Time-integrated Southern-sky Neutrino Source Searches with 10 yr of IceCube Starting-track Events at Energies Down to 1 TeV

Abstract In the IceCube Neutrino Observatory, a signal of astrophysical neutrinos is obscured by backgrounds from atmospheric neutrinos and muons produced in cosmic-ray interactions. IceCube event selections used to isolate the astrophysical neutrino signal often focus on the morphology of the light patterns recorded by the detector. The analyses presented here use the new IceCube Enhanced Starting Track Event Selection (ESTES), which identifies events likely generated by muon–neutrino interactions within the detector geometry, focusing on neutrino energies of 1–500 TeV with a median angular resolution of 1.4 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mover> <mml:mrow/> <mml:mtext>°</mml:mtext> </mml:mover> </mml:math> . Selecting for starting-track events filters out not only the atmospheric-muon background but also the atmospheric-neutrino background in the southern sky. This improves IceCube’s muon–neutrino sensitivity to southern-sky neutrino sources, especially for Galactic sources that are not expected to produce a substantial flux of neutrinos above 100 TeV. In this work, the ESTES sample was applied for the first time to search for astrophysical sources of neutrinos, including a search for diffuse neutrino emission from the Galactic plane. No significant excesses were identified from any of the analyses; however, constraining limits are set on the hadronic emission from TeV gamma-ray Galactic plane objects and models of the diffuse Galactic plane neutrino flux.

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Publication Details

Journal
The Astrophysical Journal
Published
2026-02-03
DOI
https://doi.org/10.3847/1538-4357/ae2c86
Citations
1
Primary Topic
Astrophysics and Cosmic Phenomena
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article
Field-Weighted Citation Impact
27.96
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article

Time-integrated Southern-sky Neutrino Source Searches with 10 yr of IceCube Starting-track Events at Energies Down to 1 TeV

J.M Alameddine, A. Kochocki, L. Gerhardt, X. P. Xu et al.
1 citations
The Astrophysical Journal
Astrophysics and Cosmic Phenomena
27.96
article

Time-integrated Southern-sky Neutrino Source Searches with 10 yr of IceCube Starting-track Events at Energies Down to 1 TeV

