First constraints on point-like astrophysical sources using Baikal-GVD muon neutrino events
Abstract
Baikal-GVD is a new-generation neutrino telescope currently under construction in Lake Baikal, Russia. With an instrumented volume already at 0.7 km, Baikal-GVD is currently the largest neutrino telescope in the Northern hemisphere. A sub-degree angular resolution, made possible thanks to high purity of Baikal water, further enhances Baikal-GVD sensitivity to cosmic neutrino sources. In this work, we employ track-like events collected from the partially completed detector between April 2019 and March 2024 to search for muon neutrino fluxes from 92 astrophysical objects of interest. For this, a -based track reconstruction method is used along with a cut-based analysis. The analysis uses upward-going muons only, providing coverage for declinations between -90 and +38. No significant excess has been found, so upper limits are reported. The obtained limits are competitive with those set by ANTARES and KM3NeT. We briefly comment on a possible low-significance indication of an excess from the direction of Westerlund 1. This work sets a major milestone on the way to full-scale scientific exploitation of Baikal-GVD data.
Cite
@article{arxiv.2603.21261,
title = {First constraints on point-like astrophysical sources using Baikal-GVD muon neutrino events},
author = {GVD Collaboration and V. A. Allakhverdyan and A. D. Avrorin and A. V. Avrorin and V. M. Aynutdinov and I. A. Belolaptikov and Z. Beňušová and E. A. Bondarev and I. V. Borina and N. M. Budnev and V. A. Chadymov and A. S. Chepurnov and V. Y. Dik and A. N. Dmitrieva and G. V. Domogatsky and A. A. Doroshenko and R. Dvornický and A. N. Dyachok and Zh. -A. M. Dzhilkibaev and E. Eckerová and T. V. Elzhov and V. N. Fomin and A. R. Gafarov and K. V. Golubkov and A. R. Gordeev and T. I. Gress and K. G. Kebkal and V. K. Kebkal and I. V. Kharuk and S. S. Khokhlov and E. V. Khramov and M. M. Kolbin and S. O. Koligaev and K. V. Konischev and A. V. Korobchenko and A. P. Koshechkin and V. A. Kozhin and M. V. Kruglov and V. F. Kulepov and A. A. Kulikov and Y. E. Lemeshev and M. V. Lisitsin and S. V. Lovtsov and R. R. Mirgazov and E. S. Morgunov and D. V. Naumov and A. S. Nikolaev and I. A. Perevalova and A. A. Petrukhin and D. P. Petukhov and E. N. Pliskovsky and M. I. Rozanov and E. V. Ryabov and G. B. Safronov and B. A. Shaybonov and A. S. Sheshukov and V. Y. Shishkin and E. V. Shirokov and F. Šimkovic and A. E. Sirenko and A. V. Skurikhin and A. G. Solovjev and M. N. Sorokovikov and I. Štekl and A. P. Stromakov and O. V. Suvorova and V. A. Tabolenko and V. I. Tretyak and G. V. Trubnikov and B. B. Ulzutuev and Z. Wang and Y. V. Yablokova and D. N. Zaborov and S. I. Zavyalov and D. Y. Zvezdov},
journal= {arXiv preprint arXiv:2603.21261},
year = {2026}
}
Comments
16 pages, 3 figures, 1 table. Submitted to Astronomy Letters