IceCube neutrino point-source searches in the direction of the KM3NeT ultra-high-energy event

@misc{abbasi2026icecube,
  title = {{IceCube neutrino point-source searches in the direction of the KM3NeT ultra-high-energy event}},
  author = {R. Abbasi and M. Ackermann and J. Adams and J. A. Aguilar and M. Ahlers and J. M. Alameddine and S. Ali and N. M. Amin and K. Andeen and C. Argüelles and S. Athanasiadou and S. N. Axani and R. Babu and X. Bai and A. Balagopal V. and S. W. Barwick and V. Basu and R. Bay and J. J. Beatty and J. Becker Tjus and J. Beise and C. Bellenghi and S. Benkel and S. BenZvi and D. Berley and E. Bernardini and D. Z. Besson and E. Blaufuss and L. Bloom and S. Blot and F. Bontempo and J. Y. Book Motzkin and C. Boscolo Meneguolo and S. Böser and O. Botner and J. Braun and B. Brinson and Z. Brisson-Tsavoussis and L. Brusa and R. T. Burley and D. Butterfield and K. Carloni and J. Carpio and N. Chau and Y. C. Chen and Z. Chen and D. Chirkin and S. Choi and A. Chubarov and B. A. Clark and D. A. Coloma Borja and A. Connolly and J. M. Conrad and D. F. Cowen and C. De Clercq and J. J. DeLaunay and D. Delgado and T. Delmeulle and S. Deng and P. Desiati},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.10931},
  eprint = {2609.10931},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.10931},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - IceCube neutrino point-source searches in the direction of the KM3NeT ultra-high-energy event
AU  - R. Abbasi
AU  - M. Ackermann
AU  - J. Adams
AU  - J. A. Aguilar
AU  - M. Ahlers
AU  - J. M. Alameddine
AU  - S. Ali
AU  - N. M. Amin
AU  - K. Andeen
AU  - C. Argüelles
AU  - S. Athanasiadou
AU  - S. N. Axani
AU  - R. Babu
AU  - X. Bai
AU  - A. Balagopal V.
AU  - S. W. Barwick
AU  - V. Basu
AU  - R. Bay
AU  - J. J. Beatty
AU  - J. Becker Tjus
AU  - J. Beise
AU  - C. Bellenghi
AU  - S. Benkel
AU  - S. BenZvi
AU  - D. Berley
AU  - E. Bernardini
AU  - D. Z. Besson
AU  - E. Blaufuss
AU  - L. Bloom
AU  - S. Blot
AU  - F. Bontempo
AU  - J. Y. Book Motzkin
AU  - C. Boscolo Meneguolo
AU  - S. Böser
AU  - O. Botner
AU  - J. Braun
AU  - B. Brinson
AU  - Z. Brisson-Tsavoussis
AU  - L. Brusa
AU  - R. T. Burley
AU  - D. Butterfield
AU  - K. Carloni
AU  - J. Carpio
AU  - N. Chau
AU  - Y. C. Chen
AU  - Z. Chen
AU  - D. Chirkin
AU  - S. Choi
AU  - A. Chubarov
AU  - B. A. Clark
AU  - D. A. Coloma Borja
AU  - A. Connolly
AU  - J. M. Conrad
AU  - D. F. Cowen
AU  - C. De Clercq
AU  - J. J. DeLaunay
AU  - D. Delgado
AU  - T. Delmeulle
AU  - S. Deng
AU  - P. Desiati
PY  - 2026
DA  - 2026/09/10
PB  - arXiv
DO  - 10.48550/arxiv.2609.10931
UR  - https://arxiv.org/abs/2609.10931
AB  - While still under construction, the KM3NeT Astroparticle Research with Cosmics in the Abyss (ARCA) detector recorded a ∼200 PeV neutrino on February 13th, 2023. This event is the highest-energy neutrino reported. IceCube, a cubic kilometer neutrino detector located at the geographic South Pole, has previously detected neutrinos up to approximately 10 PeV. We search for high-energy neutrinos from the location of the KM3NeT event using 15 years of IceCube data and considering three temporal hypotheses: steady or flaring in time coincidence, or at an arbitrary time. We find no evidence for neutrino emission for any of the studies performed. Correspondingly, we set upper limits on the neutrino flux from a point source in the direction of KM3-230213A. We compare these limits to KM3NeT's estimated flux and show that an astrophysical explanation of this event is strongly constrained for a variety of spectral assumptions for a steady or transient point source with the flux inferred from the single KM3NeT ultra-high-energy event assuming a spectral index of 2.0.
ER  -