J.M Alameddine, A. Kochocki, L. Gerhardt, X. P. Xu, A. Negi, D. Kang, J. Carpio, J. Y. Book Motzkin, S. Fukami, J. Mitchell, G. C. Hill, F. Lauber, J. Gallagher, T. Kozynets, K. M. Groth, P. Gutjahr, S. Tilav, K. Fang, N. Feigl, R. Naab, G. K. Parker, H. Pandya, L. Draper, G. T. Przybylski, D. Seckel, W. Rhode, J. J. DeLaunay, S. Athanasiadou, J. Osborn, D. Soldin, K. Leonard DeHolton, A. Coleman, K. Noda, T. Ehrhardt, N. Krieger, J. Braun, A. Novikov, B. Schlüter, K. Hultqvist, J. J. Beatty, A. Haungs, M. Neumann, M. Seikh, J. Becker Tjus, B. Brinson, A. Rehman, P. Dierichs, K. Rawlins, N. Kurahashi, A. Hallgren, R SEKHAR BABU, V. O’Dell, R. Hussain, E Rachel Roberts, P. Sampathkumar, E. Genton, Y. Ashida, F. Halzen, M. A. DuVernois, A. Connolly, S. K. Agarwalla, A. Mand, M. Venugopal, H. Hamdaoui, S. N. Zhang, W. G. Thompson, K. Upshaw, C. Raab, C. Lagunas Gualda, A. Granados, J. Stachurska, N. Schmeisser, S. Rodan, S. Ter-Antonyan, B. Riedel, T. Kontrimas, H. Niederhausen, S. Mancina, A. Hidvegi, J. Thwaites, J. Rack-Helleis, L. Neste, V. Basu, K. Hoshina, M. Ravn, M. Seo, A. Fedynitch, S. Jain, R. Orsoe, S. Toscano, H. Schieler, L. Schlickmann, F. G. Schröder, J. Necker, K. D. Hoffman, T. DeYoung, R. Abbasi, J. Häussler, C. Tönnis, J. Liao, D. Ryckbosch, M. Santander, P. Weigel, N. Shimizu, K. Andeen, S. R. Klein, J. Adams, K. Farrag, J. Beise, M. Marsee, J. Hermannsgabner, A. Olivas, S. Hori, N. Whitehorn, A. Karle, D. Z. Besson, J. Saffer, L. Heuermann, J. Schneider, D. F. Cowen, J. Soedingrekso, V. Parrish, C. Wendt, L. Bloom, J. Kiryluk, D. Durnford, L. Pyras, N. van Eijndhoven, A. Obertacke Pollmann, C. Hill, A. Vaidyanathan, Y. Morii, B. Skrzypek, M. Kowalski, C. Boscolo Meneguolo, Y. Popovych, C. Kopper, E. Manao, S. Fiedlschuster, A. Eimer, A. Franckowiak, M. J. Larson, A. Rifaie, D. Grant, S. El Mentawi, B. A. Clark, B Mark Smithers, P. Eller, X. Bai, K. D. de Vries, M. Ackermann, M. Vereecken, M. Handt, A. Rosted, A. Khatee Zathul, L. Schumacher, G. Sommani, K. Meagher, C. Argüelles, K. Carloni, J. P. Yanez, A. Noell, F. Varsi, M. Wolf, E. Kun, Z. Marka, J. Brostean-Kaiser, N. Lad, D. Kappesser, T. Ruhe, R. Procter- Murphy, R. Maruyama, A. R. Fazely, P. Coleman, N. Chau, A. Pizzuto, M. U. Nisa, D. Delgado, A. V. Senthil Kumar, D. Berley, S. H. Choi, S. Chattopadhyay, J. V. Mead, A. Ghadimi, K. Kruiswijk, P. Soldin, M. Liubarska, T. Karg, J. Hardin, G. Wrede, M. Ha Minh, N. Kamp, M. Schaufel, C. Finley, A. Garcia, M. Garcia, L. Witthaus, M. Jacquart, J. M. Conrad, F. Lucarelli, C. Glaser, L. Paul, M. V. G. B. SILVA, X. S. Kang, C. Love, F. Schlüter, M. Zimmerman, S. Sclafani, M. A. Unland Elorrieta, W. Kang, C. Haack, A. Kheirandish, C. De Clercq, J. Hellrung, M. Ahlers, A. Zegarelli, D. Guevel, S. BenZvi, R. Hmaid, S. Yoshida, S. Blot, A. Balagopal V., R. T. Burley, R. Corley, A. Sandrock, Z. Brisson-Tsavoussis, S. Robertson, J. Veitch-Michaelis, O. Botner, P. Fürst, J. C. Díaz-Vélez, H. Dujmovic, S. Goswami, A. Desai, M. Prado Rodriguez, S. N. Axani, W. Esmail, D. Fox, E. Ganster, A. Pontén, G. Garg, M. Dittmer, K. L. Fan, J. L. Kelley, L. Brusa, M. A. Campana, Z. Rechav, B. Pries, C. Pérez de los Heros, Y. H. Lyu, D. Salazar-Gallegos, N. Valtonen-Mattila, P. Zilberman, C. Ha, D. Veske, T. Stuttard, L Fischer, L. Seen, F. Mayhew, A. Weindl, F. Bontempo, L. Hamacher, M. Hünnefeld, S. Yu, J. van Santen, L. Eidenschink, O. Janik, L. Lu, R. Snihur, T. Glüsenkamp, Y. Merckx, M. Thiesmeyer, M. Karl, F. Yu, J. Krishnamoorthi, D. Chirkin, K. B. M. Mahn, D. J. Koskinen, U. Naumann, J. A. González, A. Kappes, M. Lincetto, Y. Makino, E. Resconi, S. Seunarine, J. Werthebach, S. Schwirn, P. Desiati, L. Ruohan, C. Girard-Carillo, M. Nakos, R. W. Moore, L. Kardum, T. Schmidt, C. H. Wiebusch, S. Reusch, M. Khanal, J. Böttcher, P. Savina, G. de Wasseige, A. A. Harnisch, J. A. Aguilar, S. Griffin, R. Shah, C. Walck, J. Vara, S. Verpoest, F. McNally, S. Marka, G. W. Sullivan, J. P. Lazar, D. R. Williams, A. Domi, A. Wang, D. Butterfield, Y. Kobayashi, C. Rott, K. Hanson, K. Hymon, R. Engel, U. Katz, T. Stürwald, E. Yildizci, M. Baricevic, S. J. Gray, T. Stezelberger, J. Madsen, A. Medina, S. Mechbal, N. Rad, A. Diaz, C. Spiering, T. Pernice, R. Young, M. Jansson, E. Bernardini, T. Stanev, P. Hatch, E. N. Paudel, M. Kauer, H. Kolanoski, B. J. P. Jones, S. Hickford, A. Ishihara, T. Yuan, I. Caracas, N. M. Amin, M. Stamatikos, T. Montaruli, C. Bellenghi, J. Vandenbroucke, Z. K. Chen, E. O’Sullivan, W. Hou, R. C. Bay, A. Terliuk, M. Moulai, P. Koundal, I. Taboada, P. Sevle Myhr, W. Luszczak, D. Tosi, R. Koirala, G. M. Spiczak, M. Hostert, M. Rongen, J. Weldert, T. Huber, A. Vijai, M. Weyrauch, J. Savelberg, A. K. Upadhyay, M. Meier, K. Helbing, P. Zhelnin, M. Plum, N. Heyer, A. Y. Wen, S. Boser, W. Iwakiri, E. Ellinger, A. Trettin, A. Katil, D. Vannerom, W. Marie Sainte, J. Evans, P. Schaile, D. Elsässer, E. Krupczak, Y. B. Liu, S. W. Barwick, T. Krishnan, L. Halve, K. Dutta, S. Sarkar, L. Köpke, J. Peterson, E. Magnus, A. Sègaard, C. Weaver, P. A. Evenson, S. Shefali, A. Leszczyńska, Z. D. Zhang, S. Bash, S. Schindler, V. Palusova, G. H. Collin, M. Jeong, H. Erpenbeck, L. Merten, N. Park, S. Vergara Carrasco, K. Tollefson, I. Martinez-Soler, M. Jin, M. Lamoureux, R. Morse, I. Safa, C. Spannfellner, S. Griswold, C. Günther, I. C. Mariş, S. Deng, E. Blaufuss, T. Mukherjee
article en
1 citations

