First constraints on point-like astrophysical sources using Baikal-GVD muon neutrino events
GVD CollaborationV. A. AllakhverdyanJoint Institute for Nuclear Research , Dubna , 141980 , RussiaA. V. AvrorinInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaA. V. AvrorinInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaV. M. AynutdinovInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaI. A. BelolaptikovJoint Institute for Nuclear Research , Dubna , 141980 , RussiaZ. BeňušováComenius University , Bratislava , 81499 , SlovakiaE. A. BondarevInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaI. V. BorinaJoint Institute for Nuclear Research , Dubna , 141980 , RussiaN. M. BudnevIrkutsk State University , Irkutsk , 664003 , RussiaV. A. ChadymovA. S. ChepurnovSkobeltsyn Institute of Nuclear Physics MSU , Moscow , 119991 , RussiaV. Y. DikInstitute of Nuclear Physics of theA. N. DmitrievaNational Research Nuclear University MEPHI , Moscow , 115409 , RussiaG. V. DomogatskyInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaA. A. DoroshenkoInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaR. DvornickýCzech Technical University in Prague , Prague , 11000 , Czech RepublicA. N. DyachokIrkutsk State University , Irkutsk , 664003 , RussiaZh. -A. M. DzhilkibaevE. EckerováComenius University , Bratislava , 81499 , SlovakiaT. V. ElzhovJoint Institute for Nuclear Research , Dubna , 141980 , RussiaV. N. FominA. R. GafarovIrkutsk State University , Irkutsk , 664003 , RussiaK. V. GolubkovInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaA. R. GordeevJoint Institute for Nuclear Research , Dubna , 141980 , RussiaT. I. GressIrkutsk State University , Irkutsk , 664003 , RussiaK. G. KebkalLATENA , St. Petersburg , 199106 , RussiaV. K. KebkalLATENA , St. Petersburg , 199106 , RussiaI. V. KharukInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaS. S. KhokhlovNational Research Nuclear University MEPHI , Moscow , 115409 , RussiaE. V. KhramovJoint Institute for Nuclear Research , Dubna , 141980 , RussiaM. M. KolbinJoint Institute for Nuclear Research , Dubna , 141980 , RussiaS. O. KoligaevINFRAD , Dubna , 141980 , RussiaK. V. KonischevJoint Institute for Nuclear Research , Dubna , 141980 , RussiaA. V. KorobchenkoJoint Institute for Nuclear Research , Dubna , 141980 , RussiaA. P. KoshechkinInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaV. A. KozhinSkobeltsyn Institute of Nuclear Physics MSU , Moscow , 119991 , RussiaM. V. KruglovJoint Institute for Nuclear Research , Dubna , 141980 , RussiaV. F. KulepovNizhny Novgorod State Pedagogical UniversityA. A. KulikovIrkutsk State University , Irkutsk , 664003 , RussiaY. E. LemeshevIrkutsk State University , Irkutsk , 664003 , RussiaM. V. LisitsinNational Research Nuclear University MEPHI , Moscow , 115409 , RussiaS. V. LovtsovIrkutsk State University , Irkutsk , 664003 , RussiaR. R. MirgazovIrkutsk State University , Irkutsk , 664003 , RussiaE. S. MorgunovNational Research Nuclear University MEPHI , Moscow , 115409 , RussiaD. V. NaumovJoint Institute for Nuclear Research , Dubna , 141980 , RussiaA. S. NikolaevSkobeltsyn Institute of Nuclear Physics MSU , Moscow , 119991 , RussiaI. A. PerevalovaIrkutsk State University , Irkutsk , 664003 , RussiaA. A. PetrukhinNational Research Nuclear University MEPHI , Moscow , 115409 , RussiaD. P. PetukhovInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaE. N. PliskovskyJoint Institute for Nuclear Research , Dubna , 141980 , RussiaM. I. RozanovSt. Petersburg State Marine Technical University , St. Petersburg , 190008 , RussiaE. V. RyabovIrkutsk State University , Irkutsk , 664003 , RussiaG. B. SafronovInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaB. A. ShaybonovJoint Institute for Nuclear Research , Dubna , 141980 , RussiaA. S. SheshukovJoint Institute for Nuclear Research , Dubna , 141980 , RussiaV. Y. ShishkinSkobeltsyn Institute of Nuclear Physics MSU , Moscow , 119991 , RussiaE. V. ShirokovSkobeltsyn Institute of Nuclear Physics MSU , Moscow , 119991 , RussiaF. ŠimkovicComenius University , Bratislava , 81499 , SlovakiaA. E. SirenkoJoint Institute for Nuclear Research , Dubna , 141980 , RussiaA. V. SkurikhinSkobeltsyn Institute of Nuclear Physics MSU , Moscow , 119991 , RussiaA. G. SolovjevJoint Institute for Nuclear Research , Dubna , 141980 , RussiaM. N. SorokovikovJoint Institute for Nuclear Research , Dubna , 141980 , RussiaI. ŠteklCzech Technical University in Prague , Prague , 11000 , Czech RepublicA. P. StromakovInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaO. V. SuvorovaInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaV. A. TabolenkoIrkutsk State University , Irkutsk , 664003 , RussiaV. I. TretyakJoint Institute for Nuclear Research , Dubna , 141980 , RussiaG. V. TrubnikovJoint Institute for Nuclear Research , Dubna , 141980 , RussiaB. B. UlzutuevJoint Institute for Nuclear Research , Dubna , 141980 , RussiaZ. L. WangJoint Institute for Nuclear Research , Dubna , 141980 , RussiaY. V. YablokovaJoint Institute for Nuclear Research , Dubna , 141980 , RussiaD. N. ZaborovInstitute for Nuclear Research , Russian Academy of Sciences , Moscow , 117312 , RussiaS. I. ZavyalovMinistry of Energy of the Republic of Kazakhstan , Almaty , 050032 , KazakhstanD. Y. ZvezdovJoint Institute for Nuclear Research , Dubna , 141980 , Russia
2026
ABI
Annotatsiya
Baikal-GVD is a new-generation neutrino telescope under final construction stages in Lake Baikal, Russia. With an instrumented volume already at 0.7 km$^3$, 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 $χ^2$-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$^\circ$ and +38$^\circ$. 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.
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