientific community through public cluster alerts has motivated the creation of a new list of target sources to be monitored by IceCube. This contribution presents the systematic compilation of this list, which extends the well-established focus on gamma-ray bright active galactic nuclei (AGN) to include X-ray bright AGN and binary systems.

National Science Foundation, U.S. Department of Energy, University of Wisconsin-Madison, Nvidia, Michigan State University, Villum Fonden, Polarforskningssekretariatet, Marquette University, Western Canada Research Grid, European Commission, National Research Foundation, Deutsche Forschungsgemeinschaft, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Fonds De La Recherche Scientifique - FNRS, Belgian Federal Science Policy Office, Fonds Wetenschappelijk Onderzoek, National Research Foundation of Korea, Knut och Alice Wallenbergs Stiftelse, Vetenskapsrådet, RWTH Aachen University, Chiba University, Helmholtz Alliance for Astroparticle Physics, Alliance de recherche numérique du Canada, College of Engineering, Michigan State University, Natural Sciences and Engineering Research Council of Canada, Deutsches Elektronen-Synchrotron, Japan Society for the Promotion of Science, Marsden Fund, Institute for Global Prominent Research, Chiba University, Office of Polar Programs, Office of Advanced Cyberinfrastructure, Office of Experimental Program to Stimulate Competitive Research
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Astrophysics and Cosmic Phenomena
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