Abstract

Abstract In the IceCube Neutrino Observatory, a signal of astrophysical neutrinos is obscured by backgrounds from atmospheric neutrinos and muons produced in cosmic-ray interactions. IceCube event selections used to isolate the astrophysical neutrino signal often focus on the morphology of the light patterns recorded by the detector. The analyses presented here use the new IceCube Enhanced Starting Track Event Selection (ESTES), which identifies events likely generated by muon–neutrino interactions within the detector geometry, focusing on neutrino energies of 1–500 TeV with a median angular resolution of 1.4 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mover> <mml:mrow/> <mml:mtext>°</mml:mtext> </mml:mover> </mml:math> . Selecting for starting-track events filters out not only the atmospheric-muon background but also the atmospheric-neutrino background in the southern sky. This improves IceCube’s muon–neutrino sensitivity to southern-sky neutrino sources, especially for Galactic sources that are not expected to produce a substantial flux of neutrinos above 100 TeV. In this work, the ESTES sample was applied for the first time to search for astrophysical sources of neutrinos, including a search for diffuse neutrino emission from the Galactic plane. No significant excesses were identified from any of the analyses; however, constraining limits are set on the hadronic emission from TeV gamma-ray Galactic plane objects and models of the diffuse Galactic plane neutrino flux.

The Astrophysical JournalVol. 998(1)
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Astrophysics and Cosmic Phenomena
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